Energy Efficiency - Commercial Buildings - Premium office - Case Study 1 … · · 2018-03-26Case Study: Energy Efficiency for Commercial Buildings Premium Office ... a mixed use

NCC 2019

Energy EfficiencyCommercial Buildings

Premium office - Case Study 1

Supporting Document

Case Study: Energy Efficiency for Commercial Buildings Premium Office Case Study 1

2018 Commonwealth of Australia and States and Territories of Australia

The information in this document is intended to be used as guidance material only, and is in no way a substitute for the NCC and related State

and Territory legislation. The General Manager of the Australian Building Codes Board (ABCB) Office, as agent for the Commonwealth of

Australia and States and Territories of Australia, does not accept any liability howsoever arising from or connected to the use or reliance on any

information in this publication to the maximum extent permitted by law. The information in this publication is provided on the basis that all persons

accessing the information undertake responsibility for assessing the relevance and accuracy of the information to their particular circumstances.

Australian Building Codes Board Page 1

This document provides a case study for a premium office to assist in explaining the key

changes proposed to the energy efficiency provisions for commercial buildings in the

National Construction Code (NCC) 2019 Volume One.

Case Study Summary

Type of Compliance Solution:

NCC References:

Climate Zone:

Building Classification:

Construction Type:

Combination of a Performance and a Deemed-To- Satisfy Solution

NCC 2016 Volume One and NCC 2019 Volume One

Public Comment Draft; JV3, DTS Provisions

(Section J) and JV2 (Green Star)

6

Mixed Use: Class 2, 3, 5 and 7

Mixed use space of premium office, 5 star hotel and

residential apartments

Background

Under the Council of Australian Governments (COAG) 2015 National Energy Productivity

Plan (NEPP), and with endorsement by the Building Ministers Forum, the Australian

Building Codes Board (ABCB) was requested to update the energy efficiency provisions in

NCC 2019.

The NEPP is a COAG Energy Council agreed package of measures, which aims to

improve Australias energy productivity by 40 per cent by 2030. Measure 31 of the NEPP

forecasts strong productivity and emissions reduction benefits from revising the NCCs

energy efficiency provisions, particularly for commercial buildings.

On this basis, for NCC 2019 the ABCB was instructed to focus on increasing the

stringency of the energy efficiency provisions for commercial buildings (the subject of this

document).

Introduction

This case study is one of a series produced by the ABCB to support the Public Comment

Draft of 2019 NCC. The purpose of this Case Study is to help illustrate the impact of the

proposed changes to Section J of Volume One of the NCC. It shows what changes, if

any, a building designed to meet the 2016 NCC provisions of Section J would need to

make in order to comply with those of the NCC 2019.

Case Study: Energy Efficiency for Commercial Buildings Premium Office Case Study 1

Australian Building Codes Board Page 2

Note that any opinions on the impact of the proposed changes to Section J are expressed

by the Case Study author. It should not be regarded as those of the ABCB nor an

indication that the NCC will be changed to reflect these opinions.

It should be further noted that part of the proposed changes to Section J in NCC 2019

include changes in the calculation methodologies used to determine predicted energy use

by components in a building. This can make direct comparison between the 2016 and

2019 versions of a building solution difficult. Instances where this issue arises are

highlighted in the text.

Acknowledgements

The ABCB acknowledges the assistance of:

1. the Building Owners, Cbus Property, ISPT Pty Ltd and the Hotel Operator, for allowing their building to be used for the purposes of this case study, and for providing the necessary information for its completion; and

2. the Department of the Environment and Energy for peer reviewing the content of this case study.

ABCB

NCC 2019 SECTION J REVISIONS

CASE STUDY: COLLINS ARCH DEVELOPMENT - 447 COLLINS STREET, MELBOURNE

FEBRUARY 2018

This document may contain confidential and legally privileged information, neither of which are

intended to be waived, and must be used only for its intended purpose. Any unauthorised copying,

dissemination or use in any form or by any means other than by the addressee, is strictly prohibited.

If you have received this document in error or by any means other than as authorised addressee,

please notify us immediately and we will arrange for its return to us.

PS107167-180222-JVM-NCC

2019 447 Collins St Report

Rev.2

February 2018

NCC 2019 Section J Revisions

Case Study: Collins Arch Development - 447 Collins Street, Melbourne

ABCB

WSP

Level 27, 680 George Street

Sydney NSW 2000

GPO Box 5394

Sydney NSW 2001

Tel: +61 2 9272 5100

Fax: +61 2 9272 5101

wsp.com

REV DATE DETAILS

01 1/02/2018 Draft for information

02 22/02/2018 Including comments from ABCB

NAME DATE SIGNATURE

Prepared by: Jerin Poovely/Brenda Kingston 22/02/2018

Reviewed by: Katie Fallowfield 221/02/2018

Approved by: Katie Fallowfield 22/02/2018

...............................................

.....................................

DEFINITIONS AND ABBREVIATIONS

................................

..................................................................

.........

III

................................

EXECUTIVE SUMMARY

................................

.............................................................................

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1

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1 INTRODUCTION

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1

.

1.1 About the Building

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2

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1.2 Architectural plans and Render of the building

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4

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1.2.1 Architectural plans

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4

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1.2.2 Architectural Render

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5

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2 NCC ASSESSMENT SUMMARY

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8

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2.1 Part J1: Building Fabric

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8

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2.1.1 J1.3 Roof and Ceiling Construction

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8

2.1.2 J1.4 Roof Lights 92.1.3 J1.5 Wall-Glazing 102.1.4 J1.6 Floors 13

2.2 Part J2: Glazing 13

2.3 Air-Conditioning and Ventilation Systems 13

2.3.1 Systems Descriptions and Control 132.3.2 Design Criteria 142.3.3 Building Systems Information 142.3.4 Equipment Overview 152.3.5 NCC 2016 DTS Compliance 172.3.6 NCC 2019 DTS Compliance 19

2.4 Part J6: Artificial Lighting and Power 24

2.5 J6.7/8 Lifts/Escalators and Moving Walkways 24

2.6 Part J7: Heated Water Supply and Swimming Pool

and Spa Pool Plant 25

2.7 Other Measures Influencing NCC Compliance 25

3 SIMULATION PARAMETERS 26

3.1 Weather File 26

3.2 Building Loads 26

3.3 Building Geometry 27

4 SIMULATION RESULTS FOR PERFORMANCE

BASED CASE 29

4.1 Thermal comfort assessment. 31

TABLE OF CONTENTS

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5

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ECONOMIC ANALYSIS

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33

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5.1

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Building fabric and glazing

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33

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5.2 ................................Mechanical services................................

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33

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5.3 electrical services 34

6 CONCLUSIONS 35

7 COMMENTARY ON THE NEW SECTION J

PROVISIONS 2019 36

7.1 Parts J1-J2 Building Fabric 36

7.2 Part J5 Mechanical Services 37

7.3 Part J6 Electrical Services 38

Project No MEL1404400 NCC 2019 Section J Revisions Case Study: Collins Arch Development - 447 Collins Street, Melbourne ABCB

WSP February 2018

Page iii

DEFINITIONS AND ABBREVIATIONS

ABCB

Building Fabric

DB

DTS

ESD

Faade Solar

Admittance

FCU

HVAC

JV3

NCC

PMV

PV

R-Value

SHGC

Solar Absorptance

U-Value

VRF/VRV

Wall-Glazing

WB

WWR

Australian Building Codes Board

The basic building structural elements and components of a building

including the roof, ceilings, walls and floors.

(C) Dry Bulb. The temperature of air measured by a thermometer freely

exposed to the air, but shielded from radiation and moisture

Deemed-to-satisfy.

Ecologically Sustainable Design

The fraction of incident irradiance on externally facing wall-glazing

construction that adds heat to a buildings space.

Fan Coil Unit.

Heating, Ventilation and Air-Conditioning. The mechanical

Verification Method 3 of Section J of the National Construction Code.Reference Building Solution.

National Construction Code

Predicted Median Vote. A measure of the thermal perception of building

occupants determined in accordance with ANSI/ASHRAE Standard 55.

Photovoltaic, solar panels.

(m2.K/W) The thermal resistance of a component or element, calculated by

dividing its thickness by its thermal conductivity.

Solar Heat Gain Co-efficient. The fraction of incident solar radiation

admitted through a window, both directly transmitted and absorbed and

subsequently released inward.

The proportion of the total incident solar radiation that is absorbed by the

material.

(W/m2.K) The thermal transmittance of a component or element,

calculated by dividing its thermal conductivity by its thickness.

Variable Refrigerant Flow/Variable Refrigerant Volume

The combination of wall and glazing components comprising the envelope

of a building.

(C) Wet Bulb. The temperature a parcel of air would have if it were

cooled to saturation (100% relative humidity) by the evaporation of water

into it, with the latent heat being supplied by the parcel.

Window to Wall Ratio. The ratio of window to wall area for a faade.


WSP February 2018

Page 1

EXECUTIVE SUMMARY

WSP has been approached by the ABCB to test the draft revisions of the NCC 2019 Section J revision as it impacts upon

NCC 2016 compliant buildings. This report outlines the impacts on the Collins Arch Development a mixed use high

rise building which contains Class 2, 3, Class 5 and Class 7, incorporating residential, retail, hotel and office zones in

Melbourne, VIC.

The building was designed with Green Star in mind targeting a 5 star Green Star Design & As-Built v1.1 rating, and 5

star NABERS rating for the commercial office. Due to these targets, the building is efficient by nature incorporating

high efficiency air-conditioning systems with extensive shading and a high-performance faade. The building achieves

NCC 2016 compliance through the verification method JV3 for building fabric (Parts J1 and J2) and DTS compliance for services resulting in a hybrid compliance solution.

In order to comply with the Draft Section J Requirements for NCC 2019 through Verification Method JV3 no items on the building fabric were altered from those of the existing building (Parts J1 and J2). This results in a null cost impact.

In order to achieve compliance with the proposed DTS requirements Section J of the NCC 2019, some minor changes

need to be made to the HVAC and Ventilation systems. This includes doubling the thickness of refrigeration and heating

hot water pipes. Although theoretically these changes can be made, it would require significant coordination work with

the architect and other disciplines and there is no guarantee that the spatial requirements would be able to be

accommodated.

The lighting design for the Collins Arch project was found to be compliant with the proposed requirements of 2019 with

the exception of the lighting power density in the hotel and commercial lobbies and hotel standard rooms. Compliance

could be achieved in this instance through reducing the lighting installed and no cost addition would be expected,

however the amenity of the spaces may be impacted. Alternatively, the project could seek to demonstrate compliance via a

JV3 Verification Method for the building services, allowing the higher lighting power density in the hotel and commercial lobbies and the hotel standard rooms to be offset by higher performing spaces elsewhere in the building.

The lifts proposed for the building are expected to be compliant with the 2019 requirements.

The building and services were found to be generally in accordance with the new provisions of Section J of the NCC

2019. Minimal cost impact is expected to make minor changes to the systems design to meet the more prescriptive

provisions of Parts J5 and J6.


WSP February 2018

Page 2

1 INTRODUCTIONWSP has been approached by the ABCB to test the draft revisions of the NCC 2019 Section J revision as it impacts upon

NCC 2016 compliant buildings. This report outlines the impacts on the Collins Arch Development located at 447 Collins

Street in Melbourne. This is a mixed use development (commercial offices, retail, hotel and residential).

1.1 ABOUT THE BUILDING

The proposed development at 447 Collins Street, Melbourne (site bounded by Collins St, William St, Market St and

Flinders Lane) will comprise a mixed use space of basement carpark, premium quality commercial office, 5 star Hotel

and residential apartments.

A building overview is as per below:

1 Hotel

a 13 levels of hotel, which includes 12 levels of rooms with 294 hotel keys with 12,391 m2 of NLA

b Hotel guest amenities including pool & spa, day spa, fitness centre on Level 14 and Level 15

c Ballroom, pre- function areas, and restaurants located on Level 1 and Podium Levels

d Prominent Ground Floor guest drop off and check-in lobby, with access from Porte-Cochere on Lower Ground

and pedestrian access from Flinders Lane

e Ground Floor lobby which includes check-in facilities, all day dining, hotel lounge & reception.

2 Commercial

a 24 levels of commercial office space, commencing at Level 4 up to Level 25. The office space has a NLA of

49343 m2. The retail spaces located on the lower ground levels have a GLAR of 798 m2. The commercial

component is targeting:

i 5 star Green Star Design & As Built V1.1,

ii 5 Star NABERS Energy (5.5 star NABERS aspiration), and

iii WELL Building Certification

b Lower ground level commercial end-of-trip facilities

3 Residential

a 24 levels of high end residential apartments, commencing at Level 16 through to Level 39

b Residential apartment of 1-3 bedrooms including balcony & terraced areas

c Ground Floor residential lobby

The proposed development was designed with Green Star in mind to target a Design & As-Built certification as listed in

detail in the Table below (Refer to Table 1.1), due to this the building is efficient by nature incorporating a mixed mode

ventilation system with extensive shading and a high-performance faade. The building achieves NCC 2016 compliance

through the Verification Method JV3 for building fabric (Parts J1 and J2) and DTS compliance for services resulting in a hybrid compliance solution.

Table 1.1 below outlines further information about the proposed project.


WSP February 2018

Page 3

Table 1.1 Collins Arch Building Information

BUILDING NAME AND

ADDRESS

COLLINS ARCH DEVELOPMENT, 447 COLLINS STREET, MELBOURNE,

3000

Owners Cbus Property, ISPT Pty Ltd, and the Hotel Operator

Developer Cbus Property

Builder Multiplex Pty Ltd

Architect Woods Bagot and SHoP Architects, and Hachim for the Hotel fitout

Services consultants NDY Mechanical, VT, Hydraulic

WSP - ESD, Electrical and Fire protection

Leasing agent N/A

Client development manager Victor Istanto, Cbus Property

End users Various (Including multiple residential owners, commercial and retail tenants, and

the hotel operator)

Building classification Class 2, 3 5 and Class 7

Climate zone 6 Melbourne Airport

Deemed building hours of

operation.

Daytime for Class 5, and potentially 24 hours for most other spaces. Table 2a (Class

3 simulation profile) used in simulation.

Size GFA: circa 173,000m2

Number of stories 49 (5 basement/semi below ground, 44 above)

Completion date December 2019. Construction commenced mid 2017.

Construction cost In excess of $1 billion

Proposed or achieved

environmental certifications and

status

Residential

- Green Star Design & As-Built v1.1 4 Star

Hotel


Office

- WELL Building Certification


- 5 star NABERS Energy


WSP February 2018

Page 4

1.2 ARCHITECTURAL PLANS AND RENDER OF THE

BUILDING

1.2.1 ARCHITECTURAL PLANS

Figure 1.1 Floor Plan - Collins Street. The site is bound by Collins Street to the North, Market Street (East), William

Street (West) and Flinders Lane (South)


WSP February 2018

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1.2.2 ARCHITECTURAL RENDER

Figure 1.2 Public Park located on site situated on the corner of Collins Street and Market Street

Figure 1.3: Commercial Lobby - Situated on Collins Street Level


WSP February 2018

Page 6

Figure 1.4: Level 14/15 Hotel Amenities - Pool

Figure 1.5:

Hotel Porte Cochere - located Flinders Lane


WSP February 2018

Page 7

Figure 1.6: Hotel Lobby Area - Entrance through Flinders Lane

Figure 1.7: Hotel - Standard Room Layout


WSP February 2018

Page 8

2 NCC ASSESSMENT SUMMARYThe NCC assessment comparing compliance with NCC 2016 and NCC 2019 is detailed below divided into Part J1

through J7 and subsections. Each section assesses separately the compliance requirements and methods used for both

NCC 2016 and 2019 and the cost and design impact involved in upgrading the provisions to comply with NCC 2019 if

required.

2.1 PART J1: BUILDING FABRIC

The following sections detail the compliance criteria for NCC 2016 and NCC 2019 for the building fabric, identifying whether the criteria are achieved through a deemed-to-satisfy (DTS) solution or Verification Method for both NCC 2016 and NCC 2019.

2.1.1 J1.3 ROOF AND CEILING CONSTRUCTION

The following section details the requirements and compliant parameters required for ceiling and roof construction as

seen below in Table 2.1.

Table 2.1 Collins Arch - NCC Roof and Ceiling Compliance Comparison

NCC 2016 COMPARISON NCC 2019 COMPARISON

NCC DTS Requirements R-Value 3.2 m2.K/W

Solar absorptance 0.4R-Value 3.2 m2.K/W

Solar absorptance 0.4

Total System

Values

Achieved

Simple, unbridged

calculation

U Value: 0.31 W/m2.K

R-Value: 3.2 m2.K/W

Solar absorptance 0.4As per NCC 2016 Parameters left

Allowing for the

effect of thermal

bridging


R-Value: 3.0 m2.K/W

Solar absorptance 0.4

NCC DTS Compliance Achieved NCC 2016 DTS provisions MET NCC 2019 DTS provisions NOT MET

by existing building

Compliance Method Achieved through JV3 Achieved through JV3 without

modification of existing building


WSP February 2018

Page 9

For a more detailed comparison of the requirements and compliant parameters see Appendix A.

Figure 2.1 Typical commercial roof and ceiling

Figure 2.2 Typical Residential and Hotel roof / ceiling

In order to comply with the Draft Section J Requirements for NCC 2019 through verification method JV3 no items were

altered from those existing building. This results in a null cost impact.

2.1.2 J1.4 ROOF LIGHTS


altered from those existing building. No Roof lights exist on the project. This results in a null cost impact.


WSP February 2018

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2.1.3 J1.5 WALL-GLAZING

The following section details the requirements and compliant parameters required for walls for NCC 2016 and NCC 2019

as seen below in Table 2.2. This table also details the Wall-Glazing requirements for NCC 2019 using method 1.

Table 2.2 Collins Arch NCC Wall Compliance Comparison


NCC DTS Requirements External Walls:

R-Value 2.8 m2.K/W

Solar Absorptance 0.6

Internal Envelope Walls:

R-Value 1.8 m2.K/W

All Walls

R-Value 1.0 m2.K/W

Wall-Glazing

Class 3 Zones

Orientations with a WWR > 20%:

U-Value 1.1 W/m2.K

Faade solar admittance 0.07

Solar absorptance: 0.6

Orientations with a WWR 20%:

R-Value 2.8 m2.K/W



Class 5, 6 Zones

Orientations with a WWR > 20%:

U-Value 2.0 W/m2.K



Orientations with a WWR 20%:

R-Value 1.4 m2.K/W



Total Wall

System Values

Achieved

Simple, unbridged

calculation

External Walls:

U-Value: 0.38 W/m2.k Solar Absorptance 0.6


U-Value: 1.67 W/m2.kAs per NCC 2016 Parameters left

Allowing for the

effect of thermal

bridging

External Walls:

U-Value: 0.45 W/m2.k Solar Absorptance 0.6


U-Value: 2.0 W/m2.k

Total Wall-Glazing System Values

Achieved

N/A U value: 1.35 3.5 W/m2.kFaade solar admittance: 0.09 0.25

WWR: 0% 98% (Orientation dependant)

NCC DTS Compliance Achieved NCC 2016 DTS provisions NOT

MET

NCC 2019 DTS provisions NOT MET by

existing building




WSP February 2018

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Figure 2.3 Typical wall constructions; Top External wall, Bottom Internal partition.


WSP February 2018

Page 12

The main glazing in Collins Arch is as below:

Mid-pane glazing parameters

U value: 1.4 W/m2.K

SHGC: 0.28

Typical whole of system window parameters

U Value: 2.5 W/m2 K

SHGC: 0.25

For further detail on wall and glazing elements including a breakdown of WWR per orientation see Appendix A.


altered from those of the existing building. This results in a null cost impact.


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2.1.4 J1.6 FLOORS

The following section details the requirements and compliant parameters required for walls for NCC 2016 and NCC 2019

as seen below in Table 2.3.

Table 2.3 447 Collins Arch - NCC Floor Comparison


NCC DTS Requirements Slab on Ground No requirement

Suspended Slab R-Value 2.0 m2.K/W

R value 2.0 m2.K/W 1

Total System

Values

Achieved

Simple, unbridged

calculationTypical Floor U Value: 2.5 W/m2.K

R-Value: 0.4 m2.K/W

As per NCC 2016 Parameters left

Allowing for the

effect of thermal

bridging and using

CIBSE Guide A

Section 3.5

Basement Floor U Value: 0.43 W/m2.K

R-Value: 2.3 m2.K/W

Slab on Ground U Value: 0.48 W/m2.K

R-Value: 2.1 m2.K/W

Suspended Floor U Value: 2.5 W/m2.K

R-Value: 0.4 m2.K/W

NCC DTS Compliance Achieved NCC 2016 DTS provisions NOT MET NCC 2019 DTS provisions NOT MET

by existing building



1 To be determined in accordance with Section 3.5 of CIBSE Guide A including the effect of ground or subfloor space



2.2 PART J2: GLAZING

This section has been removed in NCC 2019, glazing compliance is now demonstrated in Part J1.5. See J1.5 Wall-

Glazing above.

2.3 AIR-CONDITIONING AND VENTILATION SYSTEMS

2.3.1 SYSTEMS DESCRIPTIONS AND CONTROL

The following section describes, based on the information available, the air conditioning and ventilation systems serving

the development. This section also describes the arrangements for time of use control, economy cycle control, outside air

quantity control.

The development comprises of commercial levels, residential units, hotel room & amenities, and retail shops. Air

conditioning system is provided via various systems including cooling towers, water cooled chillers, gas fired boilers, air

cooled packaged AC units, VAV system, VRV split system etc.

Various areas are served by a mixed mode air conditioning system, where natural ventilation is employed when outdoor

conditions are suitable. The respective AHU controls were specified to include control for:


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CO2 monitoring and control system capable of adjusting the outside air rates, and

To operate with an economy cycle via minimum and economy cycle outside air motorised dampers.

2.3.2 DESIGN CRITERIA

The following section describes, based on the information available, the design criteria for the development (what the

system is designed to achieve).

Air Design Conditions External Conditions

- Summer: 35C DB / 21C WB

- Winter: 4C DB

Internal Conditions

- Cooling: 24C DB 1.5C

- Heating: 21C DB 1.5C

Refer to specification for detailed conditions for all spaces and occupancies

Heat Gains Refer to specification

2.3.3 BUILDING SYSTEMS INFORMATION

The following tables list the relevant documentation which demonstrates high-level system functional schematics, and

where relevant information can be found. Where available, the documentation shows plant, key system elements, pipe

and duct sizes, pipe and duct insulation, heat recovery, economy cycle.


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NAME REFERENCE KEY INFORMATION

Air Schematic M-SC-021 to M-SC-026 Plant & key system elements

Economy cycle and heat recovery

Chilled Water and Condenser Water

Schematic

M-SC-001 to M-SC-006 Plant & key system elements

Heating Hot Water and Gas Piping

Schematic

M-SC-011 to M-SC-016 Plant & key system elements

Floor Plan Layouts NDY DD/Tender Drawings dated

26.05.17

Duct sizes and insulation

Key system elements

Specification T-03 Updated Final Design

Development Issue

Overall system elements and

equipment schedules

2.3.4 EQUIPMENT OVERVIEW

The following section identifies, based on the information available, the chiller, water heater, fan and pump selections,

including fuel source (e.g. for heating, cooling equipment).

TYPE NAME DESCRIPTION FUEL SOURCE

Water-Cooled Chiller CH-CO-B3.01 to CH-CO-

B3.03, & CH-HT-B3.01 to

CH-HT-B3.02

Water-cooled Centrifugal

chiller with VSD & active

harmonic filters

Electric

Water-Cooled Packaged AC

Unit

PAC-RE-33.01 to PAC-RE-

33.06, PAC-RE-34.01

Water-Cooled Packaged unit

serving various residential

spaces

Electric

Air-Cooled Packaged AC

Unit

PAC-RE-28.01 Reverse cycle heat recovery

air handling unit

Electric

Chilled Water Pump CHWP-CO-B3.01 to

CHWP-CO-B3.03

Office chilled water system Electric

Heating Hot Water Pump HHWP-CO-40.01 to HHWP-

CO-40.03

Commercial heating hot

water system

Electric

Cooling Tower CT-CO-41.01 to CT-CO-

41.04, CT-HT-41.01 to CT-

HT-41.02, CT-RE-41.01 to

CT-RE-41.02, TCT-CO-

41.01 to TCT-CO-41.03

Condenser water system Electric

Boilers B-CO-40.01 to B-CO-40.03,

B-HT-02.01 to B-HT-02.02,

B-RE-40.01 to B-RE-40.02

Condensing Boiler Natural Gas


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Air Handling Unit All AHUs in NDY

Specification T-03

Air Handling Units Electric

Fan Coil Unit All FCUs in NDY

Specification T-03

Fan Coil Units Electric

Split Systems All split units in NDY

Specification T-03

AC Split Units Electric

Fans Refer to Appendix Miscellaneous ventilation

fans

Electric


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2.3.5 NCC 2016 DTS COMPLIANCE

The following section describes the relevant NCC 2016 applicable to the case study. Each clause is assessed against the

case-study for compliance and is indicated as Compliant or Non-Compliant.

NCC 2016 CLAUSE DESCRIPTION DESIGN COMPLIANCE

ASESSMENT

J3.5 Exhaust Fans An exhaust fan must be fitted with a

sealing device such as a self-closing

damper, filter or the like when serving

conditioned spaces.

Compliant

J5.2 Air-Conditioning Systems

Control An air-conditioning system must be able

to turn off when the served area is

unoccupied.

Compliant

Multi-zone systems must be able to:

Control each zone temp

independently

Not mix heated and cooled air to

generate desired temp

Not re-heat supply air more than 7.5K

Compliant

Economy cycle must be provided:

Climate zones 2or3 for >50kWr

systems,

Climate zones 4,5,6,7or8 for >35kWr

systems

Compliant

Water flow must be able to be stopped to

heaters, chillers, or coils not operating

Compliant

When supply air is able to be varied, fans

must be variable speed (excluding

packaged units)

Compliant

For sole-occupancy units in a Class 3

building, units must not operate if external

door or the like are open for more than 1

minute.

Compliant

Motorised outside air and return air

dampers must close if a system is

deactivated

Compliant

Compliance must not hinder smoke hazard

management or ventilation requirements

Compliant

Fans Must comply with Specification J5.2a

(include in appendix)

Potential Compliance


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- Some scheduled fan powers

exceed fan efficiency

requirements; however,

cannot confirm without

workshop drawings of

selected fans.

Pumps Pump powers must comply to Table 5.2. Compliant

Pumps >3kW pump power and >2L/s

must be capable of varying its speed in

response to varied load

Compliant

Spray systems for evaporative condensers

must not use >150W per L/s of spray

water

N/A

Insulation Ductwork must be insulated as per

Specification J5.2b.

Compliant

Piping and ancillaries must be insulated as

per Specification J5.2c.

Compliant

Space Heating Heaters must comply with Specification

J5.2d.

Compliant

Energy Efficiency Ratios Refrigerant chillers and packaged air

conditioners must comply with

Specification J5.2e.

Compliant

Time Switches Air conditioners >10kWr and heaters

>10kW must be provided with time

switch control as per Specification J6.

Not applicable to a single sole-occupancy

unit with a Class 2, 3 or 9c building, a

Class 4 part of a building, or 24hr

occupancies.

Compliant

J5.3 Mechanical Ventilation

Systems

The mechanical ventilation system must

be capable of being deactivated when part

of the building served by the system is not

occupied

Compliant

J5.4 Miscellaneous Exhaust

Systems

Misc. exhaust systems >1000L/s of

variable demand must be able to stop the

motor and be variable speed.

Not applicable to a single sole-occupancy

unit with a Class 2, 3 or 9c building, a

Class 4 part of a building, or 24hr

occupancies, or when exhaust air is

required to balance outdoor air ventilation

rates.

Compliant


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2.3.6 NCC 2019 DTS COMPLIANCE

The following section describes the relevant NCC 2019 applicable to the case study. Each clause is assessed against the

case-study for compliance and is indicated as Compliant or Non-Compliant. Where non-compliant, modifications to

the design are considered, and then re-assessed for compliance.

NCC 2019 CLAUSE DESCRIPTION DESIGN

COMPLIANCE

ASESSMENT

MODIFICATIONS

REQUIRED FOR

COMPLIANCE

J3.5 Exhaust Fans An exhaust fan must be sealed with a

device such as a self-closing damper,

filter or the like when serving

conditioned spaces. The penetrations

must also be sealed.

Compliant N/A

J5.2 Air-Conditioning

System Control

An air-conditioning system must be able

to turn off when the served area is

unoccupied.

Compliant N/A

Multi-zone systems must be able to:

Control each zone temp

independently

Not mix heated and cooled air to

generate desired temp

Not re-heat supply air more than

7.5K

Compliant N/A

Economy cycle must be provided in

accordance with Table J5.2 for climate

zones 4, 5, 6, 7, and 8 unless humidity

control is required

Compliant Economy cycle might be omitted for

several air-conditioning units where

previously required in NCC2016

(FCU-HT-02.01, FCU-HT-01.05 &

FCU-HT-01.06) as the air flow is

lower than the minimum required in

Table J5.2. Potential cost & spatial

savings.

Water flow must be able to be stopped to

heaters, chillers, or coils not operating

Compliant N/A

When supply air is able to be varied,

fans must be variable speed (excluding

packaged units)

Compliant N/A

For sole-occupancy units in a Class 3

building, must not operate of external

doors are open for more than 1 minute.

Compliant N/A


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COMPLIANCE

ASESSMENT

MODIFICATIONS

REQUIRED FOR

COMPLIANCE

Control components that are responsible

for the delivery of comfort conditions

must be able to use direct signals to

regulate the operation of the central

plant

Compliant N/A

Minimum control dead band of 1C

except where a smaller range is required

for specialised applications

Compliant N/A

Have balancing dampers and valves to

ensure design flow at each component is

not exceeded

Compliant N/A

Each independently operating space

>1000m and every separate floor of the

building must have provision to

terminate flow independently, sufficient

to allow for different operating times

Compliant Motorised dampers not provided to

every riser take-off at every floor

served for the hotel tempered outside

air supply. The outside air balances the

toilet exhaust to the hotel rooms. The

dampers would be required to shut

when the given floor is unoccupied.

All floors considered occupied

The current hotel central toilet exhaust

system does not allow for shut off to

individual floors. The assumption

made for hotels is that all floors are

considered occupied (although there

will be individual unoccupied rooms),

thus toilet exhaust will be running for

each floor, and make up air (via

outside air) is required to satisfy Part

F4.

Have automatic variable temperature

operation of heated and chilled water

circuits

Compliant N/A

Motorised outside air and return air

dampers must close if a system is

deactivated

Compliant N/A

Compliance must not hinder smoke

hazard management or ventilation

requirements

Compliant N/A

Have control sequences to prevent

operation of opposing heating and

cooling modes.

Compliant N/A


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COMPLIANCE

ASESSMENT

MODIFICATIONS

REQUIRED FOR

COMPLIANCE

Air conditioners >2kWr and heaters

>1kW must be provided with time

switch control. Control must be capable

of switching on/off electric power at

variable pre-programmed times and on

variable pre-programmed days.

Not applicable to a single sole-

occupancy unit with a Class 2, 3 or 9c

building, a Class 4 part of a building, or

24hr occupancies.

Compliant N/A

J5.3 Mechanical

Ventilation System

Control

A mechanical ventilation system must

be able to turn off when the served area

is unoccupied.

Compliant N/A

Either energy reclaiming systems as

required by Table J5.3 OR demand

controlled ventilation in accordance with

AS1668.2 will be provided

Compliant N/A

Exhaust systems with air flow rates of

more than 1000 L/s must be capable of

stopping the motor [except for a sole-

occupancy unit in a Class 2, 3, or 9c

building]

Compliant N/A

A time switch must be provided to

control a mechanical ventilation system

>1000 L/s

Compliant N/A

J5.4 Fan Systems[1] Fans >1000 L/s must be provided with

variable speed control

Non-Compliant GEF-CO-29.01 (3000L/s) Lift Motor

Room will require fan with VSD

Fans must operate at an efficiency

greater than or equal to the formula in

J5.4(b)

Potential

Compliance

Refer to appendix. Actual fan

efficiencies of installed models

unknown. Several new fan selections

were made to check possible

compliance. Shop drawing from

contractor required to confirm

compliance

Average pressure drop in the longest run

of all straight sections of rigid ductwork

must not exceed an average of 1 Pa/m

Compliant N/A


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COMPLIANCE

ASESSMENT

MODIFICATIONS

REQUIRED FOR

COMPLIANCE

Pressure drop across coils and filters

must not exceed values as per Table

J5.4d, Table J5.4e

Potential

Compliance

Specification states air pressure drop

not exceeding 100Pa for hot water

heating coils. Final equipment

selection required to confirm

compliance

Airside components may not exceed

pressure drops as specified

Potential

Compliance

Final airside component schedule and

shop drawings required to confirm

compliance

J5.5 Ductwork

Insulation

Ductwork must be insulated as per Table

J5.5.

(include in appendix)

Compliant N/A

J5.6 Ductwork

Sealing

Ductwork must be sealed in compliance

with AS 4254 parts 1 and 2

Compliant N/A

J5.7 Pumps Pumps must operate at an efficiency

greater than or equal to the formula in

J5.7(c)

Potential

Compliance

Design operating head of pumps and

final pump selection by Contractor

required to perform calculation of

minimum required pump efficiency.

Pipework must not exceed pressure

drops nominated in Table J5.7b thru

J5.7e.

Non-Compliant Specification allows for maximum

pressure drop of 600 Pa/m and 2.5 m/s.

Some pipework will need to be

upsized to reduce pressure drops of

straight length piping.

J5.8 Pipework

Insulation

Piping must be insulated as per Table

J5.8a.

Non-Compliant High temperature refrigerant piping

and heating hot water piping will need

to be nominally tripled in thickness.

J5.9 Space Heating Electric heaters must be in compliance

with Table J5.9

N/A N/A

Water heaters in air conditioning system

must:

if rated to consume 500 MJ/hour of

gas or less, achieve a minimum

gross thermal efficiency of 86%; or

if rated to consume more than 500

MJ/hour of gas, achieve a minimum

gross thermal efficiency of 90%.

Compliant N/A


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COMPLIANCE

ASESSMENT

MODIFICATIONS

REQUIRED FOR

COMPLIANCE

J5.10 Refrigerant

Chillers

Chillers must be in compliance with

energy efficiencies specified in Table

J5.10a and b.

Compliant Water cooled chillers compliant based

on current chiller schedule. subject to

final selection by Contractor

J5.11 Packaged air-

conditioning

equipment

Packaged air conditioners 65kWr,

minimum energy efficiency ratio of 4.0

for water cooled equipment and 2.9 for

air cooled equipment.

Compliant N/A

J5.12 Fan motor power of cooling towers,

evaporative condensers, or closed circuit

coolers must not exceed allowances in

Table J5.12

Potential

Compliance

Fan motor power not indicated on

specification schedule. Compliance

subject to final cooling tower &

evaporative condenser selection by

Contractor.

[1] Fan systems and airside components can be designed to achieve compliance during the design phase. However, thefinal equipment will be selected and installed by the Contractor during construction phase. Contractors will need to

confirm compliance based on actual equipment installed.


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2.4 PART J6: ARTIFICIAL LIGHTING AND POWER

The following documents have been referenced to assess compliance with the NCC 2016 and 2019.

Collins Arch Specialist lighting drawings and schedules, dated May 2017 through to January 2018

Collins Arch lighting schedules and drawings Design Development Tender issue, dated December 2016

Only discreet lighting areas were assessed against Part J. These included areas with Architectural Lighting considered

the most likely to fail compliance. We understand that when implemented, the NCC 2019 proposed clauses J6.2 a and b,

can be area-weighted over the entire development. The following table describes the key information within these

documents which refer to the NCC and non-compliances to the DTS which have been found. Refer to Appendix D for

the lighting power assessment in the selected spaces

NCC 2019

RELEVANT

CLAUSES

NCC 2016 COMPLIANCE NON-COMPLIANCES TO THE NCC 2019

J6.2 Table 6.2a

J6.2 Table 6.2b

J6.2 Table 6.2c

J6.3f

J6.3g

J6.3h

J6.7

Spec J6.4b (v)

J8.3c

Compliant No non-compliance of lighting power density

for the following space types tested:

- Hotel Lobby

- Hotel Standard room

- Commercial Lobby

For further calculations refer to Appendix D to see a comparison of LPD (lighting power density) for 447 Collins Street.

2.5 J6.7/8 LIFTS/ESCALATORS AND MOVING WALKWAYS

A total of 25 lifts and 1 dumb waiter that are present in the building.

The NCC 2016 contained no requirements for lifts/escalators and moving walkways, therefore the table below describes

the compliance with the 2019 provisions.

NCC 2019 CLAUSE COMMENT

J6.7 (a) lifts must be configured to ensure artificial lighting

and ventilation in the car are turned off when it is unused

for 15 minutes.

Compliant. Specification requires lighting and ventilation

to automatically switch off 5 minutes after last run.

J6.7 (b) idle and standby energy performance Not explicitly specified however the selected equipment is

expected to be Compliant

J6.7 (c) energy efficiency class Not explicitly specified however the selected equipment is

expected to be Compliant

A total of 4 escalators are present in the building.


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J68 (a) Escalators must slow to between 0.2m/s and

0.05m/s when unused for 15 minutes.

The slow down speed not explicitly specified however the

variable speed drive and control strategy for slow down is

specified therefore the selected equipment is expected to be

Compliant or able to be compliant at no cost.

2.6 PART J7: HEATED WATER SUPPLY AND SWIMMING

POOL AND SPA POOL PLANT

There are two swimming pools present in the building. One for the hotel, and one for the residential apartments.


J7.3 (a) heating source for pool Compliant. Gas fired boiler of sufficient efficiency

specified.

J7.3 (b) heat loss reduction. A pool cover and time switch

on heating source required.

To be confirmed.

J7.3 (c) time switch on circulation pump To be confirmed.

J7.3 (e) programmable time switch where required. To be confirmed.

J7.3 (f) pipework insulation To be confirmed

2.7 OTHER MEASURES INFLUENCING NCC COMPLIANCE

In order to achieve compliance with the proposed requirements Section J of the NCC 2019, some changes need to be

made to the HVAC and Ventilation systems. Many of these changes are related to sizing of plant and equipment.

Although theoretically these changes can be made, it would require significant coordination work with the architect and

other disciplines and there is no guarantee that the spatial requirements would be able to be accommodated.


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3 SIMULATION PARAMETERSIn order to confirm compliance with the draft provisions for NCC 2019 Section J a JV3 an energy simulation wasperformed to compare the proposed compliant design against a reference design determined using the DTS provisions

identified in NCC 2019. These simulations were based on the following parameters

3.1 WEATHER FILE

To accurately model the dynamic nature of buildings thermal response, hourly-recorded weather data is used in the

thermal simulation. Such weather data contains records of radiation, temperature, humidity, sunshine duration and

additionally wind speed and direction.

A Test Reference Year for Melbourne has been used for this study; chosen using an ASHRAE approved procedure. ATest Reference Year is hourly weather data for a year for use in simulation of the performance of active and passive solar

energy systems, building energy consumption and indoor climate calculations.

The Validation Protocol states that ACADS-BSG/CSIRO weather data is acceptable. Both ASHRAE and CSIRO procedures use the same weather information and calculations to produce a test reference year. Therefore, the ASHRAE

test reference years is equivalent to the ACADS-BSG/CSIRO test reference year and meets the requirements.

3.2 BUILDING LOADS

Building loads determine the heating and cooling requirements of a building. They come from sources such as occupants,

equipment, lighting and solar loads. The internal loads; occupant, lighting and equipment loads, are detailed below in

Table 3.1, Table 3.2 and

Table 3.3 with values and profiles taken from design team specifications and NCC 2019.

Table 3.1 Internal Loads

INTERNAL HEAT GAINS PARAMETER

Lighting heat gain Table 3.3 of this report

Equipment heat gain Table 3.3 of this report

Building Occupancy Table 3.3 of this report

Outside Air 10L/s/person

Occupant sensible gain 80 W/person in dining zones

75 W/person in other zones

Occupant latent gain 80 W/person in dining zones

55 W/person in other zones

Table 3.2 Air Conditioning Set Points and Infiltration Levels

INFILTRATION AND AIR CONDITIONING PARAMETER

Infiltration HVAC on 0.35 ACH for all zones while conditioned

0.70 ACH for all zones while unconditioned

AC temperature bands Dry Bulb 23C 1.5C


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Table 3.3 Nominal Occupancy, Lighting and Equipment Loads for each Zone

ZONE OPERATING PROFILES OCCUPANCY

(m2/person)

LIGHTING

(W/m2)

EQUIPMENT

(W/m2 sensible)

Unconditioned None 0 0 0

Class 5: Office NCC 2019 JVc Table 2b and 2c 10 4.5 11.0

Retail Tenancies NCC 2019 JVc Table 2 3 16 5

Restaurant NCC 2019 JVc Table 2 1 6 5

Hotel Amenities As per design team specifications 1.5 10 0

Class 3 Hotel Guest Rooms NCC 2019 JVc Table 2 15 2.5 3.5

Circulation As per design team specifications 30 2.5 2.0

Food Preparation As per design team specifications 10 4.0 5.0

Lounge As per design team specifications 2 3.0 5.0

Reception NCC 2019 JVc Table 2b 30 4.5 11.0

3.3 BUILDING GEOMETRY

The building geometry for both the NCC 2019 reference model simulation and NCC 2019 JV3 compliant model

simulation were based on the architectural design documents seen in Appendix B. The reference and proposed case

included the shading that was a fixed part of the structural design as indicated below in Figure 3.1.


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Figure 3.1 Image of the NCC 2019 reference model geometry


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4 SIMULATION RESULTS FOR

PERFORMANCE BASED CASEA building simulation was prepared for both NCC 2016 compliance through verification method JV3 and for a 5 Star

Green Star Design & As Built rating.

The simulation was performed for both JV3 compliance and the Green Star assessment using EDSL TAS 9.3.3; an EN

ISO 13791 validated dynamic simulation modelling (DSM) software tool using a TRY (Test Reference Year) weather

file of Melbourne . The Green Star assessment also involved further additional calculations of energy use estimated through hand calculations.

A comparison of this simulation against the JV3 assessment results for NCC 2019 are shown below in Table 4.1

indicating the greenhouse gas reduction for the proposed fabric against the reference model with DTS services.

Table 4.1 Collins Arch Development - Hotel - Simulation Results Comparison

GREEN STAR DESIGN & AS-

BUILT RESULTS

NCC 2019 JV3 RESULTS FUEL

TYPE

PROPOSED

Annual

Consumption

STANDARD

Annual

Consumption

PROPOSED

Fabric + DTS

Services Annual

Consumption

NCC 2019 DTS

Fabric + Services

Annual

Consumption

Percentage

Difference

HVAC Heating

(simulated)5,425,090MJ/yr 2,669,080 MJ/yr 2,971,989MJ/yr 3,063,198MJ/yr +3%

Natural

gas

HVAC Cooling

(simulated)114,869 kWh/yr 211,194 kWh/yr 38,449 kWh/yr 25,657 kWh/yr -33% Electricity

Lighting

(hand calculation)178,546 kWh/yr 576,426 kWh/yr 39,711 kWh 79,271kWh +50% Electricity

Domestic Hot Water

(hand calculation)1,855,134 MJ/yr 1,924,188 MJ/yr Not assessed Not assessed

Natural

gas

Mechanical exhaust

(hand calculation)208,204 kWh/yr 277,254 kWh/yr Not Assessed Not Assessed Electricity

Lifts

(hand calculation)172,417 kWh/yr 162,893 kWh/yr Not assessed Not assessed Electricity

External Lighting


TOTAL4,345,532 MJ/yr

952,585 kWh/yr

4,905,436 MJ/yr

1,866,946 kWh/yr

2,971,989 MJ/yr

78,160 kWh/yr

3,063,198 MJ/yr

104,928 kWh/yr-

Natural

gas

Electricity

TOTAL GHG

Emission -kg CO2 599,067,813 642,549,190 178,939,393 192,472,930 7%

Natural

Gas /

Electricity


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Note, the results for both simulations use distinct modelling criteria. Further, the NCC 2019 JV3 are using DTS services

provisions in their calculations and the Green Star energy results are for a design rating using tender documentation.

Table 4.2 Collins Arch Commercial Simulation Results Comparison

GREEN STAR DESIGN & AS-

BUILT RESULTS

NCC 2019 JV3 RESULTS FUEL

TYPE

PROPOSED

Annual

Consumption

STANDARD

Annual

Consumption

PROPOSED

Fabric + DTS

Services Annual

Consumption

NCC 2019 DTS

Fabric + Services

Annual

Consumption

Percentage

Difference

HVAC Heating

(simulated)3,673,771 MJ/yr 4,148,693 MJ/yr 3,540,237 MJ/yr 3,540,095 MJ/yr -0.004% Natural gas

HVAC Cooling

(simulated)138,195 kWh/yr 489,182 kWh/yr 105,313 kWh/yr 98,259 kWh/yr -7% Electricity

Lighting

(Internal and

External)

377,329 kWh/yr 825,730 kWh/yr 134,082 kWh/yr 184,465 kWh/yr +27% Electricity

Domestic Hot

Water

(hand calculation)

671,761 MJ/yr 756,743 MJ/yr Not assessed Not assessed Natural gas

Mechanical

exhaust

(hand calculation)

208,204 kWh/yr 277,254 kWh/yr Not assessed Not assessed Electricity

Lifts


TOTAL 4,345,532 MJ/yr

1,370,484 kWh/yr

4,905,436MJ/yr

2,635,308kWh/yr

3,540,237 MJ/yr

239,395 kWh/yr

3,645,550 MJ/yr

282,724 kWh/yr

Natural gas

Electricity

TOTAL GHG

Emissions -

kgCO2

676,184,984 1,122,428,757 259,093,784 278,055,0787%

improvement

Natural

Gas /

Electricity


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4.1 THERMAL COMFORT ASSESSMENT.

A thermal modelling assessment has been performed for Collins Arch to assess the thermal comfort performance of the

building. The assessment was conducted in compliance with proposed NCC 2019 Section J verification method JV3.

The results show that most zones have a PMV compliant with the boundaries set forth in Credit 14.1 Thermal Comfort

(-1 and +1 ) from Green Star Design & As-Built v1.1 were maintained for 98% of the occupied hours of the year over

98% of the occupied floor area as shown in the following table. The only non compliant spaces are the pool areas.

Table 4.3 Thermal Comfort PMV Results Hotel

OCCUPIED ZONE FLOOR AREA COMPLIANT

AREA

PERCENTAGE OF THE

YEAR WITHIN A PMV

OF -1 AND +1

PMV

COMPLIANT

Ground Floor Restaurant areas 684m2 648 99% Yes

Ground Floor Kitchen areas 178 178 99% Yes

Ground Floor - Ballroom 497 497 100% Yes

Ground Floor / Level 1 Function

Rooms

513 513 100% Yes

Level 2 Hotel Keys

(Representative of floors 4-10)

5127 5127 100% Yes

Level 3 Hotel Keys 930 930 100% Yes

Level 12 Hotel Keys

(Representative of level 11)

951 951 100% Yes



Level 15 - Amenities (Pool,) 251 126 100% Yes

Level 15 Amenities (Treatment

Rooms, Gym)

303 303 100% Yes

Total Floor Area 10,594m2

Percentage of Total Floor Area with Compliant Annual PMV Results 98%


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The results show that most zones have a PMV compliant with the boundaries set forth in Credit 14.1 Thermal Comfort

(-1 and +1 ) from Green Star Design & As-Built v1.1 were maintained for 98% of the occupied hours of the year over

98% of the occupied floor area as shown in the following table.

Table 4.3 Thermal Comfort PMV Results Office

OCCUPIED ZONE FLOOR AREA PERCENTAGE OF

OCCUPIED FLOOR

AREA

PERCENTAGE OF

THE YEAR WITHIN A

PMV OF -1 AND +1

PMV

COMPLIANT

Mezzanine BOH

Lunchroom, Security

Office

23m2 100% 100% Yes

Collins Street

Building Management

Office and Reception

179m2 70% 100% Yes

Level 4 Office NLA 7,837m2 100% 100% Yes



Flinders Lane Retail

Tenancy

146.5m2 0% 88.35% No

Collins St - Retail

Tenancy

467m2 21% 92% No

L1 Retail Tenancy 253m 100% 100% Yes

Total Floor Area 46,915m2

Percentage of Total Floor Area with Compliant Annual PMV Results 98.15%


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5 ECONOMIC ANALYSISA high level economic analysis of the design changes required to meet compliance with the proposed provisions of

Section of the NCC 2019.

5.1 BUILDING FABRIC AND GLAZING

The assessment of the provisions in relation to the building has found that the building fabric and glazing as per the

current design is deemed compliant via Verification method JV3. Therefore no changes to the building fabric or glazing

is required.

5.2 MECHANICAL SERVICES

The assessment of the mechanical systems design has found that changes would need to be made to the following

elements. A high level estimate of the cost impact is provided.

ITEM DETAIL INDICATIVE 2016

COMPLIANT COST

INDICATIVE 2019

COMPLIANT COST

Dampers Motorised dampers would be

needed to be added at every

riser take-off at every floor.

The tempered outside air to

the hotel does not include

motorised dampers. As this

balances the toilet exhaust,

we believe that dampers

would not be required.

Nil

Fans Fan selections may need to

be adjusted to ensure

compliance

Nominal cost difference

Fans - VSDs GEF-CO-29.01 (3000L/s)

serving the Lift Motor room

will require a VSD

Nominal cost difference

Pipework Some pipework will need to

be upsized to reduce

pressure drops of straight

length piping

Nominal cost difference. Coordination issue

Pipe insulation High temperature refrigerant

piping and heating hot water

piping will need to be

nominally doubled in

thickness.

Piping insulation is expected to increase from

approximately $8/m to $30/m

Total cost difference Dependent on length of piping


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The cost difference of the design changes nominated above is expected to be nominal as it is related to the piping

insulation only.

5.3 ELECTRICAL SERVICES

A number of tested areas did not satisfy the proposed 2019 lighting power density requirements. If these non-

compliances could not be carried by the remainder of compliant spaces over the entire development, then the lighting

density would need to be reduced. On this project, the net cost result is likely to be a minor saving. There would be

anticipated to be greater consultancy costs associated with developing solutions that meet compliances, however if the

solution requires fewer lights, then the installation costs will likely reduce.


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6 CONCLUSIONSIn order to comply with the Draft Section J Requirements for NCC 2019 through verification method JV3 no items were


In order to achieve compliance with the proposed requirements Section J of the NCC 2019, some minor changes need to

be made to the HVAC and Ventilation systems. This includes doubling the thickness of refrigeration and heating hot

water pipes. Although theoretically these changes can be made, it would require significant coordination work with the

architect and other disciplines and there is no guarantee that the spatial requirements would be able to be accommodated.

The lighting design for the Collins Arch project was found to be compliant with the proposed requirements of 2019 with

the exception of the lighting power density in the hotel and commercial lobbies and hotel standard rooms. Compliance

could be achieved in this instance through reducing the lighting installed and no cost addition would be expected,

however the amenity of the spaces may be impacted.

The lifts proposed for the building are expected to be compliant with the 2019 requirements.

The building and services were found to be generally in accordance with the new provisions of Section J of the NCC

2019. Minimal cost impact is expected to make minor changes to the systems design to meet the more prescriptive

provisions of Parts J5 and J6.


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7 COMMENTARY ON THE NEW

SECTION J PROVISIONS 2019

7.1 PARTS J1-J2 BUILDING FABRIC

The following items are general concerns on wording and clarity that we believe should be incorporated into the code.

SECTION COMMENT RECOMMENDED RESOLUTION

Wall-glazing construction

J1.5 (d) (iii)

Doesnt clearly indicate that these

are wall only R-Value

requirements and whether they

apply to the total wall for each

level and orientation or for each

wall element.

Indicate whether this is a wall only value

and whether it should be a minimum for

each wall element or an average for each

level and orientation.


J1.5

No worked example for

calculating thermal resistance

values of entire facades. This

could be a source of confusion as a

faade with 50% at R1 and 50% at

R2 is total R1.33.

Provide a worked example on how to sum

R/U-values and SHGCs for a faade in

order to provide clarity.


J1.5 (d) (ii)

Lack of precise description of

used to display retail goods in a

shop or showroom has potential

to reduce stringency to all retail

buildings.

Provide a clear definition of this term

including the maximum level of

occupancy required (if any) for this term to

applicable to a project.


J1.5

Division of requirements for

specific class types only ignores

the extra thermal requirements of

overnight operating buildings in

classes other than Class 3 or 9c

building or a Class 9a ward area.

Recommend returning to a previous issued

draft distinction of the two provisions

which divided the buildings based upon

hours of overnight use.

Specification JVc

Table 2d

Believed typographic error in

current draft issued has air-

conditioning profile at 25%

between 12am and 7am.

Return this profile to Off during these

time periods.


J1.5, and,

Floors

J1.6 Table J1.6

CIBSE Guide A Section 3.5

includes calculations for basement

floors and (retaining) walls

Indicate whether the CIBSE method

should be applied to envelope elements in

contact with earth, specifically basement

floors.

Also would be desirable to indicate the

method of calculating the R-values of


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basement and retaining wall elements as

Section 3.5 also includes a calculation

method for basement walls.

7.2 PART J5 MECHANICAL SERVICES

This section intends to highlight the major positive and negative impacts of the NCC 2019 founded upon the results of

this case study.

- Positives

o J3.5(c) Allows building designers to enforce contractors to adhere to good building practices in regardto building sealing.

o J5.2(a)(iii) An improvement to the original criteria for economy cycles; however, could use more

clarification on what consists of an airside component of an air-conditioning system. i.e. do all the

FCU airflows added together entail an air-conditioning system, or do they only need to be considered

individually.

o J5.2(a)(x) Provides a low cost high impact solution for this project to allow for energy efficiency

opportunities if only one level of the building is being used outside of normal operating hours. It helps

ensure energy use during after-hours operation is kept to a minimum.

o J5.4(b) Provides a path to fan compliance for a variety of real world applications. The NCC2016 was

not friendly to fan selections in high pressure applications because efficiencies are measure in W/L/s,

regardless of pressure drop. The NCC2019 simply requires a motor efficiency. In this case study, the

kitchen exhaust fans were assumed to be non-compliant; however, these fans would become compliant

under the new requirements. Refer to appendix for more information.

o J5.7(c) Refer to J5.4(b).

- Negatives

o J5.4(b) The methodology for calculating fan efficiencies required is tedious, and requires a selection

before checking compliance. Therefore, the current process of selecting a fan is iterative. This process

could be made easier through manufacturer software integration. Checking compliance is one of the

most difficult aspects because a fan efficiency needs to be provided. Commonly, efficiencies arent listedon schedules, and not all manufacturers provide efficiencies in selections. If checking compliance is notmade simple, there is a risk this section of the code could be overlooked.

o J5.4(c) & J5.4(d) Requiring a designer to meet specific pressure drop requirements restricts design

flexibility whilst not necessarily increasing overall building efficiency. Whilst the specified pressure

drops are in-line with good industry practice, there are times where components would need to exceed

the limitations for practical reasons (i.e. spatial issues, cost). It may be more beneficial to shift this

part of the code to the Australian Standards to be enforced as guidelines.

o J5.7(c) Refer to J5.4(b).

o Table J5.8(a) The piping insulation requirements for pipework between 30C and 85C (typical

heating hot water and refrigerant systems) has nearly tripled in R-value. Small refrigerant piping and

branch piping to hot water coils would need to increase significantly in size, potentially from 25mm to

75mm. This increase could potentially triple the pipework insulation cost, and it will greatly impact on

ceiling void coordination. Whilst this increase strives for energy efficiency improvements, it may not bepractically realised in a real world installation. The theoretical losses from the current insulation

requirements are low enough such that temperature drops through a system are considered negligible.


WSP February 2018

Page 38

7.3 PART J6 ELECTRICAL SERVICES

The more stringent lighting illumination power density requirements proposed for the 2019 amendment appear adequate

for functional lighting for the areas that have been tested. The spaces tested for this case study showed non-compliances

for areas subject to a focus on architectural lighting. The proposed calculation methodology and illumination power

density limits will impact the ability to implement architectural lighting outcomes. As an area-weighted calculation

allowing some areas to exceed the power density limits over an entire project, there will be the ability to employ

architectural lighting solutions in select and limited areas on projects.

The architectural lighting tested for the hotel included floor level, wall panel and ceiling illumination in the hotel foyer,

and in the hotel rooms, the lighting included lamps, and display lighting that can be controlled by the lighting control

system. Some potential perverse outcomes of a more stringent lighting limit may include lamps being powered from

GPOs (not controlled), and vertical panel lighting treated as signage and similarly not as well integrated into the lighting

control system.

BUILDING FABRIC PARAMETER

COMPARISON

Project No MEL1404400 NCC 2019 Section J Revisions

Case Study: Collins Arch Development - 447 Collins Street, Melbourne ABCB

WSP February 2018

Page A-1

A1 NCC 2016 AND 2019 PARAMETER COMPARISON

BUILDING

ELEMENT

NCC 2016 DTS

REQUIREMENTS

COMPLIANCE

PATHWAY

NCC 2016 PROPOSED

PARAMETERS

NCC 2019 DTS REQUIREMENTS AND

DESIGN

COMPLIANCE

PATHWAY

NCC 2019

PROPOSED

PARAMETERS

Building

fabric

roof (J1.3)

NCC 2016 calculation

R value: 3.20 m2.K/W

U value: 0.31 W/m2.K

Solar Absorptance:

0.40

JV3 NCC 2016 calculation






Solar Absorptance: 0.40





JV3 As per NCC 2016

proposed design

Building

fabric

wall (J1.5)

External walls


R value: 2.8 m2.K/W


Solar Absorptance:

0.60

JV3 External walls





R value: 2.5 m2.K/W



Wall-glazing

requirements

and compliant

design

WWR 20%

NCC 2019

calculation

R value: 0.50

m2.K/W

U value: 2.00

W/m2.K

WWR 20%

NCC 2019

calculation

R value: 1.4

m2.K/W

Wall only compliant

design

Lower Basement

WWR 20%







All Other Levels and

Faades

WWR 20%

JV3 New Calculation

Method:

Total System Wall-

Glazing Parameters

U value: 1.35 4.11

W/m2.kSHGC: 0.06 0.22

WWR: 0% 98%

(Orientation dependant)

Internal envelope

walls


R value: 1.8 m2.K/W


Internal envelope walls

R value: No insulation added

U value: No insulation added

Estimated average values




WSP February 2018

Page A-2

BUILDING

ELEMENT

NCC 2016 DTS

REQUIREMENTS

COMPLIANCE

PATHWAY

NCC 2016 PROPOSED

PARAMETERS


DESIGN

COMPLIANCE

PATHWAY

NCC 2019

PROPOSED

PARAMETERS






U value: 0.71

W/m2.K

SHGC: 0.13

Solar

Absorptance:

0.60

Wall only

minimum

requirements

WWR 20%

R value: 1.00

m2.K/W

U value: 1.00

W/m2.K


R value: 2.8 m2.K/W






Floor (J1.6) Slab on ground

R value: No

requirement

U value: No

requirement

JV3 Slab on ground






ignoring effect of adjacent ground




JV3 New Calculation

Method:

Basement Floor


R-Value: 2.3 m2.K/W

Slab on Ground


R-Value: 2.1 m2.K/W

Suspended Floor

U Value: 2.5 W/m2.K

R-Value: 0.4 m2.K/W



WSP February 2018

Page A-3

BUILDING

ELEMENT

NCC 2016 DTS

REQUIREMENTS

COMPLIANCE

PATHWAY

NCC 2016 PROPOSED

PARAMETERS


DESIGN

COMPLIANCE

PATHWAY

NCC 2019

PROPOSED

PARAMETERS

Suspended slab




Suspended slab






As per NCC 2016

proposed design

Glazing

(J2)

Determined using NCC

2016 Glazing

Calculators

JV3 Mid Pane



SHGC: 0.28

Whole of System

R-Value: 0.24 m2.K/W

U-Value: 4.2 W/m2.K

SHGC: 0.25

As Building fabric wall (J1.5) above JV3 As per NCC 2016

proposed design



WSP February 2018

Page A-4

A2 FAADE WINDOW TO WALL RATIOS

LEVEL EASTERN FAADE NORTHERN FAADE SOUTHERN FAADE WESTERN FAADE

Hotel Commercial Hotel Commercial Hotel Commercial Hotel Commercial

Lower Basement 1

- 50% 0% 0% 0%

Podium Level 0.3

Collins St61% 62% 54% 68%

Podium Level 0.2

Williams St- - 100% -

Podium Level 0.1

Flinders Lane32% 52% 56% 53%

Ground Floor 54% N/a 78% N/a 73% N/a 70% N/a

Level 01 35% N/a 78% N/a 64% N/a 41% N/a

Level 02 77% N/a 61% N/a 61% N/a 52% N/a

Level 03 71% N/a 77% N/a 77% N/a 43% N/a

Level 4 Representative

of Level 3

52% Representative of

Level 3


Level 3


Level 3

82%

Level 11 Representative

of Level 3


Level 3


Level 3


Level 3

82%



WSP February 2018

Page A-5

Level 1271%

Representative of

Level 1177%

Representative of

Level 1177%

Representative of

Level 1143%

Representative of

Level 11

Level 1367%

Representative of

Level 11N/a

Representative of

Level 1179%

Representative of

Level 1122%

Representative of

Level 11

Level 1484%

Representative of

Level 1195%

Representative of

Level 1197%

Representative of

Level 1120%

Representative of

Level 11

Level 1584%

Representative of

Level 1195%

Representative of

Level 1197%

Representative of

Level 1120%

Representative of

Level 11

Level 25 N/a 53% N/a 82% N/a 67% N/a 83%

ARCHITECTURAL DRAWINGS

C O L L I N

S S T R E

E T

F L I N D E R

S L A N E

W I L L I A M S T R E E T

M A R K E T S T R E E T

SUBJECT SITE

RL 14.70

RL 9.24

RL 8.98

RL 14.69 15844' 83.70

33833'40" 83.61

24839' 70

.72

6834'40"

70.97

COLLINS STREETEAST

RESIDENTIALTOWER

COLLINSSTREET WESTRESIDENTIAL

TOWER

433439

COLLINS STREETCOMMERCIAL TOWER

447

COLLINS STREETHOTEL

435

459 COLLINS STMLC TOWER

CHALLENGE TOWER

35 WILLIAMS ST

22 WILLIAMS STSWANN HOUSE

405 - 411 FLINDERS LNTHE PORT APARTMENTS

389 FLINDERS LNMINTER ELLISON

BUILDING

HOLYMAN HOUSE

IMMIGRATION MUSEUM

42-52 MARKET STTREASURY FUNDS

HOUSE(16 STOREYS)

60 MARKET STOAKS ON MARKET

(25 STOREYS)

425 COLLINS STTRUSTEES HOUSE

(9 STOREYS)

422 COLLINS STTEMPLE COURT

GURNERS LANE

454COLLINS

ST

450COLLINS

ST

440 COLLINS ST

412COLLINS

ST

462 COLLINS ST464-466COLLINS ST

470 COLLINS ST

480 COLLINS ST

459 - 469 COLLINS ST

471 FLINDERS LN

P.O.S.

COLLINS STREETHOTEL

435

COMMER

CIAL

ENTRY

RE

SID

ENTIA

L

ENTR

Y

RE

SID

ENTIA

L

ENTR

Y

MA

RK

ET ST

AM

PITH

EA

TRE

FLINDER

S LN

LINK ST

AIR

HOTEL

ENTRY

HOTEL

ENTRY

VEHICU

LAR

PARKIN

G

ENTRY

WILLIA

M S

T

LINK

STAIR

HOTEL

ENTRY

LOADIN

G

ENTRY

EO

T

BIC

YCLE

ENTR

Y

Date generated

Revision

Status

Sheet number

Sheet title

Scale

Project number

Checked Approved

25mm

Sheet sizeA0

Issuer

Size check

Project

Client

Woods Bagot

TM

# Description DateStatusRecent revision history

A00 - GENERALA10 - EX. CONDITIONS AND DEMOLITIONA11 - SITE PLANSA12 - REFERENCE PLANSA21 - STRUCTURAL SETOUTA22 - FLOOR PLANSA24 - REFLECTED CEILING PLANSA32 - ELEVATIONSA33 - SECTIONSA41 - DETAIL STRUCTURAL SETOUTA42 - DETAIL ENVELOPE SETOUTA43 - DETAIL INTERNAL ARRANGEMENTSA44 - STAIRS AND CONNECTING ELEMENTSA45 - DETAIL APARTMENT LAYOUTSA46 - DETAIL WET AREASA47 - DETAIL LIFT CARSA51 - STRUCTURAL SETOUT DETAILSA52 - CONSTRUCTION ENVELOPE DETAILSA53 - CONSTRUCTION FITOUT DETAILSA60 - WINDOWS SCHEDULEA61 - LOUVRES SCHEDULEA62 - DOORS SCHEDULEA70 - JOINERY & FITTINGSA74 - LINE OF HEIGHTSA90 - FINISHES BOARDSA91 - RENDERS

DRAWING SERIES

Contractor must verify all dimensions on site before commencing workor preparing shop drawings. Do not scale drawings.

Notes & Legend

DRAWING NUMBERING CONVENTIONEXAMPLE:

A - 22 2 14

ARCHITECTURALDRAWING SERIESSEQUENCING NUMBERSTRATA / SUB CATEGORY

C:\My Documents\Autodesk\Revit\RAC2016\130186_447C_ARCH_CENTRAL_melblp.rvt6-01-17 3:36:45 PM

A

1 : 400

FOR TENDER

130186

WB/SHoP WB/SHoP

CBUS PROPERTY

433 - 455 COLLINS STREET

A-11001

SITE PLANOVERALL

A 80% DD / TENDER ISSUE 06/01/17

CC

BB

17 15 13 11 9 7 5 3

10

DD

FF

81214 4 2

1

1

1A-33104

1A-33104

616

AA

1A-33003

1A-33003

2A-33103

2A-33103

1A-33102

1A-33102

Da

Ea

EE

1A-33101

1A-33101

TITLE

BOU

NDAR

Y

TITLE BOUNDARY

TITLE BOUNDARY

TITL

E BO

UNDA

RY

OFFICE + RETAILRECYCLING

12.5m DIAMETERTRUCK TURNTABLE

CARPARK RAMP 1:5.1THRU TO RESI & COM CAR PARKS

RAMP 1:9

RAMP1:20

TRUCK WAITING BAY AREA

WASTE COLLECTION DOCKS

LOADING DOCKSUNLOADING

ZONE

HOTEL RECYCLING HOTEL GENERALWASTE

8.8m TRUCKBAY

COMM. &RETAIL LOADING(OFFICE TITLE)

HOTEL LOADING

RESIDENTIAL LOADING

COURIER ANDMAIL VAN BAY

TRUCK ROUTE

HARDRUBBISHCAGES