Daikin Presentation -VRV Technology

8/10/2019 Daikin Presentation -VRV Technology

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Muralidhar Katari

Daikin Air conditioning India Pvt. Ltd.

October 30, 2014

Energy Efficiency Summit

HyderabadLatest developments in VRV

Technology

1

2

What About Efficiency?

Typical energy consumption in office building

Air

Conditioning

47%

Comp.

20%Heat

transfer

27.2%

Other utilities

20.5%

Lighting

32.3%

AC consumption reduction is

prime target of energy

saving

47% of electricity is

consumed by AC

How does it possible to achieve energy saving and

comfort simultaneously?

Energy saving Comfort


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This is the time to increase our efforts towards

Strengthen Green Building Movement

More energy efficient methods of operations

High energy efficient products

Habit of Energy Conservation

Best utilization of available Energy Resources.

We are pioneering the movement with a large array of

energy efficient products

Central Controller

Project Name

Location

BLD. Type

Size of Project

The Size of Bldg

Uniqueness

CRISIL House

Mumbai, India

Official Building

9 Floors

ODU - 73 No., HP1,092VRVIII (Air Cooled)

I-Manager

Green building project =>With Platinum rating

Design by Team of

leading Architectural andHVAC Consultancy

organisations.

LEED certifiedPlatinum rating

Air-cooled VRV Project withLEED Platinum Certification

4


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Water-cooled VRVProject withLEED Platinum Certification


Project Name

Location

BLD. Type

Size of Project

Central Controller

The Size of Bldg

Uniqueness

Suzlon

Pune, India

Official Building

8Blocks, 32 Floor

ODU - 134 No., HP1,392

VRVIII ( WC)

I-Manager & BACnet

Green building project =>Highest Platinum ratedbuilding in India

Appreciation letter fromcustomer for installation

and project management

5

LEED Platinum Certification

Kirloskar Brother Limited

Pune, India

Official Building

ODU - 69 No., HP704

Green building project =>Platinum rated building

1stReference Site of VRVWIII Awarded appreciation letter by

customer

G+ 3 Floor

Project Name

Location

BLD. Type

Aircond. Qty

Application

The Size of Bldg



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Discussion Topics

7

Energy & Atmosphere

- Efficiency of the system

- Environment friendly Refrigerant

Clean Project Management

-IAQ management plan

-Indoor environmental quality

Emerging Space conditioning technology;Variable Refrigerant Volume (VRV)

VRV Development

8


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9

Background of Development of VRV

1973Global oil crises (The 4th Arab-Israel War )

1979New energy efficiency laws passes in Japan

1980Chiller design engineers challenged with

making a higher efficiency chiller

1982The worlds first VRV System is launched

19741973

Crudeoilprice

Oil crisis

Energy saving

9

The 1st turning point

Inverter VRV!

Its design flexibility expanded sales volume

drastically.

0

1000

2000

3000

4000

5000

1998 1999 1990 1991

The 1stgeneration Inverter VRV G series

Non-inverter

VRV

Inverter VRV

Turning

Point10


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Technology Advancement

11

Standard compressors to variable speed scroll compressors

Direct driven outdoor fans to variable frequency drive,inverter-driven fans

Direct driven indoor coil motors to Inverter type motors

Performance difference between

1982 and 2014 model

1982 2014Energy Efficiency (COP) 2.78 4.30

Max. refrigerant piping length

difference between indoor &outdoor unit

70m 165m

Max. refrigerant piping height

difference between indoor &outdoor unit

30m 90m

Capacity rangeOutdoor unit 1015HP 4~60HP

Capacity rangeIndoor unit 2.5HP 0.8~20HP

Max. connectable indoor unitsnumber

6 units 64 units

Network control system None

-Intelligent touch Controller

-Intelligent Manager

-Intelligent touch Manager (~2012)

-BACNet interface

-LonWorks Interface

-Home Automation Interface (2012~)

- A/C Network Service System

Target project size Approx. 5,000m2 No limit

12


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Expansion of the country of sale

Sales is undergoing in more than 70 countries

ustria

Belgium

Bulgaria

Croatia

Cyprus

Czech

Finland

France

Germany

Greece

Serbia

Slovakia

Spain

Sweden

Switzerland

Turkey

UK

Ukraine

Hungary

Ireland

Italy

Lithuania

Macedonia

Netherlands

Poland

Portugal

Romania

Russia

lgeria

Burkina

Fas

o

Egypt

Ivory Coast

Senegal

South frica

Sudan

Bahrain

Jordan

Oman

Qatar

Saudi rabia

U E

China

Japan

Korea

Taiwan

Cambodia

Malaysia

Myanmar

Philippine

Singapore

Thailand

Vietnam

India

Maldives

Nepal

Seychelles

Sri Lanka

ustralia

Fiji

New Caledonia

New Zealand

Tahiti

Canada

Mexico

Puerto Rico

US

rgentina

Brazil

Panama

Peru

13

x 25!

Growth path experienced in all key VRV

markets

0

20

40

60

80

100

120

0 3 6 9 12 15 18 21 24 27 30 33

1. Tipping Point

2. High

Growth

3. Steady

Growth

Years after introduction

Japan

Australia

S. Korea

Singapore

Europe

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Energy: Efficiency of the system

15

VRV Architecture

16

Outdoor Unit

Indoor Units

Independent control of

each room and zones air

conditioning according to

thermal load.

Automatic control of

each indoor unit

Energy conservation.

Variable Refrigerant Volume


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Groundbreaking technology applied

to VRV

Compressor Variable speed inverter compressor

Scroll compressor with relief mechanism

Reluctance DC motor (IPMInner Permanent Magnet) synchronous motor)

Neodymium magnet

Sensor-less DC inverter

Sign wave inverter

Heat exchanger Sub cool circuit for longer piping

e-Pass cooling pipe location

Control system Hi-speed DIII protocol

Intelligent-Manager, Intelligent-touch-ControllerIntelligent-touch-Manager

BACNet Interface, LONWorks Interface

A/C Network Service System (AIRNET, Energy Saving AIRNET) 17

Reluctance

DC Motor

Scroll Type

Reluctance

Scroll Type

0.1

1

10

150 200 250 300 350 400 450 500

[J/kg]

[MPa]

R410A

-100 10

20 040 50

6 0 7 0 80 9 0 10 0

-20

-30

110120

Energy saving is achieved by:- Lowering condensing temperature

- Increasing evaporating temperature

Output current after correction

Sine-wave DCInverter Standard Inverter

Former Fan modelAero Spiral Fan

HighTemp.gas

D.I.S.O. CircuitTo compensate refrigerant flow velocityreduction caused by gas condensation, 2passes are combined into 1 restricted to 1.Heat exchange efficiency 11% UP

Heat exchanger

Aero Spiral Fan

Fan

Compressor

Essential technologies

Liquid

refrigerant

Enthalpy (Kcal/kg)

Pressure

(MPa)

18


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System Parts with built-in Inverters

The motor of the compressor, the heart of an

air conditioner, consumes most power.

PCB

INV

INV

INVINV

PCB

PCB

Outdoor unit

INV Inverter device

Compressormotor

Fan motor

Indoor unit fan motor

Air

Air Air

Electronic

expansion

valve motor

19

T1 = Refrigerant IN temp.

T2 = Refrigerant OUT temp.

T3 = Return air temp.

T4 = Set temp. of RC

According to the readings of 4 sensers, every 5 sec., CPU calculates optimum

capacity and adjusting EEV in PID (Propotional Integral & Derivative) action.

PID control ensures optimum comfort.

Suction

Discharge

Liquid

Gas

Electronicexpansion valve

Evaporator

T4

T1

T3

Fan

T2

CPU

RC

1 2 3 4

Condensing unit adjust the inverter

compressor to provide the required capacity

(Low or High)

Each indoor controls its capacity via

PID control and an E.E.V.

INDEPENDENT

BRAIN

System Capacity Control

20


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0

20

40

60

80

100

120

140

160

18 20 22 24 26 28 30 32 34 36 38 40 42 44 46

Quick and efficient traceability for the load fluctuationQuick capacity adjustment for changing load

Adjusting refrigerant flow

Partial load Performance

1

2

3

4

5

6

7

8

9

1

1 2 3 4 5 6 7 8 9 1 11 12 13 14 15 16 17 18 19 2 21 22 23 24

Daily occupancy ratioYearly Cooling hours

Design condition

Less than 10 hrs

In a year

Major operation

range : > 38C

Randomoccupancy

Ambient Temperature )Time

AC is selected for maximum load but operated under

fluctuating partial load almost all time

21

High Efficiency on Partial Load

22

COP

100%

4.0

4.5

5.0

5.5

6.0

6.5

7.0

20% 40% 60% 80%

Load Area

Cooling Load

Nominal COP*

* 8 HP

Cooling COP

Partial Load gives high efficiency , Most of the timebuilding run on partial Loads

COP = Cooling capacity /Power Input

6.6

4.3


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Operations as per building need

Precise Temperature Control

Consumes Energy as per cooling load

User benefit - User can save

energy by avoiding useless

operation

Individual Control

23

Inverter Technology

24

Stable temperature control by electronic expansion

valve and inverter compressor

30

25

20

15

10 20 30 40 50 60 70 Min.

RoomT

emp

erature

Set Temp.

Time

Automatically adjusts compressor speed to meet load

Strives to run long periods at very low speeds

Reduce cyclic losses

Improve temperature controls


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Latest Development

25

VRT Control

26

Innovative New Technology !

VRT VariableRefrigerantTemperature)

How can we achieve best performance in unstablecondition?

Targets Methods Results

Compressor

speed changeInverter

Ref. Volume

change

Evaporating

temp. changeVRT

Comp. Work

changeNew!

Cooling load is always changing


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VRT Control

27

Power consumption

Inverter

Reduction

Comp. Work (power consumption) reduction

Comp. Work

Comp. Work

V

Ref. Temp.

TC(Cond. Temp.)

TE(Eva. Temp.)

50% 100% Ref. flow

Reduction

VRT Control

28


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Because of smallerhigh & low pressure

difference!

ReasonHigher efficiency at cooling

C

t

y

VRT

Conventional A/C

R

E

e

m

p

oad

C

n

o

c

y

100%

25%

C

P

Outdoor

Temp

35 3 5

VRT

Conventional A/C

2.4 times stronger !

50% more

compression volume

High Efficiency Scroll compressor.

A 50% thinner & 20% higher scroll blade, which is

realized by adapting newly developed material,

increases compression volume by 50%.

50% thinner

20% higher

Iron based alloy casting

produced by Thixocasting

process.

Thixocasting process

In the way that cast the material

in a semi-molten state, it is

capable of producing very high

strength products.


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Maximized

surface area

32

fins!

30% smaller fin pitch

New Current

4-faceheat exchanger

50% more heat exchange surface

32

VRV IV

Refrigerant cooled inverter

VRV IV, inverter circuit is cooled by refrigerant

So, efficient & reliable cooling without influence of

ambient air temperature

Refrigerant cooled circuit


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Air net System: Energy Saving

33

I-Touch

Controller

Optimizedenergy saving

setup

Operation

data

CustomerAirnet Control Center

(ACC)Optimized

energy savingsetup

Remote

energy saving

tune-up

service

(paid contract)

Operation datareport

(via phone line)

17 Weather data

locations from India

Weather

Association

Forecast Data

Spot

forecast

System overview

I-Manager

or

This system tunes the air conditioner according to customer's outdoor

indoor location, operating conditions and day by day weather condition.

* Optional chargeable service

Environment

34


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Water

2.6 watts/lb

25 watts/ lb

Refrigerant

A ir

0.14 watt s/lb

VAV VWV VRV

Heat Transfer Media

Why Refrigerant?The commonly used methods of Heat Transfer in Air Conditioning solutions each

exercise different operational characteristics regards adding or removing heatenergy to a conditioned space as follows:

This diagram represents the energy transfer possible per lb of media due to the

performance characteristic of the fluid used.35

Environmental Consciousness

RoHS (Reduction of Hazardous Substances)

High COP (lower global warming impact, lower running cost)

Less refrigerant (zero ODP, lower global warming impact)


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Further Energy saving through

Smart Controller

37

Location Time Hour Set Temp. Mode SetRemote

Restriction

Lift Lobby/

Common

areas

Morning8:00 -10:00

26

C Cooling No

Up to

Lunch

10:00 -

14:00- Fan Yes

Afternoo

n

14:00 -

20:0026

C Cooling No

Night20:00 -8:00

- Fan Yes

Energy Savings Proposal by Controller

Location Time Hour Set Temp. Mode SetRemote

Restriction

Office

Morning9:00 -

13:0023-25

C Cooling No

Lunch13:00 -14:00

- Fan Yes

Afternoon14:00 -

18:3024-26

C Cooling No

Evening 18:30 Stop All Systems

Case Study: Project @ Pune

Scheduling Required by client

Without Energysavings

25/08/10~31/8/10

( Previousconditions)

With Energysavings Proposal

1/09/10~7/09/10

( Presentconditions)

Total Testing Area 4 Floors: Right & Left Wing- 1 & 2 Floors

Centralized System38


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0

50

100

150

200

250

300

350

25-Aug 26-Aug 27-Aug 28-Aug 29-Aug 30-Aug 31-Aug 1-Sep 2-Sep 3-Sep 4-Sep 5-Sep 6-Sep 7-Sep

Wed Thur Fri SaturdaySunday M onday Tuesday Wed Thur Fri SaturdaySunday M onday Tuesday

24 24 24 24 24 25 25 25 25 25 25 25 25 25

kwh

kwh

1545 Kwh 1202 Kwh

Energy savings weekly = 22 %

Mean Ambienttemp

325 kwh

250 Kwh

Weekly Energy Savings

Reduction- 22 %

Energy savings= (1545-1202)/1545*100

Day

before after

Case Study: Project @ Pune

39

System Structure

For download PPD data anduploading project data

40


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Indoor Environmental quality

41

Outdoor Air Processing Unit

42

Fresh air treatment and air conditioning with a single system

Fan coil units for air conditioning and an outdoor-air processing unit can be

connected to the same refrigerant line.

Enhanced design flexibility and a significant reduction in total system costs.


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Outdoor Air Processing Unit

43

Fresh air treatment and air conditioning with a single system

Fan coil units for air conditioning and an outdoor-air processing unit can be

connected to the same refrigerant line.

Enhanced design flexibility and a significant reduction in total system costs.

Heat Reclaim Ventilation (HRV)

44

ON/OFF signal

Cooling/Heating mode signalSet temperature signal

Ventilation signal

Failure detection signal

LCD remote

controller for

indoor unit

VRV Indoor unit

HRV

Air ConditioningLoad Reduced byApproximately 28%

Ex. air

23C 50

Cooled FA

27.5C 75

Hot F.A.

35C 80

Exhaust air

HRV recovers heat from Exhaust air


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Future Direction

45

Future direction

Super large

projectIntegration with

applied system

Multi functionCooling/heating/

floor heating/hot

water supplyCooling+heat

recovery for hotwater

Optimization for

residenceConnection with

HA automation

Price optimizationby residenceconcentratedspecification

Further Hi-

COPHi-COPrefrigerantRevolutionarycompressor/hea

t exchanger

VRVDiversification

of the heat

sourceElectricGasGeo thermaletc

46


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Multi function VRV

4HP48HP

Hot water supply

Floor heating

Air-conditioning

47

VRVfor cold area

2 step compression type

Hi-COP even at20degC

10HP20HP

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Ice thermal storage VRV

Ice thermal storage tank

VRV

10HP42HP

49

CO2VRV

10HP

50


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Gas heat pump VRV

8HP50HP

51

Typical cluster details:Size: 93,000 sqm

Average floor plate size:

Wing 1&4 2,600 sqm

Wing 2&3 3,000 sqm

Floor Levels

Wing 1&4 2 Lower Ground Floor+Ground Floor+5 Floors

Wing 2&3 2 Lower Ground Floor+Ground Floor+7 Floors

Equipment Configuration:

System Selected VRV III (Total Capacity: 16512 HP, 928 ODU)

Refrigerant R-410A

Outdoor Units Heat pump types

ModelRXYQ18PY1: 896 nos.

RXYQ12PY1: 32 nos.

Indoor Units FXFQ-MVE (Ceiling Mounted Multi Flow Cassette): 6,600 nos.

Control System Intelligent Manager III (DAM602B51: 32 nos.)

Project Detail: EONVRV III was selected for its various practical

benefits.

1.Phase wise installation and commissioning;

2.Energy Savings

3.Simplified Control and Maintenance

4.Independent AC system for each tenant

Customer Criteria for A/C selection :

SEZ Special Economic Zone project

=> VRV Biggest project

Location: Pune, India

Project Details:

Application of VRV technology on large size projects

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Thank you for your attention!

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Documents

Daikin Presentation -VRV Technology