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8/18/2019 Building Envelop by Engr. Julian Bott (2)
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Award-winning, multidisciplinary consulting engineers
Innovative, deliverable solutions for the built environment
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Cundall
ServicesBuilding services
Civil engineering
Structural engineering
Ecologically sustainable design
Geotechnical engineering
IT & Communications
TransportationUtil ities management
Critical systems
Advisory services
Fire engineeringSpecialist lighting
AustraliaChinaHong KongCyprusLibyaSpain
RomaniaUAEUK
Hong Kong
UK
Aust ral ia
UAE Shanghai
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Leaders in building design
Building Services Awardsā¢ Major Project of the Year (2009)ā¢ Innovation of the Year (2009)ā¢ International Achievement Award (2009)
Sustainable Building Services Awardsā¢ Sustainable Refurbishment Award (2007)ā¢ Sustainabili ty Champion of the Year (2008)
BCO Awardsā¢ Innovation of the Year (2008)ā¢ Best of the Best (2007)ā¢ plus numerous regional BCO awards
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Cundall
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Specialised Services
Sustainable Focus and Specialised services
Sustainable Masterplanning Advise:
Sustainability strategic advicePlanningEnergy infrastructureWater infrastructure advice
Drainage and water treatment adviceMicroclimate AnalysisSun & Wind analysisDistrict cooling and heating design
Rating tool assessments (LEED, BEAM etc)Energy & Daylight ModellingLow Energy Systems DesignFaƧade thermal and daylight designBuilding integrated renewable
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Cundall
SectorsCommercial Office
Residential
InfrastructureIndustrial
Hospitality
Healthcare
Retail
Aged Care
LEEDBREEAMHK-BEAM
GREEN MARKGREEN STARCASBEE
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Highest Rated Buildings
SA Water AdelaideFirst 6 Star Green Star Certified building in SAEarned most Green Star points in history
33 Breakfast Creek Rd, BrisbaneFirst 6 Star Green Star Certified building in QLD
The Gauge, MelbourneFirst 6 Star Green Star Certified
speculative office building in Australia
The Ark, Sydney6 Star Green Star Certified building in NSW
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33 Breakfast Creek Road,Brisbane, Australia
33 Breakfast Creek Road, Brisbane6 star Green Star ā Office Design
All Active Chilled Beam
100% outside air
FaƧade design to reduce loads and reduce infiltration
Heat recovery and thermal wheels to precondition air
Cundall role: All building services & ESD
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Rouse Hill Town Centre, Sydney180,000mĀ² retail & mixed-use town centre development completed 2007
Semi-outdoor mall environment
25% reduction in ecological footprint
40% energy saving and 60% water saving
Banksia Environmental Award 2008
AJC, Rice Daubney and GSA Group
Outdoor Retail Mall
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Rouse Hill Outcomes
ā¢ All retailers completed an EcologicalFootprint calculator
ā¢ Several major tenants launch new āGreenāStores
ā¢ Waste is recycled and/or sent to biogas
generation
ā¢ Green Travel
ā¢ Recycled content
ā¢ Over 130,000 tonnes of recycled materialsused in construction
ā¢ Community and schools educationprogram
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Building Upgrades
CAE HeadquartersShenzhenShenzhen (border with HKSAR)Target LEED GOLD Refurbishment
ā¢ Radiant Slab Cooling with UFADā¢ 15-20% lower energy than
upgrading to ASHRAE 90.1 systemsā¢ 30% Increased O/A rates withthermal wheel heat recovery AHUā¢ Rainwater & Condensate recoveryand re-use
ā¢ Double skin High performancefaƧade, double glazingā¢ Solar PV and Hot Water ā¢ Roof gardenā¢ Re-use fitout materials
ā¢ Recycled construction Wasteā¢ Low VOC paints
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China projects
DaZhongLi Development,Shanghai, Swire Properties
Sustainability consultancy
ā¢310,000 mĀ² GFA mixed development
ā¢2 offices towers, 3 hotels, 1 shopping mall
ā¢Targeting LEED Gold rating
Features:
ā¢Low energy faƧade
ā¢High efficiency & resilience MEP system
ā¢CHP for dist rict heating and cooling
ā¢Recycle rainwater, condensate & grey water ā¢Renewable energy integration ā BIPV, SHW
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Ascendas iHub
Suzhou, China
iHub, Suzhou - Ascendas
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Reflection
How do I convince my clients?
How expensive is it to go green ?
Many skills and the desire is here
How do we get mass market focus?
Reflection on local issues
We canāt afford the technology
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1990s
Supply Supply + Demand
2000
āGreenābecomes a
valueproposition
2009
āGreenādevelops
vision
SustainabilityReactionary - Reducing Unsustainability
āGreenāintroducedto industry
āGreenābecomes
defined andmeasured
Architecture Inspired Green Analysis
Mass Demand
Purpose Creation
Green Evolution
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Government Policy Market forces
How Legislation to targetworst practises
Rating systems to define value
What Prescriptive requirementsā¢Fabric (Glazing,insulation)ā¢Equipment efficiency
Early adopters sought recognition
Competition Demand
Demand fuelled innovation
Now Performance targetsā¢Energy targets
Rating systems upgradedHigher targets set
Future Future legislation willpenalise high carbonusers
CSR and carbon reportingDow Jones Sustainability index
Two driving forces in green building
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Environment
ā¢ Greenhouse Gasesā¢ Waste reduction
ā¢ Water savingā¢ Renewables
Goals for the market
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Environmentā¢ Greenhouse Gases
ā¢ Wasteā¢ Water ā¢ Renewablesā¢ Indoor Air Quality
Economic
ā¢ Return on investmentā¢ Running costsā¢ Occupant satisfactionā¢ Investment in Quality
Joint Objectives
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External Environment
ā¢ Greenhouse Gasesā¢ Wasteā¢ Water ā¢ Renewablesā¢ Indoor Air Quality
Economic
ā¢ Running costsā¢ Return on investmentā¢ Occupant satisfactionā¢ Investment in Quality
EnvironmentalSustainability BusinessSustainability
Understanding your clients
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Environment
ā¢ Greenhouse Gasesā¢ Wasteā¢ Water
ā¢ Renewables
ā¢ Indoor Air Quality
Economic
ā¢ Running costsā¢ Return on investmentā¢ Occupant satisfactionā¢ Investment in Quality
Sustainability
EnvironmentalSustainability
BusinessSustainability
Create a link
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Environment
ā¢ Greenhouse Gasesā¢ Waste & Water
ā¢ Indoor Environmentā¢ Renewables
Economics
ā¢ Running costsā¢ Return on investmentā¢ Occupant satisfactionā¢ Investment in Quality
Sustainability
EnvironmentalSustainability
BusinessSustainability
Social
ā¢ Urban planningā¢ Mobility
ā¢ Quality of livingā¢ Culture and History
SocialSustainability
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Related benefits
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Green Cities
Green Buildings
GreenReal Estate
GreenOrganisations
Green Evolution
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How to move towards greener buildings?
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Keep it Simple
Integrated Design
Brief
Concept
Design
Delivery
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Sustainability Strategy
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Whatās important
MasterPlanning
ConceptDesign
DetailDesign Construct Operate
l b d
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Steps to lower carbon in design
Design Criteria
Passive Design
Internal Loads
Energy Efficiency
HeatRecovery
On-site
renewables
?
Comfort criteria, lighting levels,fresh air quantity, operating hours
Form: daylight & natural ventilationFabric: insulation, facade, thermal mass
Lighting & Equipment (W/m2)Controls ā turn off
Heating, cooling & ventilation systemsControl strategy
Air to air, waste heat from chillers Aquifer Thermal Storage
biomass, geothermal, solar, wind
fuel cells?
off site renewables
R e
d u c
i n g e n e r g y c o n s u m p
t i o n
R e n e w a
b l e s
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Design Response
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Site
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Climate Responsive
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Trends ā Summer all winds
Prevailing Conditions
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Site
Built Form
EnvelopeServices
Resources
DesignResponse
Built Form
Design response ā Built Form
B il F
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Built Form
Built Formā¢ Does the floor plan suit the use of daylighting and natural
ventilation?
ā¢ Can courtyards or atriums be used to increase natural light /ventilation?
ā¢ How does the built form affect services design?
ā¢ Can it be used to exploit prevailing site condit ions?
ā¢ Can the thermal mass of structural systems be used beneficially?
ā¢ Are green roofs viable?
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Built Form ā orientation
North SouthOrientation
Effective
ExternalShading
East WestOrientation
Difficult toShade
Cl d V O B
http://g/support/eco/module.eco
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Leasing PreferenceClosed Box
Open Street Mall
Closed Vs Open Box
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Thermal Comfort ā Do we need AC 22-24 Degrees
Air Temperature
Radiant Temperature
Air Speed
Relative Humidity
Clothing Level
Activi ty Level0
5
10
15
20
25
30
0.5 1 1.5 2 2.5 3
Air Vel oci ty m /s
S E T T e m p e r a
t u r e
( o ) C
Summer 30 Mid-Season 20 Winter 14
Lower Limit Upper Limit
OUT_SET
StandardEffectiveTemperature(SET)
provides acomfort indexthat factors in allelements ofcomfort and
returns a singletemperaturereference point
Open Street Malls
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Open Street Malls
Raise setpoint in malls
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Raise setpoint in malls
Promote and improve outdoor comfort
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Promote and improve outdoor comfort
Underfloor natural cooling Shading Landscaping
Inspired by Traditional Filipino Architecture
bahay -kubo
Living quarters are raised aboveground and kept cool with stone floor
below and airflow through slotted floor
Landscaping to create a microclimate and provide water features for evaporative cooling
Daylight streets & buildings
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Daylight streets & buildings
Daylight to develop form
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y g p
Westfield Centrepoint, Sydney
Atrium cut-outs for significantlyimproved daylight
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Daylight AnalysisFor Tropical Climate
Retail improved internal space
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p p
Daylight
Design Response - Envelope
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Site
Built Form
EnvelopeServices
Resources
DesignResponse
Envelope
Design Response Envelope
Envelope
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p
Envelopeā¢ Is the building to be sealed tight or is the envelope to
breathe?
ā¢ What glazed area is desired: full height, strip or punched?How does this affect mechanical and electrical services?
ā¢ Is external shading suitable? Should this be fixed or
adjustable?ā¢ What is the whole-of-life cost of the faƧade system?
ā¢ What are comfort and daylight implications of different
facade options?ā¢ Does the building fabric meet or exceed code requirements
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Envelope & energy
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Advances in Glazing
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Advances in Glazing
Glazing Colour
ShadingCoefficient
Sc
Visible LightTransmittance
VLT
Energy
Day
light
Standard Double Glazed Clear 0.7 70%
Double Glazed Tinted Grey 0.3 30%
Double Glazed Low ESpectrally reflective Light Grey 0.26 45%
Double Glazed Low ESpectrally reflective
Neutral 0.28 55%
Double Glazed Low ESpectrally reflective Clear 0.4 60%
Illustration depicts single-, double-, and triple-silver-coated glasstechnology.
Beyond Low E
Spectrally selective glazing
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Shading
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Shading
Shading optimisation
ā¢Detailed analysis of faƧade
ā¢Shading can be optimised on eachfaƧade where necessary
ā¢Reduce peak loads and energyconsumption
ā¢Reduced OTTV
Design response - Services
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Site
Built Form
EnvelopeServices
Resources
DesignResponse
Services
Concept Design
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Energy Modellingā¢ Predict energy consumptionā¢ Predict occupants comfort
ā¢ Advise on building form, faƧadeā¢ Advise on M&E options
Option Studies
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0
100
200
300
400
500
VAV Underfloor Air Passive
Chilled
Beam Active
Chilled
Beam Active
Chilled
Beam & Inffusers Active
&
Passive
Chilled Beam Underfloor
&
no
ceiling
Central plant & AHU On floor system Ceiling & Sprinkle r Raised floor & Sprinkler
Conceptual Design
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VS1 Project, AdelaideFloor layout
Atrium ā light, air, connectivityFaƧadeServices ā ceiling v floor air Water & energy systems
Welcome Trust Ceiling(Completed 2005)
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Fresh air introduced to the space via apressurised floor void at 2.3l/s per mĀ²
Naturally ventilated faƧade system reduces the solar gain into the space.
Radiant Cooling ceiling panelsWith exposed slab (thermal mass)
Passive chilled beams
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The Gauge, Melbourne6 Star Green Star
Efficient lighting
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Improving TechnologiesGaN LED ā 10x cheaper (available in 2011?)
Task lights Modelling lighting options
Not all light fittings are the same!
62W but 30% more light output61W light fitting
Office lighting nowtargets 5-6W/m2
Saving 50%-75% onconventional design
Radiant cooling
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CAE HeadquartersShenzhen, ChinaShenzhen (border with HKSAR)Target LEED GOLD Refurbishment
ā¢ Radiant Slab Cooling with UFAD
ā¢ 20-25% lower energy than upgradingto ASHRAE 90.1 standard
ā¢ 30% Increased O/A rates with thermalwheel heat recovery AHU
ā¢ Rainwater & Condensate recovery
ā¢ Double skin High performance faƧade,double glazing
New Building Design
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VS1 Project, Adelaide6 star Green Star ā Office Design
ā¢Underfloor air
ā¢100% outside air
ā¢No heat recovery ā relies on widertemperature band and Adelaide climate ā wide economy cycle
ā¢Fritted glass veil to west
ā¢Shading to north and south
ā¢Performance double glazing
ā¢340kWe cogeneration with absorptionchiller
Cundall role: ESD & concept designs
Underfloor AC
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VS1 Building, Adelaideā¢ Underfloor air conditioning
ā¢ 100% Outside air provided under most operating conditions
ā¢ Cooling from the floor only
ā¢ Improved fresh air to occupants
FaƧade design is fundamental
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VS1 Building, Adelaide
8m
Horizontal walkwaysblock high angle sun
Fritted glass reduceslow angle sun
Conclusion
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Design for the climate ā STOP using energy to compensate for
lack of climate responsive design
Create positive visions ā create and understand the value of
building green
New ways of thinking ā think beyond the boundary of building
design
Collaborate with clients ā leave the client knowing more
Whatās needed?
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Common goals for the industry ā common reporting and benchmarks
Clear government direction & strong policy - we canāt rely on theindustry alone if we are to influence all buildings
Technology & skills exist for cost effective solutions
Time to complete design & focus on operation
Evaluation of buildings actual performance ā The long term focus
needs to be on the results
How can we help ?
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ā¢ Quantify and evaluate the design options
ā¢ Guide our clients towards cost effective solutions
ā¢ Identify the cost effective solutions specific to the climate and
building type
ā¢ Introduce the whole building design approach to building
services by designing the building to be energy efficient.
ā¢ Challenge the standard approach to engineering design.
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www.cundall.com