Building Envelop by Engr. Julian Bott (2)

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 Awards• Major Project of the Year (2009)• Innovation of the Year (2009)• International Achievement Award (2009)

Sustainable Building Services Awards• Sustainable Refurbishment Award (2007)• Sustainabili ty Champion of the Year (2008)

BCO Awards• Innovation of the Year (2008)• Best of the Best (2007)• 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 DesignFaçade 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 – Office Design

All Active Chilled Beam

100% outside air

Façade 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, Sydney180,000m² 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

• All retailers completed an EcologicalFootprint calculator

• Several major tenants launch new ‘Green’Stores

• Waste is recycled and/or sent to biogas

generation

• Green Travel

• Recycled content

• Over 130,000 tonnes of recycled materialsused in construction

• Community and schools educationprogram


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Building Upgrades

CAE HeadquartersShenzhenShenzhen (border with HKSAR)Target LEED GOLD Refurbishment

• Radiant Slab Cooling with UFAD• 15-20% lower energy than

upgrading to ASHRAE 90.1 systems• 30% Increased O/A rates withthermal wheel heat recovery AHU• Rainwater & Condensate recoveryand re-use

• Double skin High performancefaçade, double glazing• Solar PV and Hot Water • Roof garden• Re-use fitout materials

• Recycled construction Waste• Low VOC paints


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China projects

DaZhongLi Development,Shanghai, Swire Properties

Sustainability consultancy

•310,000 m² GFA mixed development

•2 offices towers, 3 hotels, 1 shopping mall

•Targeting LEED Gold rating

Features:

•Low energy façade

•High efficiency & resilience MEP system

•CHP for dist rict heating and cooling

•Recycle rainwater, condensate & grey water •Renewable energy integration – 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 can’t afford the technology


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1990s

Supply Supply + Demand

2000

‘Green’becomes a

valueproposition

2009

‘Green’develops

vision

SustainabilityReactionary - Reducing Unsustainability

‘Green’introducedto industry

‘Green’becomes

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 requirements•Fabric (Glazing,insulation)•Equipment efficiency

Early adopters sought recognition

Competition Demand

Demand fuelled innovation

Now Performance targets•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

• Greenhouse Gases• Waste reduction

• Water saving• Renewables

Goals for the market


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Environment• Greenhouse Gases

• Waste• Water • Renewables• Indoor Air Quality

Economic

• Return on investment• Running costs• Occupant satisfaction• Investment in Quality

Joint Objectives


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External Environment

• Greenhouse Gases• Waste• Water • Renewables• Indoor Air Quality

Economic

• Running costs• Return on investment• Occupant satisfaction• Investment in Quality

EnvironmentalSustainability BusinessSustainability

Understanding your clients


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Environment

• Greenhouse Gases• Waste• Water

• Renewables

• Indoor Air Quality

Economic


Sustainability

EnvironmentalSustainability

BusinessSustainability

Create a link


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Environment

• Greenhouse Gases• Waste & Water

• Indoor Environment• Renewables

Economics


Sustainability

EnvironmentalSustainability

BusinessSustainability

Social

• Urban planning• Mobility

• Quality of living• 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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What’s 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 – 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 – Summer all winds

Prevailing Conditions


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Site

Built Form

EnvelopeServices

Resources

DesignResponse

Built Form

Design response – Built Form

B il F


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Built Form

Built Form• Does the floor plan suit the use of daylighting and natural

ventilation?

• Can courtyards or atriums be used to increase natural light /ventilation?

• How does the built form affect services design?

• Can it be used to exploit prevailing site condit ions?

• Can the thermal mass of structural systems be used beneficially?

• Are green roofs viable?


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Built Form – 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 – 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

Envelope• Is the building to be sealed tight or is the envelope to

breathe?

• What glazed area is desired: full height, strip or punched?How does this affect mechanical and electrical services?

• Is external shading suitable? Should this be fixed or

adjustable?• What is the whole-of-life cost of the façade system?

• What are comfort and daylight implications of different

facade options?• 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

•Detailed analysis of façade

•Shading can be optimised on eachfaçade where necessary

•Reduce peak loads and energyconsumption

•Reduced OTTV

Design response - Services


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Site

Built Form

EnvelopeServices

Resources

DesignResponse

Services

Concept Design


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Energy Modelling• Predict energy consumption• Predict occupants comfort

• Advise on building form, façade• 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 – light, air, connectivityFaçadeServices – 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 m²

Naturally ventilated façade 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 – 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

• Radiant Slab Cooling with UFAD

• 20-25% lower energy than upgradingto ASHRAE 90.1 standard

• 30% Increased O/A rates with thermalwheel heat recovery AHU

• Rainwater & Condensate recovery

• Double skin High performance façade,double glazing

New Building Design


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VS1 Project, Adelaide6 star Green Star – Office Design

•Underfloor air

•100% outside air

•No heat recovery – relies on widertemperature band and Adelaide climate – wide economy cycle

•Fritted glass veil to west

•Shading to north and south

•Performance double glazing

•340kWe cogeneration with absorptionchiller

Cundall role: ESD & concept designs

Underfloor AC


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VS1 Building, Adelaide• Underfloor air conditioning

• 100% Outside air provided under most operating conditions

• Cooling from the floor only

• Improved fresh air to occupants

Façade 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 – STOP using energy to compensate for

lack of climate responsive design

Create positive visions – create and understand the value of

building green

New ways of thinking – think beyond the boundary of building

design

Collaborate with clients – leave the client knowing more

What’s needed?


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Common goals for the industry – common reporting and benchmarks

Clear government direction & strong policy - we can’t 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 – The long term focus

needs to be on the results

How can we help ?


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• Quantify and evaluate the design options

• Guide our clients towards cost effective solutions

• Identify the cost effective solutions specific to the climate and

building type

• Introduce the whole building design approach to building

services by designing the building to be energy efficient.

• Challenge the standard approach to engineering design.


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Building Envelop by Engr. Julian Bott (2)

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