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Advancing Net Zero and Beyond“Green Buildings for Everyone, Everywhere. Smart and Healthy within the 1.5 Degrees”
Ar Ada YS FUNG, BBSRegistered Architect, FHKIA, FCIOB, BEAM ProBoard Secretary and Director, World Green Building Council Director, Hong Kong Green Building CouncilChairperson, Committee on Building Information Modelling, Construction Industry CouncilPresident, Lighthouse Club (Hong Kong)President, Hong Kong Alliance of Built Asset & Environment Information Management Associations cum HK Chapter of buildingSMART InternationalFormer Deputy Director of HousingPassive & Low Energy Award (PLEA 2018 Awardee)
Advancing Net Zero Seminar cum Workshop. Hong Kong. 29 November 2019
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Sustainability
Our sector is crucial to delivering global goals
HealthyPositive impact on the health and well-being of inhabitants
Good businesshomeowners, occupiers, tenants demand green & healthy buildings
Great investmentsales premium from 1 to 30% green building investment = increased asset value
Green buildings improve our lives and bottom line
Our Strategy: drive sector impact
Net zero embodied carbon – definition and principles As a way of bringing greater clarity to our aims and objectives, WorldGBChas worked with our member GBCs and other valued partners to define net zero embodied carbon.
Net zero embodied carbon should be pursued as part of a whole lifecycle approach to carbon reduction that includes net zero operational carbon.
Our definition of net zero embodied carbon in practice: A net zero embodied carbon building (new or renovated) or infrastructure asset is highly resource efficient with upfront carbon minimised to the greatest extent possible and all remaining embodied carbon reduced or, as a last resort, offset in order to achieve net zero across the lifecycle.
When asked about trends GBCs reported climate change, energy transition and energy efficiency were key trends. This has led to a focus on existing building – retrofits as well as performance in operation. GBCs pointed to an increase in the supply of green products and a focus on the circular economy. The residential market is greening, starting with social and affordable housing and supported by green mortgages. GBCs are working collaboratively with government and in many countries
incentives are being provided for green building. Technology is being used as an enabler for sustainability, especially amongthe millennials. There is a focus on healthy people, including air quality.
Carbon/energy efficiency Residential Supply chain
Government Finance PropTech
Trends presenting opportunities
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Take affordable housing as an example, the Hong Kong Housing Authority (HKHA) always has been striving to make rational use of resources, overcoming challenges, bringing passive and low carbon design, total quality, safety & health, sustainability from dreams to fruition. These cover process, products and people aspects.
“Green, Low Carbon and Sustainable” Case Study:Planning & Design for Sustainability of Quality Public Housing by Hong Kong Housing Authority
Human X Nature
Caring for PeopleCaring for Environment
Baseline performance - Hong Kong Planning Standards and Guidelines & Statutory
Consult Stakeholders - other Government Departments, District Councils and Local community
Comprehensive approach – transport, car parking, community centre, social welfare, educational and commercial facilities, pedestrian circulation, local open spaces and landscaping etc.
2.1 Planning for People
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Public transport terminus and pick-up areas linked up with covered walkways and lift towers ….
Tactile Guide Path System at strategic locations of housing estates to lead people to domestic blocks
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(a) Planning for People
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2.2 Designing for People with Nature in Mind
1. Ensure public health and safety, living in comfort and convenience2. Host of Technical studies helping designers to integrate passive design
elements holistically and refine the estate layout and building disposition
3. A balanced design assuring social, economic and environmental sustainability, maximizing development potential, fast tracking the delivery of public housing
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(b) Designing for People with Nature in Mind
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Project Life CycleFeasibility
Studies and Conceptual
Layout
Scheme Design and Project
Budget
Site Inspection and
Acceptance
Detailed Design and
SpecificationTender Construction
(Foundation)Construction
(Building)Maintenance
PeriodFinal
Account
• Technical Studies for Potential/New Housing Sites1. Air Ventilation Assessment2. Microclimate Studies3. Retail Viability Study4. Project Feasibility Studies5. Architectural Feasibility Studies6. Site Potential Studies7. Visual Impact Assessment8. Heritage Impact Assessment9. Ecological Assessment10. Land Use Studies11. Planning and Engineering Study12. Environmental Assessment Study13. Air Quality Objectives Assessment
14. Odour Assessment15. Chimney Emission Impact Assessment16. Traffic Impact Assessment17. Drainage Impact Assessment18. Sewerage Impact Assessment19. Land Decontamination Study20. Ground Assessment21. Natural Terrain Hazardous Study22. Potentially Hazardous Installations
Assessment23. Tree Survey24. Condition Survey for Existing Building25. Land Surveying26. Archeological Study
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IMPLEMENTING CARBON EMISSION ESTIMATION (CEE) SINCE
2011/12(SHEET 1 OF 4)• In 2010, the HKSAR issued a Consultation Document
proposing a reduction in carbon intensity of at least 50% - 60% by 2020 (2005 as baseline).
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• A straight forward and pragmatic methodology to control the embodied carbon emission of building materials and building operational carbon emission.
• Life-cycle carbon emission for major construction materials and building operations from cradle to grave.
Aspect Embracing
I : Materials Consumed During Construction
Timber formwork for substructure & superstructure Steel formwork for superstructure
II : Materials for Building Structure
Concrete for substructure & superstructure Steel for substructure & superstructure
III : Communal Building Services Installations
Lighting, Lift, Water Supply, Security, CABD, A/C & Ventilation, Fire Services, Electrical Distribution System
IV : Renewable Energy Solar and/or wind powered system
V : Trees Planting Trees taller than 5m
VI : Demolition Dismantling of building Transportation of building debris from site to landfill
SIX ASPECTS IN CEE MODEL FOR BUILDING LIFE OF
100 YEARS(SHEET 2 OF 4)
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Total Carbon Emission (Sheet 3 of 4)
IMaterials
ConsumedDuring
Construction
IIMaterials
for Structure
IIICommunal
BS Installations
VIDemolition
IVRenewable
Energy
VTrees
Planting
Total Carbon Emission = I + II + III – IV – V + VI
Aspect IV and Aspect V are “Green” aspects contributing to “carbon-reduction” and“carbon-absorption” effect.
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Aspects
Block Comparison Estate Comparison
NH1 (Benchmark) Sheung Shui Project
Kai Tak 1A(Benchmark) Sheung Shui Project
CO2 Emission (kg)[Percentage of Total
CO2 Emission]
I 372,418[0.7%]
332,859[0.9%]
3,517,203[1.1%]
740,079[0.9%]
II 17,324,483[33.4%]
14,819,282[38.0%]
116,912,499[35.7%]
32,043,637[38.2%]
III 33,737,071[64.9%]
23,998,491[61.5%]
209,364,438[63.9%]
51,630,412[61.6%]
IV 0[0%]
-571,025[-1.5%]
-4,111,380[-1.3%]
-1,142,050[-1.4%]
V 0[0%]
0[0%]
-797,947[-0.2%]
-388,700[-0.5%]
VI 527,120[1.0%]
462,000[1.2%]
2,738,736[0.8%]
981,200[1.2%]
Total 51,961,093[100%]
39,041,606[100%]
327,623,549[100%]
83,864,578[100%]
Number of Flat 799 639 5,204 1,358
Gross Floor Area (GFA) (m2) 33,078 27,722 212,886 58,774
Construction Floor Area (CFA) (m2) 36,686 30,223 232,752 64,029
CO2/Flat (kg/Flat) 65,033(100%)
61,098(93.9%)
62,956(100%)
61,756(98.2%)
CO2/GFA (kg/m2) 1,571(100%)
1,408(89.6%)
1,524(100%)
1,427(93.6%)
CO2/CFA (kg/m2) 1,416(100%)
1,292(91.2%)
1,408(100%)
1,310(93.0%)
BENCHMARKING (SHEET 4 OF 4)
Carbon emission below the Benchmark
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Implement ISO 50001 EnMS (Sheet 1
of 3)
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COMPARISON OF CARBON EMISSION% OF THE 6 ASPECTS(Kai Tak Site 1A)CARBON EMISSION (%)
Based on the CEE Model,communal building services installations is the biggest portion of carbon emission
An Energy Management System (EnMS) to ensure the energy efficiency of communal building services installations
In 2014, further reduce 10% energy consumption by lowering the Energy performance Indicator from the original 30 kWh/m² to 27 kWh/m²
ISO50001 EnMS (Sheet 2 of 3)
• Provide a systematic framework to verify the energy performance of communal building services installation designs
• Verified by actual energy measurements taken after mass tenant intake
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Energy Performance Indicators (EnPIs)
Year 2012 2013 2014
EnPI 30 kWh/m² 30 kWh/m² 27 kWh/m²
Objective Target Action Time Frame
To reduce energyuse andconsumption incommunal areaof domesticblocks
Achieve areductionequivalent to10% of the 2011energy base linevalue by 2014
Energy certificates PV panel systems 2-level lighting control
systems
2012-2014(on-going)
Optimized lighting designs
Lift regenerative power for 18kW or above
Gearless lift
2014(on-going)
LED bulkheads 2015
Energy Objectives, Targetsand Action Plans
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ISO50001 ENMS (SHEET 3 OF 3)
GREEN PEACE’S FIGURES IN 2010
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According to Green Peace’s press release in June 2010, the annual electricity consumption of communal areas per domestic flat of the some private domestic premises are as follows –
Private Estates kWh per flat per year
Manhattan Hill 6,834
One Beacon Hill 6,725
The Pacifica 4,359
Aqua Marine 3,409
Central Park 3,294
Island Harbourview 3,127
Housing Authority PRH 807(Green Peace’s figure, 2010)
678(HA’s figure, existing building, 2013/14)
596 (HA’s figure, new building design, 2013/14)
Average energy consumption of building services installations in communal areas designed within the year (i.e. energy estimation). These figures are:
2013/14 25.1 kWh/m2/Annum (target: 30)2014/15 24.3 kWh/m2/Annum (target: 27)2015/16 24.1 kWh/m2/Annum (target: 27)2016/17 22.8 kWh/m2/Annum (target: 24)2017/18 22.04 kWh/m2/Annum (target: 24)
CONVERSION
Corridors for the WIND
To Enhance Wind :
• Two wind corridors
• Large building separation
• Orientation of blocks in parallel with prevailing wind direction
• Ground floor empty bays
30m W
ind corridor
SW Summer wind
Annual East wind
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Average wind speed at pedestrian level
• ranges from 1.2 to 3.1 m/s under summer South‐west wind.
• around 2.5 m/s under annual East wind.
SW Summer windAnnual East wind
Comparing with a baseline scheme, the design results 37.8% improvement in wind velocity ratio within the development.
Computer Simulation on Wind Performance
View from the East
• Standard flat modules were adopted in the block design facilitating pre‐fabricated products, reducing construction waste and pollution.
• Rotational symmetry in the layout of typical domestic floors was adopted for easier construction.
• BIM was used for clash detection prior to construction for minimizing abortive works and maximizing accuracy in material ordering.
• Fair face off‐form finishes with paint to exterior and with tile/paint to interior.
• Minimize wet trades on site by prefabrication.
BIM as Design Tool
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1 or 2 Person Flat
2 or 3 Person Flat
1‐Bedroom Flat
2‐Bedroom Flat
BIM ClashAnalysis for Wet Market Design
BIM coordination
HKHA has developed Carbon Emission Estimation tool. In estimating CO2 emission of buildings, we focus on the CO2emission associated with major construction materials and building operations for a building life of 100 years .
• Total green planting area over 14,000 m2 toreduce heat island effect.
• 327 bicycle parking spaces are provided in theestate to encourage green living.
• Green Corners are provided at G/F EntranceLobby of every domestic block and EstateManagement Office.
Carbon Emission
CO2 emission of Hung Fuk Estate is compared against a BEAM Platinum Benchmark Estate (Kai Tak Site 1A), none of the aspects are exceeded.
Green Initiatives
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98% 100% 95%
54%
0%
20%
40%
60%
80%
100%
120%
per Flat per GFA per CFA per Site Area
100 %Benchmark Kai Tak Site 1A
%of CO
2 Em
ission
of Kai Tak site 1A
A Weather‐proof Open Air Public Transport InterchangeCourtyard design not only brings breeze effectively,it also enhances air movement downstreamhelping the dispersal of pollutant from buses bynatural means.
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Roof cover design allows natural ventilation, penetration of natural lighting and provides shelter in wet weather
SAFE
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Design for Safety : Caring for Workers & End Users
Space for BS maintenance
Strengthened Parapets to fix gondola
Easy maintenance for A/C Provide railing to all roof
Providing Easy and Safe Access for Maintenance and Cleansing Personnel – Upper Roof
Cat Ladder - provided and located awayfrom edge of building
Steel Stair
Upper Roof withSafe Access
Suspended Steel Service Platform
An Integrated Example – Safe Access to Upper Roof
Permanent anchorage to access lift pit
Healthy Living for People, Easy to Build & Easy to Maintain
Standard Fittings and Design for Easy Maintenance• Concrete Staircase to provide safe access to upper roof• Twin Water Tank System to provide uninterrupted water
supply to tenants when one of the compartments is beingcleaned
• W‐Trap System to avoid drying up water seal to prevent the spread of disease, waste water from wash basin/ shower is directed to replenish the common W‐trap connected to the floor drain
• Stainless Steel Water Pipes are used in common areas
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Precast facade
Concrete stair for maintenance access to upper roof Twin Water Tank System
Simple Fitting and Design in Typical Lift Lobby
W‐Trap System for Healthy Living
Volumetric Precast
Bathroom
S.S Water Pipe
Precast Fabrication• 30% by volume of concrete is precast components including volumetric bathroom, façade,
staircase, semi‐precast slab and additional precast elements proposed by Contractor
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Smart Use of MaterialsTransfer of C&D Waste Materials• Established an inventory on quantities of C&D materials
available from each site.• Facilitate bulk transfer between HA’s contracts.• Over 80,000 tonnes of C&D waste have since been
reduced. Use of Recycle Materials• Marine mud• recycled glass &
aggregates• bore-logs• GGBS• recycled excavation rock
materials
3R Principle
Planning & Design
Demolition
Recycle
Reuse
Reduce
Reuse Demolished Materials
[1] All of the granites (1565 nos.) from demolished street planters were reused as finishes material for planter wall, fence wall and landscape paving, reducing landfill burden
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Demolished Roadside Planters
Reuse Materials from Construction Site
Reuse of granites as pavers
[2] Building materials such as concrete tiles, steel frames, precast volumetric bathroom & precast façade mock‐up were reused as educational displays in Recycle Garden
Reuse of granites as planters
Reuse of tiles in Recycle Garden
Reuse of precast components in Recycle Garden
Reduce Construction Wastes Reduction of 37,376 kg CO2emission by site batching plant
1. Pay for environmental and site hygiene scheme was allowed in the Main Contract encouraging the implementation of environmental protection measures.
2. Use of precast concrete components, mechanized construction, steel hoarding to reduce construction waste.
3. Site offices were built by reusable components.
4. 5,365m2 precast concrete slab was reused as haul road hard paving in construction sites.
5. Concrete batching plant was installed on site for supplying concrete
6. The use of metal formworks was maximized and timber formworks were reused as far as possible.
7. Existing plants from demolished street planters were transplanted to site office and hoarding for greening purpose.
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Sorting Inert Waste
Recycling Bins
Green Hoarding
On‐site Batching Plant
Wheel Washing
Green Site Office
Haul Road
Recycle Waste Water
Metal Formwork
Solar tubes in Site Office
Solar tubes in Site Office
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2.2 Designing for People with Nature in Mind
A balanced design assuring social, economic and environmental sustainability of public housing
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Outcome : Happy, Healthy, Satisfied Residents
Safety Health Security
Well‐being Comfort Convenience
Green Building Leadership (2015/16)
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Key Performance Indices• 34% less costly than private sector• 30% less construction waste• 75% lower accident rates
We Care• We care for the environment• We care for the people:
• Together we build a sustainable and harmonious community
Please take a look at our sustainability videohttp://www.housingauthority.gov.hk/hdw/video/videoshell_Environmental_corporate_Cant.html
Our Core Values: Caring, Customer‐focused, Creative, Committed以人為本
Air QualityNoise ControlGreen Materials
Control of HazardousMaterials
Estate Greening and Landscaping
Green Activities
Waste ManagementMicro-climate Studies
Staff Development and Participation
Operation with Cost-Effectiveness
Engaging Various Parties
Water Conservation
Sustainable Living Environment
Enhancing Estate Management & Services
Safety PerformancePublic Health & Hygiene
Housing Rent PolicyResource Optimization
Financial Performance Energy and Carbon Emissions
Biodiversity
Environmental
Social
Economic
Please read our Sustainability Reporthttp://www.housingauthority.gov.hk/mini‐site/hasr1415/common/index.html
• Customer satisfaction index rises, with max. of 98.1%
Thank You!
Back up slides
The opportunity we embrace
• Improving building efficiency represents one of the most affordable and effective ways to cut carbon emissions
• Green, sustainable buildings have reduced energy costs, water costs, waste, and other associated impacts
• They improve internal comfort conditions and therefore staff productivity • The number of building owners reporting expected increase in asset value of
green buildings of more than 10% has been risen from 16% to 30% since 2012• Investors demonstrating responsible investment are seeking portfolio risk mitigation
strategies • Accelerated energy efficiency and a shift away from fossil fuels will achieve net
zero emissions in the sector before 2050
Source: Dodge Data and Analytics, World Green Building Trends 2018
LARGE SCALE
RESPONSE
OUTCOME FOCUSED
ROADMAPTO NET ZERO
INFLUENCEOTHERS
The Net Zero Carbon Buildings Commitment
LEADERSHIP