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Technical Seminar for
HKGBC Guidebook on Urban Microclimate Study
Case Sharing: Double Cove
Mr. Kevin Ng, Ir Edward ChanHenderson Land Development Co. Ltd.
16 January 2018
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World Green Building Council
Asia Pacific Leadership in Green
Building Awards - Winner of “Leadership in Sustainable Design
and Performance (Residential)”
Quality Building Award – Grand AwardHong Kong Residential
(Multiple Buildings) Category
International Property Awards
Best International Residential High-rise Development
LEED Neighbourhood Development
Pre-Certification Gold Level
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PEOPLE-ORIENTED
Outdoor AirQuality
Indoor AirQuality
Microbe &Mold Control
Humidity Control
Water Quality
GlarePrevention
HumanCircadian Cycle
Ergonomics
Physical Health
Occupants’Wellbeing
Indoor Biophilia
Trends of Green Building
WaterReduction
RecycledMaterials
RenewableEnergy
IncreasedVentilation
EnergyReduction
WasteReduction
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Ultra high-density
city
Hong Kong
Population density
around
6392 persons / km2
BeijingPopulation density around1047 persons / km2
ShanghaiPopulation density around2699 persons / km2
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Why should we develop green building and improve the urban microclimatic environment?
High-density urban environment
High expectation of
indoor and outdoor environments
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How many earths does it take to support Hong Kong's lifestyle?
3.1 540x
Hong Kong’secological deficit
ECOLOGICAL FOOTPRINT
IN HONG KONG
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A successful business is a sustainable business. We recognize that the long-term success ofthe Group is closely linked with the health and prosperity of the communities we operate in.
Core Value
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1. Financial Considerations
No more “Birthday Cake” design
Drivers of Creating
Urban Microclimate Environment
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Poor indoor & outodor air
environment
Insufficient hours of sunshine
Small land area,Low greenery rate
Environmental Nuisance
Create HEALTHY & COMFORT
ENVIRONMENT
Built for LIVABLE COMMUNITY
Drivers of Creating
Urban Microclimate Environment
2. Customer Considerations
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Capturing & Capitalizing on the Nature…
Drivers of Creating
Urban Microclimate Environment
3. Design Considerations
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Technical Seminar for
HKGBC Guidebook on Urban Microclimate Study
Case Sharing: Double Cove16 January 2018
![Page 12: Technical Seminar for HKGBC Guidebook on Urban](https://reader034.vdocument.in/reader034/viewer/2022052306/628940d8170a9a06dc07d24a/html5/thumbnails/12.jpg)
Technical Seminar for
HKGBC Guidebook on Urban Microclimate Study
Case Sharing: Double Cove16 January 2018
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Preserved Woodland
Preserved Woodland
Technical Seminar for
HKGBC Guidebook on Urban Microclimate Study
Case Sharing: Double Cove16 January 2018
Site Area: 96,481 sq.mGFA: 264,000 sq.m (residential)
13,000 sq.m (clubhouse)9,000 sq.m (retail)940 sq.m (kindergarten)
Usage: Mixed-UseTower: 21 residential towers heights ranging from 35 storeys to 15
storeysPopulation: 3,537 residential units, design population 10,680 personsCompleted: 2016
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Wind: Increase ventilation with site planning
01. Manipulate Layout Massing to Increase Wind Flow
Mitigation of District-wide Heat Island Effect & Enhancement of Air Ventilation in the development and its surroundings
Domain of the CFD Model
Heat Island Analysis
Daily temperature variation
Heat Island Analysis
Daily temperature variation
Henderson Land Development Company Limited Proposed Phase 1 Development in Lok Wo Sha Professional Assessment for China GBL 3-Star Rating Credits Assessment - Microclimate Study
- | Issue | 11 January 2012 11JAN2012 MICROCLIMATE REPORT.DOCX Page B8
Figure B 3 Wind profile at 1.5m above ground level in summer (Southwest)
夏季–西南風Summer – SW wind
Henderson Land Development Company Limited Proposed Phase 1 Development in Lok Wo Sha Professional Assessment for China GBL 3-Star Rating Credits Assessment - Microclimate Study
- | Issue | 11 January 2012 11JAN2012 MICROCLIMATE REPORT.DOCX Page B8
Figure B 3 Wind profile at 1.5m above ground level in summer (Southwest)
夏季–西南風Summer – SW wind
冬季-北風Winter – N wind
冬季-北風Winter – N wind
Hybrid Ventilation
in Shopping MallVentilation Effectiveness
inside residential flats
Micro-climate Analysis
within the development site
Air Ventilation in Ma On
Shan and Site’s
surroundings
Mitigation of district-wide
Heat Island Effect by means
of Urban Greenery
Development
Site
Air Ventilation in Ma On
Shan & Site’s surrounding
Micro-climate analysis
within the development site
Ventilation
effectiveness inside
residential flat
Hybrid ventilation in
shopping mall
Mitigation of district-wide Heat Island effect by means of urban greenery
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Wind: Increase ventilation with site planning
03. Connect Open Space
Communal Green Spaces
residents play and relax in same neighborhood; jogging, walking, cycling and other leisure activities plus separation of pedestrian and road traffic, promote a low carbon and healthy lifestyle.
Walking / Jogging Path Shaded sitting-out Area
Water Feature with Artwork
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Wind: Increase ventilation with site planning
04. Arrange Buildings to Channel Wind
•Optimized site planning with benefits to surroundings in mind
•Enhancing good wind resources to the development and neighbourhood
•Refining massing disposition to avoid stagnant ventilation or undue wind amplification
•Outperformed in VR against other major residential zones in HK
Original Scheme
Current Scheme
Current Scheme
Spatial Averaged Range
SVR 0.27 0.12 - 0.42
LVR 0.27 0.11 - 0.47
Domain of the CFD Model
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Wind: Increase ventilation with site planning
05. Building Setback
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Wind: Increase ventilation with site planning
06. Increase Permeability of Building Blocks / No Wall Buildings
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Wind: Increase ventilation with site planning
07. Stepped Building Height Profile
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Wind: Increase ventilation with building design
11. Ventilation Bay / Permeable Podium
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Wind: Increase ventilation with building design
12. Reduce Ground Coverage
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Wind: Increase ventilation with building design
13. Increase Ground Zone Air Volume
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Thermal Radiation: Reduce Direct Solar Radiation
14. Provide Shading for Pedestrian Activities
Holding Nursery
20,000 sq.m. Purchase of local species trees housed in off-
site nursery in China before handover to residents and Visit of Nursery by Senior Management.
Preserved and recreated woodland
Early plant procurement: Achieved "instant effect".
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Thermal Radiation: Reduce Direct Solar Radiation
15. Provide Tree Canopies
Jogging path integrating
with the nature
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Thermal Radiation: Reduce Direct Solar Radiation
17. Shade Open Space by Building Blocks
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Thermal Radiation: Reduce Surface Temperature
18. Use Cool Material for Ground Surface
Sun Shading Analysis
Microclimate (Summer SW wind, 1.5m)Skyview factor (1.5m)
Green Living
Urban Heat Island Mitigation
The 1st residential development in Hong Kong that investigates the Heat Island index via heat island analysis and various computational modelling techniques
Heat Island Analysis consists of:• Local wind / site-wide ventilation
environment• Solar irradiance incident to studied
areas• Latent heat loss• Thermal storage effect of studied area• Material absorptivity• Coverage of vegetation and tree type• Skyview factor
Daily Temperature Variation
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Thermal Radiation: Reduce Surface Temperature
19. Green Wall to Reduce Façade Surface Temperature
Vertical Greenery
• 3 dimensional greenery• Greenery coverage on the Podium façade
(Clubhouse and shopping Arcade)
Green Roof
• Greenery coverage on the whole podium floor including Shopping Arcade
• Clubhouse and Skygarden
Green Roof
on Shopping Mall
Vertical Greeeny
along Podium Walls
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Thermal Radiation: Reduce Surface Temperature
21. Increase Sky View to Improve Night Cooling
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Temperature: Increase Evaporative Cooling
22. Water Features to Increase Evaporation
SEA
LAND
SKY
Symphony
of Nature
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Temperature: Increase Evaporative Cooling
22. Water Features to Increase Evaporation
Symphony
of Nature
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Temperature: Increase Evaporative Cooling
23. Green Wall to Increase Evapotranspiration
“Seamless boundaries”
Greening for Spatial Segregation
Green Hedge Fence wall
along Site Boundary
Green Hedge Fence wall • A row of Ficus Benjamina of 2.5m height• Aerobic filter to the exhaustive gases from traffic.
Green Hedge Fence wall
along Site Boundary
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Temperature: Increase Evaporative Cooling
24. Greening to Increase Evapotranspiration
Extensive GreeningExtensive greening: improves air quality, mitigates heat island effectGreater than 40% of the site is landscaped area comprising
preserved woodlands, recreated woodland parks and
landscaped decks with extensive green roofs, walls and water
features
Newly planted flowering species encourage native insects to thrive,
while native animal life retained by planting of native species
2779Trees planted
>40%Landscaped area
30%All trees are native species
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Artworks Information
in Double Cove residents’
websiteQR Code on Artworks Signage
QR
Code for
plants
Temperature: Increase Evaporative Cooling
24. Greening to Increase Evapotranspiration
Education to Greenery
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Temperature: Increase Evaporative Cooling
25. Use Permeable Paving
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Temperature: Reduce Heat Accumulation
28. Allow Sea Breezes
Summer120m
Annual120m
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Temperature: Reduce Heat Release
29. Reduce Anthropogenic Heat Discharge Near Pedestrian Area
Bicycle Rental Rack with the self-service system
EV charging stations
2 km to Sai Sha Café
10 km to Tai Wai
Station
Green Lifestyle
Health & Well-being Promotion
Podium Level Pedestrian Area
Ground Level Pedestrian Area
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Precipitation: Provide Rain Protection
31. Provide Cover for Rain Protection
24-hour Covered Walkway providing rain protection
connecting from MTR station to all residential blocks
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Thank You!
Actual view from
Double Cove