Holistic Approach in Delivering Government Buildings The Low Carbon Concept

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1 International Conference on Planning for Low Carbon Cities 22 May 2009 Holistic Approach in Delivering Government Buildings The Low Carbon Concept Ir. HO Sai-king, Assistant Director (Building Services), Architectural Services Department, The Government of The Hong Kong Special Administrative Region 1

2 Introduction Climate change has been attracting worldwide discussions. Combating Climate change requires actions on all fronts. The mainstays are in the areas of enhancing energy efficiency, using clean fuels, reducing reliance on fossil fuel and promoting a low carbon economy. 2

3 Introduction Architectural Services Department is responsible for : Planning Designing Procuring and Maintaining all Government buildings and public facilities except public housing projects. 3

4 Building Planning Energy Conservation and Efficiency Measures Optimal Use of Natural Resources Environmental Friendly Materials Waste Management Procurement Practices 4

5 Building Site Planning Maximizing topographical resources such as: appropriate access to solar energy adoption of natural ventilation access to daylight design to suit the site profile to reduce slope cutting, etc. 5

6 Stanley Municipal Building Building was designed to suit the site profile to minimize site formation. 6

7 Building Planning Enhancing access to building to encourage the use of public mass transportation system. Rooftop and vertical greening in new projects are considered whenever practicable. 7

8 Holistic Approach in Delivering Government The Headquarters of the Electrical and Mechanical Services Department The green roofs provide thermal & acoustics insulation and also as amenity & social hub. 8

9 Tai Lung Laboratory Area of green roof ~ 400 m 2 (of 780 m 2 possible roof area). 9

10 Energy Conservation and Efficiency Measures Orientation of building is carefully studied to make use of positive effects of solar radiation, daylight utilization, wind patterns and views. Considerations on sunshade, insulation and glazing have also been made during envelope design to optimize energy performance. 10

11 Stanley Municipal Building The curtain wall on the south-facing façade is composed of an aluminium louvre screen and double-height vertical planting area in front of the glass wall. In summer the metal sun screen and plantings screen off direct sunlight. 11

12 In winter, solar gain through the sun shading device warms up the interior to save heating cost. 12

13 Stanley Municipal Building The courtyard provides a well-ventilated atmosphere on bright sunny day, and in winter it serves as a vent shaft facilitating cross ventilation and allowing natural airflow throughout the indoor space. 13

14 14 Holistic Approach in Delivering Government

15 A glass floor at the centre of the courtyard allows natural day light to penetrate into the community hall at the lower ground of the building. 15

16 Energy Conservation and Efficiency Measures All new projects design to achieve an OTTV not more than 23 W/m 2 (c.f. statutory requirement of 30 W/m 2 ). Adoption of energy efficient building services systems. 16

17 International Wetland Park Phase II Green roof and orientation of the building allow the envelope of the Visitor Centre to achieve an OTTV of 16W/m 2. 17

18 Energy efficient building services systems such as T5 fluorescent lamps with electronic ballasts, variable speed motor drives, and water cooled air conditioning systems are adopted in projects. 18

19 Optimal Use of Natural Resources Suitably utilize daylight and natural ventilation. Incorporation of renewable energy installation. Adopt water saving devices such as dual flush water cisterns, sensor type water taps and push type water taps. Adoption of rainwater or grey water recycling systems in project where appropriate. 19

20 The Headquarters of the Electrical and Mechanical Services Department The peak generation capacity of the photovoltaic system is 350 kw, which is one of the largest systems of its kind in Hong Kong. 20

21 A 30 classroom Primary School at Ma Wan The PV system of the primary school in Ma Wan has a generating capacity of about 40 kw. Photos taken by The University of Hong Kong 21

22 Environmentally Friendly Materials Timbers (either softwood or hardwood) used in project are required to come from a known licensed source or the timber must possess FSC (Forestry Stewardship Council) certificate. The maximum allowable VOC content in paints is specified in the General Specification for Building. 22

23 Public Facilities for Pak Shek Kok Waterfront Promenade A vertical timber screen in the shape of sail faces is erected at the refreshment kiosk serving as an architectural features as well as shading. 23

24 Waste Management Space allowed for waste handling and ease for collection of recycling wastes. Hazardous wastes are properly handled in accordance with relevant guidelines and regulations to avoid damaging spillover to the environment. Reusing existing structural provision on site. 24

25 Science Park Phase 1 The Centralized Automatic Refuse Collection System (ARCS) links all buildings and automatically collects and segregates common commercial refuse and recyclable paper. 25

26 Holistic Approach in Delivering Government The Headquarters of The Electrical and Mechanical Services Department The conversion of the former air cargo terminal at Kai Tak area into the Electrical and Mechanical Services Department Headquarters have saved a large amount of energy and building materials. 26

27 Procurement Practices Mandatory incorporation of environmental specifications in contracts (e.g. pay for environment scheme, waste management plan, etc). Close monitoring of service suppliers. Annual awards to contractors to encourage environmentally conscious attitude in carrying out works. 27

28 Continuing development Public demand for better environment and awareness on sustainability development are rising. Promoting low carbon economy as a response to the climate change issue has become a global trend. Integrated efforts are required from designers, contractors, and suppliers. ArchSD will continue its contribution in striving for promotion of a low carbon economy in Hong Kong. 28

29 We will make early preparations to meet the challenge of climate change. In particular, we will enhance energy efficiency, use clean fuels, rely less on fossil fuel, and promote a low carbon economy an economy based on low energy consumption and low pollution. The Policy Address Embracing New Challenge 29

30 30 Thank you

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