CB 860-07-08(05) Legislative Council Development Panel Tamar Development Project.pdf
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1、For information Legislative Council Development Panel Tamar Development Project PURPOSE In response to the request of the Legislative Council (LegCo) Development Panel, this paper provides detailed information regarding the Tamar Development Project. ENVIRONMENTALLY FRIENDLY FEATURES 2. The Tamar De
2、velopment Project has incorporated a variety of environmentally friendly features to make it a green and sustainable project and a paragon of green government building. When commissioned, we are confident that the Tamar complex would be one of the greenest government buildings in Hong Kong. Overall
3、Design 3. The overall design illustrates a careful consideration of the surrounding environment. The buildings, i.e. the LegCo Complex, the Low Block and the Office Block of the Central Government Complex (CGC), are positioned in the eastern, western and southern sides of the site respectively. The
4、disposition of the buildings forms a major breezeway from the harbour to the inner city area. The design of the CGC Office Block as an “Open Door” with principal north-south orientation optimizes the harnessing of daylight and inter-block shading against sunlight for indoor spaces. 4. The north-sout
5、h layout of the open space, i.e. the Green Carpet, enhances visual permeability through the site and maintains good air ventilation in the area even after the buildings are constructed. Green Features 5. The design has proposed the adoption of a number of green features such as Green roofs and sky g
6、ardens; CB(1)860/07-08(05) - 2 - Photovoltaic panels; Water features, such as a lily pond outside LegCo dining hall, reflecting pool and a floating platform adjacent to the CGC Low Block, to provide evaporation cooling effect; and Vertical planting walls at suitable areas such as CGC Low Block to im
7、prove thermal insulation of the building and street landscape environment. Other vertical planting will be applied to outdoor parapet walls. Energy-saving features Building Services 6. The use of energy-efficient building services will help reduce the consumption of energy in operations. The followi
8、ng features have been proposed High energy efficient sea water cooled chiller plants it employs sea water for heat rejection, which is a more energy efficient air-conditioning system than the air cooled system and water cooled system using cooling towers; Use of variable speed drives for the air-con
9、ditioning equipment the chilled water and conditioned air supply of air-conditioning system will be varied with the aid of variable speed drives to meet the actual loading demand in the building, achieving optimum energy usage; Free-cooling design in the air-conditioning system the free-cooling feat
10、ure allows reduction of air-conditioning system operation as well as the energy consumption when the outdoor air condition is suitable for cooling the building; Heat wheels installation to reclaim waste heat from exhaust air the heat wheel installation is used to pre-cool the fresh air supply to the
11、 buildings by reclaiming the energy from the exhaust air before the latter is discharged out of the buildings in order to save energy; - 3 - High efficiency motors motors installed will be of the highest energy efficiency class; and Service-on-demand escalator it operates only when the presence of p
12、assengers is detected to achieve energy saving. Water-saving measures 7. There will be a rainwater recycling system whereby rainwater will be collected and directed to a holding tank for irrigation of planting areas, thereby reducing the use of potable water. The irrigation is undertaken through a s
13、ubsurface drip system that avoids spray to and contact with humans, and minimizes loss of water due to evaporation. 8. Other proposed features that save the use of water include dual flushing cistern of 4/6 litres there are two buttons in the flushing system, one for a full flush and one for a half
14、flush; urinal flushing with infra-red sensor; and water tap with infra-red sensor. Lighting 9. The design has proposed the use of Daylight Sensor Control for office lighting. The lighting level of peripheral offices will be automatically adjusted according to the daylight penetrated to the office so
15、 as to save lighting electric energy. There will also be a Computerized Lighting Control system integrated with timer control function to monitor and control lighting. 10. A Motion Sensor Control will be incorporated to detect occupancy condition of the office space. It will automatically switch off
16、 office lighting as well as the air-conditioning system when there is no occupancy in office to save energy. 11. The following will be used to further enhance energy savings in respect of lighting High efficiency lamp source and electronic ballast (e.g. T5 fluorescent lamp); and - 4 - LED Exit Signs
17、. Reduction of peak demand of electrical load 12. A demand side management control will be built in the Building Energy Management system which will facilitate the building management staff to monitor the operating performance of building services installations and to prioritise optimum operation of
18、 the corresponding equipment to reduce the peak demand of electricity. Waste management 13. To maintain a clean working environment and facilitate recycling, there will be an Automatic Refuse Collection System which collects and transports presorted waste and recyclables in a fully automated enclose
19、d vacuum system. Contact with refuse and containers is minimized, thereby improving safety and hygiene. Separate hoppers will be provided in the refuse chute room(s) on each floor for different types of waste. A refuse storage and material recovery chamber will also be provided separately. Building
20、materials 14. The project has also incorporated a number of environmentally friendly/energy-efficient building materials, including Double-layer ventilated facade design air movement is generated between the glass facades, providing natural ventilation and cooling effect to the building; Non-reflect
21、ive, clear and tinted insulated glass unit with low-E (low emissivity) coating will be adopted in all buildings and shading devices will be provided; Modular system (e.g. demountable partitions, raised floor), in which modular units can be reused in layout alterations, minimizing wastage; Reusable f
22、ormwork (i.e. the “moulds” to form concrete slabs, columns or beams, etc.) are to be made of metal or other reusable materials instead of timber. Metal formwork is - 5 - durable and hence more reusable. Metal formwork is usually adopted for repetitive structural units such as those for multi-storey
23、office buildings with repetitive typical floor plans. Timber products (i.e. timber panel, timber flooring, etc.) from sustainable forest or plantation; and Wood materials with low emission of formaldehyde (methanol) complying with Class E1 of international standard1, non-PVC wall covering and buildi
24、ng materials such as paint, carpet adhesive etc. with low VOC (Volatile Organic Compounds). Curtain Wall 15. The external envelope of CGC Office Block, CGC Low Block and LegCo Complex will adopt a curtain wall facade. The estimated window area is around 25,000sqm to 30,000sqm subject to design devel
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- CB 860-07-0805 Legislative Council Development Panel Tamar Project 860 07 08 05
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