Low Carbon Building Design
As the majority of the total Greenhouse Gas (GHG) emissions are related to buildings, the term "energy efficiency" in buildings has been regarded as an enormous opportunity for cost reduction and reducing greenhouse gas emissions within our community. Over the years, we put substantial efforts to look into opportunities for carbon reduction in our development projects as we believe that low carbon building design will help us build a sustainable future.
To echo the Building Energy Efficiency Ordinance which has been come into effective since September 2012, we, as the technical adviser of the Government, support the initiatives by taking the lead to implement energy efficiency measures in our buildings.
Energizing Kowloon East Office
The Energizing Kowloon East Office (EKEO) has been established with an aim to steer, supervise, oversee and monitor the development of Kowloon East, with a view to facilitate its transformation into another premier Central Business District of Hong Kong.
The construction of EKEO building has been completed in just six months, taking three months of our concerted effort in design and another three months for construction. The self-contained and cost-effective EKEO building not only provides an efficient workspace for the EKEO team, but it also showcases a new sustainable design concept with low carbon footprint.
Having attained the highest provisional BEAM Plus Platinum rating, the EKEO building achieves the following environmental benefits:
- About 33% or 48,500 kWh per year reduction of annual energy consumption;
- About 37% reduction in peak electricity demand;
- About 58% or 805,000 L per year reduction in fresh water consumption by harvesting rainwater for irrigation;
- About 22% or 51,600 L per year reduction in flushing water demand by using low flow urinal and dual flush toilets;
- About 69% or 10,500 kg of construction waste recycled or reused; and
- About 50% of building materials are prefabricated.
Modular construction approach is adopted for building the office, using recycled freight containers and other steel structures which enable greater flexibility in layout changes. These materials can be easily dismantled and reused elsewhere at the end of the building's life. Compared with other freight containers that have been used as temporary offices, the design of EKEO has achieved a much higher architectural standard, offering an attractive and sustainable piece of architecture with comfortable working environment.
The EKEO has adopted passive designs to significantly reduce energy consumption for ventilation and air conditioning. Most of the building was smartly constructed under the Kwun Tong Bypass to minimise heat gain from the sun thus keep the building cool. The adoption of perforated walls on the southeast side with corresponding windows can encourage natural ventilation and cooling breezes into the offices.
To further enhance carbon reduction, the EKEO building adopts dual flush toilets and low-flow taps and installs traditional wisdom of harvesting rainwater for irrigation to ensure only what is needed is used. In addition, paving blocks used within the site are made from recycled aggregate, glass and fly ash from power plants.
Cruise Terminal Building and Ancillary Facilities for the Kai Tak Cruise Terminal Development
The project comprises the development of new cruise terminal facilities on a site of 7.6 hectares at the southern end of the former runway at the Kai Tak Airport. The scope of works includes constructing the cruise terminal building and the associated apron facilities.
The new cruise terminal building will provide a great variety of facilities in supporting the operation of the cruise terminal such as Customs, Immigration, Quarantine and Police (CIQP) services, security screening, baggage handling, ticketing, check-in, passenger waiting or queuing, concourses, etc. Apron facilities cover building services of passenger gangways, electricity supply systems, on-shore water supply and sewage reception facilities, external lighting, navigation lighting, fire fighting provisions, etc.
Various forms of energy efficient features have been adopted. These include:
- automatic demand control of chilled water circulation system, air supply and control for ventilation fans in car park;
- demand control of fresh air supply with carbon dioxide sensors;
- heat wheels for heat energy reclaim of exhaust air;
- connection to District Cooling System for air-conditioning;
- T5 energy efficient fluorescent tubes with electronic ballast and lighting control by occupancy sensors and daylight sensors;
- services-on-demand control for escalators and passenger conveyors (on/off control);
- heat pumps for hot water/space heating;
- building energy management system for large installations; and
- photovoltaic system and solar hot water system.
In addition to facilities for cruise passengers, the terminal building features a landscaped deck of about 23,000 m2, which will be one of the largest public roof gardens in Hong Kong, as well as an ancillary commercial area of 5,600 m2. The landscaped deck will serve as a good spot for cruise passengers and local residents to meet and enjoy the spectacular panoramic view of the Victoria Harbour.
The terminal building has received the first cruise liner in June 2013 and it will be in fully operation at a later stage.