Changi Air Base Hangar
GreenA was the ESD Consultant for the Changi Air Base Hangar and successfully helped the project attain the Green Mark Platinum, Net Positive Energy award.
LOCATION: CHANGI, SINGAPORE
Interior image of Changi Air Base Hanger (Image by The Straits Times)
As part of the Singapore Armed Forces’ push to be more environment-friendly, they conceptualised the creation of one of the first net-positive energy buildings. This vision was brought to reality through the construction of the new 8 storey hanger that produced more energy than what it consumed.
The hanger can generate 1,255 MWh of electricity each year – enough to power 273 four-room Housing Board flats. It produces 30% more energy than it requires and the excess energy is being used for other parts of the base.
Energy saving and Sustainable measures used in the Changi Air Base Hanger (Graphics -MINDEF)
The hanger was designed keeping active and passive energy saving strategies used during its design and construction phase. Some of these strategies are-
Increase the Use of Natural and Efficient Lighting
We were able to increase the infiltration of natural lighting into the hanger by using a fabric door. This translucent surface not only elevated the aesthetics of the interior space, but it also doubled up as the perfect blind against the strong rays of sunlight that Singapore enjoys. We capitalised on this and provided energy efficient lighting fixtures that further reduced the energy consumption in providing lighting inside the hanger.
Green roof over the Changi Air Base Hanger (Image by The Straits Times)
Creation of Green Roof
We have all felt the difference between the heat radiated from non-shaded pavement and green lawns. The hangar features a green roof with carpet grass that insulates the building against solar heat gain. The moist soil under the grass acts as a layer against heat and in turn reduces the need for air-conditioning. Along with behaving as a heat barrier, this space doubles up as a recreational space for our (service men).
Water Savings and Efficiency
Did you know that Singapore receives on an average of 2,340mm of rain every year? The hanger collects this water and reuses it for general washing, flushing of toilets, and the irrigation of the green roof. Together with this, we have reduced the water consumption by using water efficient fittings. MINDEF estimates that the building will save an equivalent of water consumption of 28 four-room flats each year.
Natural ventilation and mechanical ventilation systems
By orienting the hanger along the north south axis, we were able to take advantage of the prevalent wind movement. By installing louvers on the north and south sides of the building and highly efficient mechanical ventilation systems, the hanger experiences a well-ventilated space with a constant flow of fresh air.
Interior image of Changi Air Base Hanger (Image by The Straits Times)
Keeping on track with MINDEF’s Sustainability plan to reduce our ecological footprint, MINDEF will be taking the following steps
Green Transportation
MINDEF will replace its 400 administrative vehicles with hybrid models by 2023, reducing carbon emissions by up to two-thirds per vehicle. Eventually, MINDEF will be using electric vehicles once Singapore’s charging infrastructure is built up.
Overseas facilities
Beyond Singapore, MINDEF is also working its counterparts in Australia to incorporate environment sustainable design into its overseas facilities. This includes solar powered lighting and building materials with high recycled content.
“In the grand global scheme of changes necessary to mitigate climate change, our total reduction of carbon dioxide emissions might be considered insignificant, but all agencies and countries must start on this road to recovery” Mr Teo added.
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