Hong Kong airport rejigs air conditioning to save HK$5m a year
HK$20m project will make system more energy efficient and pay for itself in 4 years
Hong Kong International Airport hopes to save around HK$5 million a year on its electricity bill after completing a HK$20 million project to make its air conditioning system more energy efficient.
Ricky Leung Wing-kee, the airport's general manager of technical services, said the savings have been made after changing the configuration of the systems so that Terminal One at Chek Lap Kok and the ground transportation area were linked, as were Terminal Two and the office towers.
It means the systems, which reduce air temperature by passing it through cold sea water, have more flexibility, especially as Terminal One no longer relies solely on large chillers.
By linking the Terminal Two system with the office towers, the two chillers supporting the tower could be switched off at night.
The rearrangement is estimated to save 5 million kilowatts of electricity a year, accounting for 3 to 4 per cent of total usage.
At commercial rates for electricity, that would save the airport HK$5 million a year. "Carbon emissions can also be reduced by 3,000 tonnes," Leung said.
The airport is also changing its lamp lighting to LED. All 100,000 lamps should be replaced by 2014, which will save another 15million kW of electricity a year.