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Solar Energy--Infinite Source of Power
Renewable or sustainable energy sources such as the wind, the ocean and the sun provide an endless supply of energy without polluting the environment. The Chinese University is a pioneer in using renewable energy, being the first university in Hong Kong to install a solar hot water system for shower facilities.
In 2004, the first set of solar hot water heater was installed in Cheung Chuk Shan Amenities Building of United College and last year, another set was installed in the University Sports Centre. Both sets use evacuated tube heating collectors. The former is smaller with only 11 evacuated tube heating collectors and provides sufficient hot water for 160 showers per day. The latter, with 21 sets of evacuated tube solar heating collectors, has a capacity of 250 showers per day and benefits even the neighbouring Kwok Sports Building.
Compared to the conventional flat-plate type solar heater, this kind of solar collector is more energy-efficient. Its transparent evacuated tubes act like a vacuum flask to minimize heat loss while maintaining the input of heat energy. On a sunny day, the system provides hot water of up to 90¢X. Besides its thermostatic outer layer reduces heat loss to ensure that hot water is available even at night.
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Solar energy can also be used for illumination. The Estates Management Office has installed photovoltaic panels on the roof of the Lady Shaw Building and bus stations. The solar energy is converted into electricity and stored in batteries to power up lights and mosquito lamps. 
