A solar-powered air-conditioning system using heat-pipe evacuated tube collectors with cooling capacity of 360 kW was designed and constructed for an office building in Beijing, China. The heat-pipe evacuated tube collector was developed by the Beijing Solar Energy Research Institute and manufactured by the Beijing SUNDA Solar Energy Technology Co., Ltd. The solar collector array has a total aperture area of 680m~2. Solar collectors supply hot water at about 88 °C to a lithium-bromide absorption chiller made in China. After measuring, COP of the absorption chiller is around 0.75. In order to reduce heat losses of storage tank, both hot-water storage tank and chilled-water storage tank are adopted. The system has been successfully operated and practically applied since 2004. The system possesses a bi-function of space cooling in summer and space heating in winter. Practical operating results showed that during space-cooling period, the average collector efficiency reached 45.1% and the average solar fraction was about 82.2%; during space-heating period, the average collector efficiency reached 42.2% and the average solar fraction was about 70.0%. It means that the solar air-conditioning system could meet most of space cooling and space heating requirements of the office building.
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机译：设计并为中国北京的办公楼设计和建造了使用热管抽空管收集器的太阳能空调系统，为360千瓦设计。北京太阳能研究所开发的热管疏散管收集器由北京Sunda Solar Energy Technology Co.，Ltd.制造太阳能收集器阵列具有680m〜2的总孔径面积。太阳能收集器在大约88°C下供应热水至中国制造的锂溴吸收冷水机。测量后，吸收冷却器的COP约为0.75。为了减少储罐的热损失，采用热水储罐和冷却储水罐。自2004年以来，该系统已成功运行和实际应用。该系统在夏季拥有夏季和冬季空间加热的空间冷却双功能。实用运营结果表明，在空间冷却期间，平均收集器效率达到45.1％，平均太阳能级数约为82.2％;在空间加热期间，平均收集器效率达到42.2％，平均太阳能分数约为70.0％。这意味着太阳能空调系统可以满足办公楼的大部分空间冷却和空间加热要求。
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