太阳能制冷与供暖系统的设计与比较

根据上海的气候条件，以上海地区某写字楼为对象，提出4种太阳能驱动的溴化锂吸收式与电动蒸汽压缩式热泵联合制冷与供暖系统。这4种系统分别由热管式真空管集热器或抛物面槽形聚光集热器，单效或双效溴化锂吸收式制冷机，以及风冷热泵或水源热泵构成。分析比较这4种系统的节能型和经济性的结果表明，采用抛物面槽形聚光集热器＋双效溴化锂吸收式制冷机＋风冷热泵组成的系统，同时具备较好的节能性与经济性，一次能源利用率可降低约50％。

Design and Comparison of Solar Powerd Cooling and Heating Systems

Four types of combined cooling and heating system consisted of solar powered absorption chiller and electric vapor compression heat pumps, were designed for an office building under Shanghai climate conditions in this paper. The four systems include heat pipe evacuated tube collectors or parabolic trough concentrating collectors, single or double effect LiBr-H2O absorption chiller, air cooling heat pump or water source heat pump respectively. Comparison of abilities for energy saving and economic analysis were conducted for the four systems. It is shown by the results that the system including parabolic trough concentrating collectors plus a double effect LiBr- H2O absorption chiller and a air cooling heat pump, performances well in both of the above two aspects. The primary energy ratio is reduced by about 50 percent.