中文摘要：

由于单效溴化锂吸收制冷循环受太阳能热源温度较低的限制，需要采用适当的辅助手段。本文对增压辅助型太阳能溴冷机循环流程提出了在冷凝器前加装隔离阀的改进方案，该方案可降低发生压力，以充分利用低温热源，并可有效回收压缩功。通过计算分析了改进循环的热力系数COP与热源温度和循环溶液质量分数差的关系。给出了在不同的热源温度下对应的最佳发生压力的调整范围。

英文摘要：

The limitation of the single-effect LiBr absorption chilling circle driven by the low temperature solar energy heat source require adopting auxiliary means for proper operation. A modified compressor assisted scheme by adding an isolating valve ahead of the condenser is presented in this paper, which decreases the generating pressure to make sufficient use of the low temperature solar heat source as well as to reclaim the compression work. Based on the calculated results, a relationship of the coefficient of performance （COP） of the modified cycle with heat source temperature and concentration difference between rich and dilute solutions is presented, and the adjusted range of the optimum generation pressure in accord with the heat source temperature is obtained.