集热器对太阳能喷射制冷系统性能的影响

采用寿命期性价比对单、双层盖板平板集热器、全玻璃管、热管真空管及CPC聚焦型集热器对喷射式制冷系统的性能影响进行了评价,并与采用设计工况性价比指标的评价结果进行对比分析。结果表明,寿命期性价比评价指标考虑了太阳辐射与气温变化,比设计工况性价比评价指标更全面、更符合实际情况;双层盖板平板集热器用于太阳能喷射式制冷系统,寿命期性价比最优;CPC聚焦型太阳能集热器热性能最优,在相同制冷量下,所需集热面积最小,可节省安装空间。

The Effect of Collectors on the Solar Ejector Refrigeration System

The effects of five collectors,a single-glazed flat plate collector,a double-glazed flat plate collector,a evacuated glass-tube collector,a heat pipe vacuum-tube collector and a CPC vacuum-tube collector,on the solar ejector refrigeration system are assessed by use of the ratio of system cost to cooling capacity in life span(R2).The result shows that it is more reasonable and practical to evaluate collectors by R2 in consideration of variation of solar radiation and air temperature than by the ratio of system cost to cooling capacity under design conditions(R1).The R2 of the double-glazed collector is the best and the collector area of the CPC vacuum-tube collector needed by solar refrigeration system is the least.