中文摘要：

为需要较低温度的用冷空间提供冷源,设计由太阳能集热循环,水蒸气喷射制冷循环,CO2低温制冷循环组成的太阳能辅助热源水蒸气喷射引射冷却的CO2低温制冷的组合循环,通过热力计算得出随着蒸发温度的升高,太阳能辐射强度的增大,集热器面积的增大,组合循环的性能提高。蒸发温度每升高1℃,组合循环的性能系数增大4.3%,太阳能辐射强度每增加1W/m2,组合循环的性能系数增大2.8%,太阳能集热器面积每增加1m2,组合循环的性能系数增大约6%。发生器内水蒸气温度对组合循环的性能影响不大,太阳能辐射强度、集热器面积以及喷射器引射率对组合循环的影响较大。组合循环节省运行费用,节约能源,有很好的发展前景。

英文摘要：

The combined cycle of solar energy - driven water vapor ejector entrainment cooling CO2 refrigeration cycle is deo signed for providing low temperature space. This combined cycle is composed of solar energy heat-collecting cycle, water vapor e- jector refrigeration cycle and CO2 low temperature refrigeration cycle. By thermodynamic calculation, the＇results are obtained that the COP of combined cycle increase as the enhancing of evaporation temperature, solar energy radiant intensity and solar collector area. When the evaporation temperature increase 1℃, the COP of combined Cycle enhance about 4.3%, the radiant intensity of solar energy increase 1 W/m2 , the COP of combined cycle enhance about 2.8%, and the solar collector area increase lm2, the COP of combined cycle enhance ＇about 6% o However, the effect of water vapor temperature in generator on the performance of combined cycle is not obvious. Moreover the effect of the solar energy radiant intensity, the solar collector area and the ejector entrainment ratio are higher on the COP of combined cycle. It is gained that the performance of combined system has obvious ad- vantage for reducing running cost and saving energy, so the combined system has good future.