蒸汽喷射-压缩循环制冷系统的数值研究

Numerical study on steam injection/compression cycle refrigeration system

将喷射器作为压缩机辅助升压装置引入单级蒸气压缩制冷系统,通过建立喷射器一维数学模型和蒸汽喷射-压缩循环制冷系统模型,研究了喷射器工作压力和引射压力、蒸发温度和冷凝温度对蒸汽喷射-压缩混合制冷循环系统性能的影响。结果表明:冷凝温度从25℃增加到43℃,蒸发温度Te=-20、-25和-30℃时,系统COP分别减小了32. 5%、42. 9%和56. 8%。当冷凝温度Tc=31、34℃时,蒸发温度从-35℃升高到-5℃,系统COP分别增加了32. 5%和28. 6%。

The ejector was introduced into the single stage vapor compression refrigeration system as an auxiliary booster for the compressor. By establishing a one-dimensional mathematical model of the ejector and a model of a steam injection/compression cycle refrigeration system,the effects of the ejector working pressure,eject pressure,evaporating temperature and condensing temperature on the performance of the steam injection-compression hybrid refrigeration cycle system were theoretically studied.The results show that the condensing temperature increases from 25℃ to 43℃. When evaporation temperature Teequals-20,-25 and-30℃,the system COP is reduced by 32. 5%,42. 9% and 56. 8% respectively. When the condensation temperature Tcequals 31℃ and 34℃,the evaporation temperature increases from-35℃ to-5℃,and the system COP increases by 32. 5%and 28. 6% respectively. When the condensation temperature is 31℃ and 34℃,the evaporation temperature increases from-35℃ to-5℃,and the COP of the system increases by 32. 5% and 28. 6% respectively.