余隙容积对往复式压缩机性能的影响

往复式压缩机的制冷量可通过余隙容积调节,为研究余隙容积及中间余隙容积对往复式压缩机性能的影响,本文在蒸发温度为-23.3℃、冷凝温度为54.4℃的工况下,以余隙容积为变量,通过单一变量法对制冷量、COP等性能参数进行实验研究。研究结果表明:余隙容积或中间余隙容积增大时,能效呈先增大后减小的趋势,并且增加中间余隙容积对能效的提升比增加余隙容积更优。其中,相对余隙为0.56%~0.73%时,往复式压缩机的性能具有最大值,COP提升0.62%;相对中间余隙为18%时,制冷量下降10%,同时COP提升1.31%。此外,增加中间余隙容积,还有助于降低压缩机的排气温度。

Influence of Clearance Volume on Performance of Reciprocating Compressor

The cooling capacity of a reciprocating compressor can be finely adjusted using the clearance volume.To study the influence of the clearance volume and the intermediate clearance volume on the performance of the reciprocating compressor,the clearance volume was taken as a single variable to investigate the relationship between parameters such as the cooling capacity and COP and clearance volume under the designated conditions(evaporation temperature of 23.3℃and condensation temperature of 54.4℃).The result shows that when the clearance volume or the intermediate clearance volume increases,the COP first increases and then decreases,and increasing the intermediate clearance volume is better than the clearance volume for increasing the COP.Among them,when the relative clearance is 0.56%-0.73%,the performance of the reciprocating compressor reaches the maximum value,and the COP can be increased by 0.62%.When the relative intermediate clearance is 18%,the cooling capacity can be reduced by 10%,and the COP increases by 1.31%.In addition,increasing the intermediate clearance volume also helps reduce the exhaust temperature of the compressor.