混合物和纯氮工质在一种 JT 节流制冷机上热力性能的对比实验  

Experimental comparison of thermodynamic performance of mixed refrigerant and pure nitrogen in an opened cycle JT cooler

作　　者：罗二仓[1,2] 周远[1,2] 周赞熙 张文全[1,2] 

机构地区：[1]中国科学院低温技术实验中心 [2]航天总公司三院8358所

出　　处：《低温工程》1997年第2期5-9,共5页Cryogenics

基　　金：国家自然科学基金

摘　　要：报道了采用混合物工质及纯氮工质在一种开式快速ＪＴ节流制冷机上的实验对比研究。采用纯氮工质在压力为１１．０Ｍｐａ左右，该ＪＴ节流制冷机可获得的最低温度为８３～８４Ｋ，启动时间在７５ｓ左右；而采用混合物工质后，在压力为５．０ＭＰａ左右，该制冷机可获得７３～７４Ｋ的最低温度，降温时间与纯氮相当。实验结果表明，采用混合物工质将会较大地改善该种ＪＴ节流制冷机的热工性能。This paper first reports the experimental comparison results of thermodynamic performance of an open cycle JT cooler with mixed refrigerant and pure nitrogen in China. In the experiment, the JT cooler can achieve the lowest temperature of 83～84K and the cool down time of 1.3 minutes when pure nitrogen works at 11.0 ～ 12.5 MPa. However, the same JT cooler can achieve the lowest temperature of 73—74K and 2 minutes of cool down time when the mixed refrigerant used works only at the lower pressure of 4.0 ～ 6.0 MPa. The calculation results of thermodynamic cycle also show that using mixed refrigerant has about two times of cooling capacity compared with using pure nitrogen.

关 键 词：混合物工质 节流制冷机 制冷机 纯氮工质 

分 类 号：TB651[一般工业技术—制冷工程] TB64