一种高效率的混合物工质J—T制冷机的实验研究  

Experimental Investigation of An Efficient Mixed-refrigerant J-T Cooler

作　　者：罗二仓[1] 周远[1] 

机构地区：[1]中国科学院低温实验技术中心

出　　处：《低温与超导》1996年第3期46-53,共8页Cryogenics and Superconductivity

基　　金：国家自然科学基金

摘　　要：该文对采用混合物工质（Ｎ２＋ＣＨ４＋Ｃ２Ｈ６＋Ｃ３Ｈ８）的Ｊ一Ｔ制冷机做了系统的试验研究．实验研究了在不同的排气压力、不同的进气压力及不同的热端进气温度下，该种混合物Ｊ—Ｔ制冷机的热力性能。试验表明，在８０Ｋ—９０Ｋ的低温区间，该种混合物Ｊ—Ｔ制冷机是一种效率很高的制冷机，它比采用单纯氮工质的Ｊ—Ｔ制冷机的热力性能要优越得多，其热效率相当于现代的Ｓｔｉｒｌｉｎｇ制冷机。高压工作在３．０ＭＰａ－６．０ＭＰａ之间，低压在０．１ＭＰａ—０．１２ＭＰａ之间，制冷温度在８０—８２Ｋ左右，其整机的效率达１０％左右，比采用纯氮工质的Ｊ—Ｔ制冷机效率高出３～５倍以上。因此，采用混合物工质是提高Ｊ—Ｔ制冷机效率的有效途径。A mixed-refrigerant J-T cooler using gas mixture(N2 +CH4 +C2H6 +C3H8 ) is experimentally investigated in this paper,In the oxperiment,the influence of different discharging pressures and sucking pressure.of compressor and different hot-end temperature of heat exchanger on thermodynamic performance of the J - T cooler have been done experimentally.Experiment re.ult. .how that the mixed-refrigerant cooler has higher efficiency and is much more better than pure-nitrogen J-T cooler at tomperature range of 80K to 90K. And the cooler is nearly equivalent of modern Stirling cooler by thermodynamic perfomance, When working at condition of discharging pressure from 3. OMPa to 6. 0MPa and sucking pressure from 0, 1MPa to 0. 12MPa, the mixed-refrigerant cooler can achieve the temperature of 80K to 82K and thermal excergy efficiency of 10%, 3 to 5 time. of pure-nitrogen cooler. Consequently, using mixed refrigerant is effective way to improved the thermodynamic performance of J - T cooler.

关 键 词：制冷机 J-T制冷机 混合工质 

分 类 号：TB651[一般工业技术—制冷工程] TB64