氮气多层微槽道J-T效应制冷器性能实验研究

发布时间：2018-11-06 13:45

【摘要】：本文将多层矩形微槽道与焦汤制冷器两种结构结合制作了多层微槽道J-T效应制冷器,回热段设置高低压矩形通道各三层交叉叠放。以氮气为制冷剂,采集其在多层微槽道J-T节流制冷器各测点温度,分析氮气在制冷系统各阶段的降温特性,对比氮气与氩气在微槽道J-T效应制冷器中的实验结果。结果表明:当进口压力为4~8 MPa时,随着压力的增大,氮气冷端温度越低,达到稳定冷端温度的时间越短;当进口压力为8 MPa时,氮气冷端在200 s左右趋于稳定温度约1.7℃;在相同进口压力下,氩气冷端温度低于氮气,但氮气达到冷端温度的时间比氩气更短;进口压力为7 MPa时,氮气冷端温度稳定时间比氩气提前约450 s;进口压力8 MPa的氮气与4~5 MPa的氩气温降相近,且氮气的降温时间更短,可以考虑用氮气代替氩气以减少制冷成本。
[Abstract]:In this paper, a multi-layer microchannel J-T effect cooler is made by combining the multi-layer rectangular microchannel with the coke soup cooler. The regenerative section is set up with three layers of cross stacking in the high and low pressure rectangular channel. With nitrogen as refrigerant, the temperature of the multi-layer micro-channel J-T throttling cooler was collected, the cooling characteristics of nitrogen in different stages of refrigeration system were analyzed, and the experimental results of nitrogen and argon in the micro-channel J-T effect cooler were compared. The results show that when the inlet pressure is 4 ~ 8 MPa, the lower the temperature of the cold end of nitrogen gas, the shorter the time to reach the stable end temperature with the increase of the pressure, and when the inlet pressure is 8 MPa, the temperature of the cold end of nitrogen gas tends to be about 1.7 鈩，

本文编号：2314450