气液分离式管内凝结冷凝器的实验研究

摘要

A new liquid-vapor separation condenser is designed in this paper.The condenser is test-ed in a standard cooling system and compared with the horizontal shell-tube condenser (HSC)in their heat-exchange performance.The results show that the heat transfer coefficient of the in-tube-condensation liquid-vapor separation condenser (ILSC)increases linearly when the mass flow rate varying from 220-330 kg/h and the saturated temperature is at 35 ℃,40 ℃ and 45 ℃. Moreover,the heat transfer coefficient of the condenser is considerably higher than the HSC.In addition,when the condenser of the cooling system is displaced with the newly-designed one,the pressure drop of the refrigerant between the inlet and outlet is decreased 45.1%-50.7%.The exhaust pressure and the COP (Coefficient of Performance)increased 1.9% and 5.0%-9.3%, respectively.In conclusion,ILSC possesses better heat transfer performance than the HSC and makes the cooling-system efficiency improved.%设计了一种新型气液分离式管内凝结冷凝器,对该冷凝器进行了实验测试,并与卧式壳管式冷凝器进行了对比分析.研究结果表明：在质量流量为220~330 kg/h,饱和温度为35℃、40℃和45℃时,气液分离式管内凝结冷凝器的传热系数线性增大.在高质量流量下,其传热性能明显优于卧式壳管式冷凝器.实验条件范围内,采用气液分离式管内凝结冷凝器的系统比采用卧式壳管式冷凝器的系统制冷剂的出、入口压降降低了45.1%~50.7%,排气压力提高了约1.9%,COP 提高了5.0%~9.3%.气液分离式管内凝结冷凝器具有更好的换热性能,有效提高了系统的效率.