摘要
针对当前油分离器油分离效率不高的问题,为保证自复叠制冷系统的稳定运行,根据传统的油分离器分离原理和精馏原理,提出了采用精馏型油分离器的方案.使用Aspen软件对进口温度62℃、质量比9:1的R134a 与 PAG混合物在精馏型油分离器中的分离进行仿真模拟.搭建了测试油分离器效率的实验装置,研究不同工况下精馏型油分离器的分离效率.结果表明,在顶端换热量一定的工况下,随着制冷剂质量流量的增大,分离效率呈现出先增大后降低的趋势;在制冷剂质量流量一定的工况下,随着顶端换热量增大,分离效率增大.对比实验结果与仿真结果,两者具有一致性.当制冷剂质量流量为 9.19g/s,顶端换热量为 200W时,分离效率高达 99.928%.相比于传统的油分离器,精馏型油分离器的油分离效率显著提升.
Abstract
Aiming at the problem that the oil separation coefficient of oil separator is insufficient,in order to ensure the stable operation of auto cascade refrigeration system,a distillation-type oil separator was proposed according to the separation principle of traditional oil separator and distillation principle.Software Aspen was used to simulate the separation of R134a and PAG mixture in the distillation-type oil separator with an inlet temperature of 62℃and mass ratio of 9:1.An experimental device was established to test the efficiency of the distillation-type oil separator under different working conditions.The results show that the separation efficiency increases first and then decreases with the increase of mass flow rate of refrigerant under constant top heat transfer.When the mass flow rate of refrigerant is constant,the separation efficiency increases with the increase of heat transfer at the top.The experimental results are consistent with the simulation results.When the mass flow of refrigerant is 9.19g/?s and top heat transfer is 200W,the separation efficiency is up to 99.928%.Compared with traditional oil separator,the oil separation efficiency of distillation-type oil separator is significantly improved.
国家科技期刊平台
NSTL
维普
万方数据