R134a-DMF吸收-压缩复合式制冷系统仿真分析  

Simulation Analysis of R134a-DMF Absorption-Compression Hybrid Refrigeration System

作　　者：魏浩展 李慧[1] 王万钰 WEI Haozhan;LI Hui;WANG Wanyu

机构地区：[1]山东建筑大学热能工程学院,山东济南250101

出　　处：《煤气与热力》2023年第2期25-31,共7页Gas & Heat

基　　金：山东省重大科技创新工程项目“太阳能-电能混合驱动吸收压缩式热泵机组及关键技术研究”(2019JZZY020812)。

摘　　要：为解决R134a-DMF吸收式制冷系统吸收器出口出现制冷剂(R134a)气体问题,提出R134a-DMF吸收-压缩复合式制冷系统,利用压缩机回收制冷剂气体。基于Aspen Plus软件,选取PENG-ROB物性方法,搭建复合式制冷仿真系统。将蒸发器负荷、热驱动性能系数、节电率作为复合式制冷系统性能评价指标。保持其他设定参数不变:在不同冷凝温度下,分析发生温度对系统性能评价指标的影响;在不同R134a质量分数(吸收器出口气液混合物中)下,分析吸收温度对系统性能评价指标的影响。当冷凝温度不变时,随着发生温度升高,蒸发器负荷、节电率增大,热驱动性能系数减小。当发生温度不变时,随着冷凝温度降低,蒸发器负荷、热驱动性能系数、节电率均增大。当R134a质量分数不变时,随着吸收温度升高,蒸发器负荷增大,热驱动性能系数、节电率减小。当吸收温度不变时,随着R134a质量分数增大,蒸发器负荷增大,热驱动性能系数、节电率减小。In order to solve the problem of refrigerant(R134a) gas at the absorber outlet of R134a-DMF absorption refrigeration system, a R134a-DMF absorption-compression hybrid refrigeration system is proposed to recover the refrigerant gas by using the compressor. Based on Aspen Plus software, the PENG-ROB physical property method is selected to build a hybrid refrigeration simulation system. The evaporator load, thermal driving performance coefficient and power saving rate are taken as the performance evaluation indexes of the hybrid refrigeration system. Other set parameters keep unchanged: The impact of generation temperature on system performance evaluation indexes is analyze under different condensing temperatures;The impact of absorption temperature on system performance evaluation indexes is analyzed under different R134a mass fractions(in the gas-liquid mixture at absorber outlet). When the condensing temperature is constant, as the generation temperature increases, the evaporator load and power saving rate increase, and the thermal driving performance coefficient decreases. When the generation temperature is constant, as the condensing temperature decreases, the evaporator load, thermal drive performance coefficient and power saving rate increase. When the mass fraction of R134a is constant, as the absorption temperature increases, the evaporator load increases, and the thermal driving performance coefficient and power saving rate both decrease. When the absorption temperature is constant, as the mass fraction of R134a increases, the evaporator load increases, and the thermal driving performance coefficient and power saving rate decrease.

关 键 词：R134a-DMF工质对 吸收式制冷 复合式制冷 压缩式制冷 

分 类 号：TU831.6[建筑科学—供热、供燃气、通风及空调工程]