摘要
本文提出了一种多机组并联的热泵干燥系统,并使用Aspenplus软件,在新风风量一定时,对室外环境温度不同的4个工况下热泵机组的运行过程进行了模拟,分析了热泵干燥系统中5台热泵机组的制冷剂和空气参数的变化,并对热泵机组部件进行了?分析。结果表明,多机组并联热泵干燥系统随着室外空气干球温度的升高,#1～#5热泵机组压缩机耗功增加,?损失增加,节流阀的不可逆?损失增加,#1～#3热泵机组蒸发器传热?损失增加,冷凝器传热?损失降低,#1热泵机组的冷凝器传热?损失最小。#4、#5热泵机组的蒸发器传热?损失分别在20℃和25℃时达到最低值。
A multi-unit parallel heat pump drying system was proposed, and the Aspen plus software was used to simulate the operation process of the heat pump unit under four working conditions with different outdoor air temperatures when the fresh air volume was constant. The changes of refrigerant and air parameters of five heat pump units in the heat pump drying system were analyzed, then the exergy of the heat pump unit components were analyzed. The results show that the multi-unit parallel heat pump drying system increases the temperature of the outdoor air dry bulb, the power consumption of #1~#5 heat pump unit increases, the exergy loss increases, and the irreversible loss of the throttle valve increases. Heat exchanger exergy loss of #1~# 3 heat pump unit evaporator increases, heat transfer exergy loss of condenser is reduced, and heat transfer exergy loss of #1 heat pump unit condenser is minimal. The heat transfer exergy loss of #4 and #5 heat pump unit reached the lowest value at 20 ℃ and 25 ℃, respectively.
作者
李学瑞
王德昌
LI Xuerui;WANG Dechang(Institute of Energy Engineering,Qingdao University,Shandong,Qingdao,Shandong 266071,China)
出处
《制冷技术》
2018年第6期61-67,共7页
Chinese Journal of Refrigeration Technology
