摘要
选择R717、R290、R600a、R134a和R1234yf五种沸点相近的制冷工质,基于MATLAB软件,引入制冷剂物性参数的Cleland拟合模型,编写了喷射制冷系统的仿真模型,比较了五种制冷剂在不同冷冻水进口温度及不同冷却水进口温度下,喷射系数u和COP值的变化趋势。结果显示:冷冻水进口温度的改变,使制冷剂的制冷性能随之升高而增大;且制冷剂制冷性能随冷却水进口温度的升高而减小。R717在五种制冷剂中,喷射器喷射系数和系统性能COP都是最大的,R1234yf和R134a则具有相近的喷射系数。
Based on the MATLAB software,the Cleland fitting model of the physical parameters of the refrigerant was introduced,and the simulation model of the jet refrigeration system was prepared.Five kinds of refrigerants were compared with those of the refrigerant.Different chilled water inlet temperature and different cooling water inlet temperature,the injection coefficient u and COP value of the trend.The results show that the change of the inlet temperature of the chilled water increases with the increase of the refrigeration performance of the refrigerant,and the refrigeration performance of the refrigerant decreases with the increase of the inlet temperature of the cooling water.R717 In the five refrigerants,the injector injection coefficient and system performance COP are the largest,R1234 yf and R134 a have a similar ejection coefficient.
作者
于文艳
郭振华
王海博
YU Wen - yan GUO Zhen - hua WANG Hai - bo(College of Civil Engineering, Inner Mongolia University of Technology ,Hohhot 010051, China)
出处
《应用能源技术》
2017年第9期35-39,共5页
Applied Energy Technology
基金
内蒙古工业大学科学研究项目(X201612)
关键词
制冷剂
喷射制冷系统
COP
Refrigerants
Ejector refrigeration system
COP
