冷水相变能热泵系统的性能系数与经济性分析  

Performance Coefficient and Economic Analysis of Cold-water Phase Change Energy Heat Pump System

作　　者：杨玉娟 吴荣华[1] 岳远博 YANG Yu-juan;WU Rong-hua;YUE Yuan-bo(College of Mechanical and Electrical Engineering,Qingdao University,Qingdao,China,Post Code:266000;Qingdao Kechuang Blue New Energy Co.,Ltd.,Qingdao,China,Post Code:266000)

机构地区：[1]青岛大学机电工程学院,山东青岛266000 [2]青岛科创蓝新能源股份有限公司,山东青岛266000

出　　处：《热能动力工程》2023年第3期150-157,共8页Journal of Engineering for Thermal Energy and Power

摘　　要：冷水相变能热泵系统是一种清洁能源供热供冷系统,性能系数和经济性是冷水相变能热泵系统的主要问题。根据冷水相变能热泵系统的运行原理,采用控制变量法实验分析了冰层厚度、冷水流量以及蒸发冷凝温度对系统能效比的影响,提出了一种冷水相变能热泵系统的运行调控方案并计算其经济性。研究表明:结冰厚度为8 mm时,系统有效能效比最大;系统制热量为744 kW时,相变机结冰期冷水流量应控制在70 t/h,排冰期冷水流量应控制在80 t/h;根据不同时间段的冷热负荷进行系统运行调控,与传统运行方式相比,冬季运行成本降低了4.72%,夏季运行成本降低了29.96%,系统能效比提高了5.6%;系统投资回报率为15.27%,投资回收期为7.67年,具有良好的经济性与节能性。Cold-water phase change energy heat pump system is a clean energy heating and cooling system,and coefficient of performance and economy are the main problems of cold-water phase change energy heat pump systems.According to the operation principle of the cold-water phase change energy heat pump system,the influence of ice thickness,cold-water flow rate and evaporation condensation temperature on the energy efficiency ratio(EER) of the system is analyzed by the control variable method.The operation and regulation scheme of the cold-water phase change energy heat pump system is proposed,and its economy is calculated.The results show that the effective EER of the system is maximum when the ice thickness is 8 mm.When the system heat production is 744 kW,the cold-water flow rate of phase change machine should be controlled at 70 t/h in the freezing period and 80 t/h in the deicing period.According to the cooling and heating loads in different time periods,the system operation and regulation are carried out,the operation cost is reduced by 4.72% in winter and 29.96% in summer,and the system energy efficiency ratio is increased by 5.6%compared to traditional ways of running.The return rate of systematic investment is 15.27%,and the payback period is 7.67 years,showing good economy and energy saving.

关 键 词：冷水相变能 热泵系统 冷水相变机 冰层厚度 冷水流量 

分 类 号：TU831.6[建筑科学—供热、供燃气、通风及空调工程]