摘要
基于太阳能集热/蒸发器和冷凝器的分布参数均相流动模型、压缩机和电子膨胀阀的集总参数模型和系统制冷剂充注量模型,编制了以R410A为工质的直膨式太阳能热泵热水器系统性能模拟程序.在集热器出口过热度维持不变的条件下,计算了不同充注量下系统热性能参数,分析了充注量变化对系统热性能的影响特性.结果表明:随着制冷剂充注量的不断增加,蒸发压力和加热时间逐渐减小,压缩机瞬时功率和集热器集热效率逐渐增大;而且,制冷剂充注量的变化对冷凝压力和系统性能系数(COP)的影响很小.
Based on the distributed parameter and homogeneous flow models of solar collector/evaporator and condenser, the lumped parameter models of compressor and electronic expansion valve and the refrig erant charge model, a simulation program of a direct expansion solar assisted heat pump water heater （DX- SAHPWH） system using R410A was coded. For a fixed superheat degree at the collector outlet, the thermal performance parameters of the DX-SAHPWH system were obtained under different refrigerant charge conditions, and the effects of changing the refrigerant charge on the thermal performance of the system were analyzed. The results show that as the refrigerant charge increases, the evaporating pressure and heating time of the system decrease, but the instantaneous power of the compressor and the thermal efficiency of the collector increase. What＇s more, the influences of the refrigerant charge on the condensing pressure and coefficient of performance （COP） of the system are very small.
出处
《上海交通大学学报》
EI
CAS
CSCD
北大核心
2013年第3期370-375,共6页
Journal of Shanghai Jiaotong University
基金
山东省高等学校科技计划资助项目(J11LD63)
山东省泰山学者建设工程专项经费资助项目
关键词
太阳能热泵
直膨式
制冷剂充注量
性能模拟
solar assisted heat pump
direct expansion
refrigerant charge
performance simulation
