R410A直膨式太阳能热泵热水器性能研究  

Performance of direct expansion solar assisted heat pump water heater using R410A

作　　者：孔祥强[1] 林琳[1] 李瑛[1] 杨前明[1] 

机构地区：[1]山东科技大学机械电子工程学院,山东青岛266590

出　　处：《浙江大学学报（工学版）》2013年第9期1666-1671,共6页Journal of Zhejiang University：Engineering Science

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

摘　　要：为了研究各种参数对以R410A为工质的直膨式太阳能热泵热水器系统的性能特性的影响,在建立太阳能集热/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,以及系统制冷剂充注量模型的基础上,编制了系统性能模拟程序,以电子膨胀阀进、出口焓值和制冷剂充注量为迭代判据进行求解.在太阳能集热/蒸发器出口过热度维持不变的条件下,模拟分析了环境参数、运行参数和结构参数对热水加热时间、集热器集热效率和系统性能系数(COP)的影响特性.模拟结果表明:太阳辐射强度和环境温度的升高可显著提高系统性能系数,并缩短热水加热时间;压缩机转速的提高使得系统性能系数降低,但可有效缩短热水加热时间;水箱容积的变化对系统性能系数影响很小;适度增加集热面积可提高系统性能系数.In order to study the influence of parameters on the operation characteristics of a direct expansion solar assisted heat pump water heater （DX-SAHPWH） system using R410A, 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 refrigerant charge model, a simulation pro- gram of the DX-SAHPWH system using R410A was coded, which was solved with the iterative calculation of the inlet and outlet enthalpy of electronic expansion valve and the refrigerant charge. For a fixed super- heat degree at the outlet of the collector/evaporator, the effects of various parameters, including environ- mental, operational and structural parameters, on heating time, collector efficiency and system coefficient of performance （COP） were simulated and analyzed. Simulation indicates that the system COP increases evidently and the heating time decreases with the increases of the solar radiation intensity and the ambient temperature. The increase of compressor speed con result in the decreases of the system COP and the heating time. However, the influence of water storage volume on the system COP is very small. The system COP would increase with the moderate increase of the collector area.

关 键 词：直膨式太阳能热泵 R410A 性能模拟 

分 类 号：TK519[动力工程及工程热物理—热能工程]