PERFORMANCE OPTIMIZATION AND PARAMETER DESIGN of AN IRREVERSIBLE SOLAR-DRIVEN HEAT PUMP SYSTEM

考虑集热器辐射对流热损等多种不可逆因素,建立不可逆三热源太阳能热泵系统新模型,基于热力学分析方法,导出系统总性能系数与集热器工作温度关系的解析表达式,揭示了集热器的辐射对流热损、有限速率热传导和工质内部不可逆性等对系统性能特性的影响,分析和讨论了在最大总性能系数下太阳能热泵系统的优化设计参量。A new irreversible solar-driven three-heat-source pump system was presented,in which multi-irreversibilities including the radiation and convection heat losses of the collector were taken into account.Based on thermodynamic analysis method,the analytical expression between the overall coefficient of performance of the system and the operating temperature of the solar collector was derived.The effects of radiation and convection heat losses of the collector,finite-rate heat transfer and internal irreversibility inside the working fluid on the performance characteristics of the system were revealed.Furthermore,the optimal design parameters of the system at the maximum overall coefficient of performance were analyzed and discussed.国家自然科学基金(51176160);教育部高校博士点基金(20090121110026);中央高校基本科研业务费专项基金(201112G006