蓄能型太阳能热泵热水器性能系数的分析  

Coefficient of performance of solar heat pump water heater with energy storage

作　　者：吴薇[1] 卫梁彦[1] 程清[2] 王玲珑[1] 

机构地区：[1]南京师范大学能源与机械工程学院,江苏南京210042 [2]东南大学能源与环境学院,江苏南京210008

出　　处：《江苏大学学报（自然科学版）》2011年第6期667-671,共5页Journal of Jiangsu University：Natural Science Edition

基　　金：江苏省高校自然科学基础研究项目(07KJB480060);江苏省高校自然科学基础研究项目(09KJB470005)

摘　　要：针对太阳能热泵热水器受天气变化影响的问题,提出了一种新型的集热-蓄能-蒸发一体化太阳能热泵热水器,给出了系统的原理、特点、运行模式和集热-蓄能-蒸发器的结构形式.以癸酸为相变材料储存晴天的太阳辐射能,作为热泵在夜间和连续阴雨天时的低温热源制得热水,提高了热泵的制热效率,解决了太阳能间歇性所造成的系统运行不稳定的问题.进行了春季不同工况、不同工作模式的试验,分析了系统的性能系数COP,得出该系统的平均COP为7.56.太阳辐射强度均值为592 W.m-2的天气条件下,COP可达8.9;即使在夜间,COP仍能达到6.4,均高于相同天气条件下普通太阳能热泵热水器的COP,该系统的COP受天气变化影响较小.To solve the problem that solar heat pump water heater was prone to be affected by weather,a novel water heater integrated with collection,storage and evaporation was proposed.The principle,cha-racteristics,operating modes and structure of the collector-storage-evaporator system were investigated.Using phase change material of decanoic acid to store solar radiation in sunny days as low-temperature source,hot water was produced at night or in continuous rainy days.Thermal efficiency of heat pump system was increased significantly,and the operating unstableness of the heat pump system caused by interval solar energy was also solved.Experiments under different conditions and operating modes in spring were conducted,and the coefficient of performance（COP） of the system was analyzed.The results indicate that COP of this novel solar heat pump water heater with energy storage is higher than that of ordinary solar heat pump water heater at the same weather condition.The average COP of this system is 7.56 with maximum of 8.9 for average solar radiation of 592 W·m-2.COP can also reach 6.4 even at night,which means that weather has slight influence on COP.

关 键 词：太阳能热泵热水器 集热-蓄能-蒸发器 相变蓄能材料 性能系数 稳定性 

分 类 号：TU519[建筑科学—建筑技术科学]