摘要
提出并构建了一种直接膨胀式太阳能与空气复合源热泵热水系统。在南京夏季的晴天、阴天及冬季晴天工况下分别对实验样机的运行特性进行研究。实验结果表明:该系统在不同天气下以不同热源模式高效地将热水加热到55℃。在夏季晴天太阳辐射波动较大时,系统的集热/蒸发器可以同时吸收太阳辐射能和空气热量,以太阳能为主,空气源为辅,平均能效比为4.83;在夏季阴天,系统以空气源热泵模式稳定运行,平均能效比为3.97;在冬季晴天,系统以太阳能热泵模式运行,太阳能的输入提高了热泵蒸发温度,从而缓解了蒸发器结霜问题。
A direct-expansion type solar-air source heat pump water heating system was developed. An experimental prototype was investigated under different weather conditions in summer and winter in Nanjing, China. Experimental results showed that the prototype could heat water up to 55℃ efficiently by using different heat sources. When there was a large fluctuation of solar radiation on a sunny day, the collector/evaporator absorbed heat from both solar radiation and air, the prototype operated steadily in the solar-air dual source mode, with a high averaged energy efficiency ratio （EER） of 4.83. Meanwhile, it operated in the air-source mode with an averaged EER of 3.97 in a rainy day. Also, on a cold sunny day in winter, it operated in the solar-source mode with a relatively higher evaporation temperature compared with air-source heat pump, thus avoiding defrosting for the evaporator.
出处
《化工学报》
EI
CAS
CSCD
北大核心
2010年第2期484-490,共7页
CIESC Journal
基金
国家高技术研究发展计划项目(2007AA05Z434)
国家科技支撑重点资助项目(2008BAJ12B02)~~
关键词
热泵热水器
太阳能与空气复合源热泵
集热/蒸发器
运行特性
能效比
heat pump water heater
solar-air source heat pump
collector/evaporator
operatingcharacteristics
energy efficiency ratio
