Experimental and theoretical study on an air-source heat pump water heater for northern China in cold winter: Effects of environment temperature and switch of operating modes
Experimental and theoretical study on an air-source heat pump water heater for northern China in cold winter: Effects of environment temperature and switch of operating modes
复制标题
北方寒冷冬季空气源热泵热水器实验与理论研究：环境温度及运行模式切换的影响
DOI：
10.1016/j.enbuild.2019.03.028
复制
发表时间：
2019-05
影响因子：
6.7
通讯作者：
Xu Xiaoxiao
中科院分区：
文献类型：
--
作者：
Xu Yingjie;Huang Yuangong;Jiang Ning;Song Mengjie;Xie Xiaodong;Xu Xiaoxiao
出于保护环境和节约能源的迫切需要，中国政府在中国北部提出了“煤改电”的政策，将空气源热泵用于采暖。因此，本文研究了一种工作温度为−20℃、热水温度为75℃的复叠式热泵，以匹配中国北部寒冷气候条件下的原有铸铁散热器，这是一种鲜有报道的热泵。它还可以为工业和商业提供热水，并在夏季以单级模式工作。设计并搭建了复叠式热泵的实验样机。实验结果表明，在环境温度低至−21℃时，复叠式热泵系统的COP可保持在1.69，大部分被测工况的COP都在2左右。在试验温度范围内，供热能力为11.32~18.93 kW，排烟温度为93.95~91.42℃，表明该复叠式热泵具有良好的节能潜力，运行稳定，为煤改电改造中的空间供暖提供高温水源是可行的。为了研究叶栅模式和单级模式之间的转换，建立了热泵的计算模型，并用实验数据进行了验证。结果表明，当环境温度高于20℃时，考虑到COP、供热能力和排放温度，级联模式应该切换到单级模式。所研究的系统和结果也可用于世界其他寒冷天气，以帮助节约能源。
Because of the urgent need of environment protection and energy saving, Chinese government has proposed ‘coal-to-electricity’ policy in north China to use air-source heat pump for space heating. Therefore, a cascade heat pump working at −20°C and providing 75°C hot water is studied in this work to match original cast iron radiator in cold climate in north China, which was seldom reported. It is also able to provide hot water for industrial and commercial use and work under single-stage mode in summertime. An experimental prototype of the cascade heat pump is designed and set up. Experimental results show COP of the cascade heat pump system can remain 1.69 at environment temperature as low as −21°C and the COP is around 2 for most of the tested cases. In the tested temperature range, heating capacity varies from 11.32 to 18.93 kW, and discharge temperature varies from 93.95 to 91.42°C. Thus, the cascade heat pump reveals good energy saving potential and can work stably demonstrating the feasibility to supply high-temperature water for space heating in coal-to-electricity retrofit. To study the switch between cascade and single-stage modes, computational models of the heat pump are established, validated with experimental data. The results imply cascade mode should be switched to single-stage mode when ambient temperature is higher than 20 °C, taking into account the COP, heating capacity, and discharge temperature. The studied system and results can be also used in other cold weather worldwide to help save energy.
登录
查看更多内容
影响因子：
6.4
作者：
Yulong Song;Dongzhe Li;F. Cao;Xiaolin Wang
通讯作者：
Yulong Song;Dongzhe Li;F. Cao;Xiaolin Wang
影响因子：
6.7
作者：
Rongjiang Ma;Chunliu Mao;M. Shan;Liao Zhang;Xudong Yang
通讯作者：
Rongjiang Ma;Chunliu Mao;M. Shan;Liao Zhang;Xudong Yang
影响因子：
6.7
作者：
Yaning Zhang;Q. Ma;Bingxi Li;Xinmeng Fan;Zhongbin Fu
通讯作者：
Yaning Zhang;Q. Ma;Bingxi Li;Xinmeng Fan;Zhongbin Fu
影响因子：
11.2
作者：
Qun-li Zhang;Lin Zhang;Jinzhe Nie;Yinlong Li
通讯作者：
Qun-li Zhang;Lin Zhang;Jinzhe Nie;Yinlong Li
带省煤器的热动力新型压缩强化喷射制冷循环性能评价及节能潜力比较
影响因子：
6.4
作者：
Xu Yingjie;Jiang Ning;Han Xiaohong;Han Wenqiao;Mao Ning;Chen Guangming
通讯作者：
Chen Guangming