A field study of a wastewater source heat pump for domestic hot water heating
A field study of a wastewater source heat pump for domestic hot water heating
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DOI：
10.1177/0143624412463571
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发表时间：
2013-11
影响因子：
1.7
通讯作者：
Shen Chao;J. Yiqiang;Yao Yang;D. Shiming;Wang Xinlei
中科院分区：
文献类型：
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作者：
Shen Chao;J. Yiqiang;Yao Yang;D. Shiming;Wang Xinlei
以某SPA中心公共浴室排放的污水为热源，建立了热泵实验装置。本文介绍了污水源热泵的现场实测运行性能。包括基于在各种操作条件下收集的现场数据的分析。结果表明，污水温度对蒸发温度和污水源热泵的性能系数有很大的影响。污水从储水槽底部向顶部循环，可以减弱储水槽内垂直方向的污水温度分布，提高污水源热泵的性能系数和压缩机吸入压力。对污水源热泵的日平均性能系数进行了为期一个多月的监测。结果表明，所测得的性能系数逐渐降低，这表明需要定期清洗的换热器中使用的污水源热泵系统。此外，由于生物结垢的积累，废水管道的记录最大输送能力在1个月的运行中减少了16.9%，在20.5个月后减少了20.1%。最后，分析比较的经济运行的污水源热泵系统与传统的水加热系统。实际应用：利用热泵回收废水中的热量，对节能环保具有重要意义。以城市污水或处理后的污水为热源的污水源热泵已经开展了大量的研究和工程。然而，现场测量结果的热泵，回收废洗澡水的热量，以前没有报道。由于洗浴废水水质与生活污水水质在温度、水量、洁净度等方面存在差异，以往城市污水源热泵的设计和运行经验不能完全作为洗浴废水源热泵设计的参考。本文介绍了利用洗浴废水作为热源进行热水供暖的热泵系统的设计和运行的现场实验工作，其结果可为今后洗浴废水源热泵系统的设计和运行提供重要的参考。
An experimental heat pump utilizing wastewater discharged from the common bathroom in a SPA center as a heat source was built. In this article, the field measured operating performance of the wastewater source heat pump is reported. An analysis based on the collected field data under various operating conditions is included. It was shown that the temperature of wastewater greatly affected the evaporating temperature and the coefficient of performance of the wastewater source heat pump. Circulating wastewater from the bottom to the top of the wastewater storage tank could weaken even out the vertical wastewater temperature distribution inside the wastewater storage tank and improve the coefficient of performance and compressor suction pressure of the wastewater source heat pump accordingly. The daily averaged coefficient of performance of the wastewater source heat pump was monitored for over an entire month. It was shown that the measured coefficient of performance gradually reduced, suggesting the need for regular cleaning of the heat exchangers used in a wastewater source heat pump system. In addition, the recorded maximum transporting capacity of the wastewater pipe reduced by 16.9% over the 1 month operation and by 20.1% after ∼5 months due to the bio-fouling build-up. Finally, an analysis comparing the economics of operating a wastewater source heat pump system with that of operating conventional water heating systems is presented. Practical application: The use of heat pump to recover heat from wastewater is significant to energy conservation and environmental protection. A number of researches and projects on wastewater source heat pumps using urban sewage or treated sewage as a heat source have been carried out. However, field measured results on a heat pump, which recovered heat from waste bath water, was not previously reported. As the quality of waste bath water was different from that of sewage in terms of temperature, amount, and the degree of cleanliness, the experiences on designing and operating urban sewage source heat pumps previously obtained could not be used as a full reference for designing a waste bath water source heat pump. In this article, field experiment work of designing and operating a heat pump which used waste bath water as a heat source for hot water heating is presented, and the results can be used as a key reference for designing and operating waste bath water source heat pump systems in the future.