Experimental performance evaluation of a novel heat pump water heater assisted with shower drain water
Experimental performance evaluation of a novel heat pump water heater assisted with shower drain water
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DOI：
10.1016/j.apenergy.2015.05.044
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发表时间：
2015-09
期刊：
影响因子：
11.2
通讯作者：
Jiankai Dong;Zhuo Zhang;Yang Yao;Yiqiang Jiang;B. Lei
中科院分区：
文献类型：
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作者：
Jiankai Dong;Zhuo Zhang;Yang Yao;Yiqiang Jiang;B. Lei
由于淋浴排水温度较高，排放时会浪费大量热量。因此，从固体废弃物中回收这些未利用的热量，在提高建筑能效方面显示出巨大的潜力。本文提出了一种新型的单机辅助热泵热水器，可以有效地回收家用单机热水器中的能量。为提高淋浴余热回收装置的性能，设计了一种带水预热回路的淋浴余热回收装置。首先建立了系统的原型，然后对系统在不同条件下的性能进行了实验和讨论。实验结果表明，与传统电热水器相比，该新型热泵热水器可节能约70%。此外，采用水预热回路可以显著提高系统的COP。从而验证了这种新型热泵热水器的实施能够显著降低能耗和二氧化碳排放。
Since the temperature of shower drain water (SDW) is relatively high, lots of heat is wasted with the discharge of SDW. Therefore, the recovery of this unutilized heat from SDW shows great potential in improving the building energy efficiency. In this paper, a novel heat pump water heater assisted with SDW for small single family was proposed, which could effectively recover the energy in domestic SDW. To improve its performance, a shower waste heat extraction device (WHED) with water pre-heated loops was designed. A prototype of the system was firstly set up, and then the system performances under different conditions were experimented and discussed. The experimental results showed that approximately 70% of energy could be saved using this novel heat pump water heater, compared with the traditional electric water heater. Furthermore, the COP of the system could be improved observably when using water pre-heated loops. Thus the implementation of this novel heat pump water heater was verified to be capable of reducing energy usage and CO2emissions significantly.