Experimental performance evaluation of a novel heat pump water heater assisted with shower drain water

Jiankai Dong, Zhuo Zhang, Yang Yao, Yiqiang Jiang and Bo Lei

Applied Energy, 2015, vol. 154, issue C, 842-850

Abstract: 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 CO2 emissions significantly.

Keywords: Heat pump water heater; Shower drain water; Water pre-heated loops; Experimental performance (search for similar items in EconPapers)
Date: 2015
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (17)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0306261915006546
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:appene:v:154:y:2015:i:c:p:842-850

Ordering information: This journal article can be ordered from
http://www.elsevier.com/wps/find/journaldescription.cws_home/405891/bibliographic
http://www.elsevier. ... 405891/bibliographic

DOI: 10.1016/j.apenergy.2015.05.044

Access Statistics for this article

Applied Energy is currently edited by J. Yan

More articles in Applied Energy from Elsevier
Bibliographic data for series maintained by Catherine Liu ().