Simulation and analysis of hot water system with comprehensive utilization of solar energy and wastewater heat

Dongwei Zhang, Zhao Gao, Chenglei Fang, Chao Shen, Hang Li and Xiang Qin

Energy, 2022, vol. 253, issue C

Abstract: With global interest in energy saving and emission reduction, the combination of waste water energy recycling and solar energy has attracted great attention. In this work, a solar-assisted waste water source heat pump hot water system was built in TRNSYS. The sensitivity analysis of different factors on the annual heating performance coefficient of the system was conducted and the optimal parameters were selected to improve the basic scheme. The results revealed that the COPsys and COPHP were highly related to the pump flowrate and the storage capacity of heat exchange tank, but the azimuth and inclination angle of solar collector have slight influence on them. Moreover, the increase of heating capacity of solar collector will lead to the decrease of COPHP, while resulting in the decrease of the heat pump power consumption. The suitable pump flowrate is 4.6 m3/h and the appropriate volume of the heat exchange tank is 1 m3. The best azimuth angle and inclination angle of the solar collector are 4° south by east and 42°, respectively. The improved system has more stable hot water temperature in winter with significant decrease of the energy consumption.

Keywords: Solar energy; Wastewater heat recovery; Heat pump; COP (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0360544222010842
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:energy:v:253:y:2022:i:c:s0360544222010842

DOI: 10.1016/j.energy.2022.124181

Access Statistics for this article

Energy is currently edited by Henrik Lund and Mark J. Kaiser

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