Experimental Research of a Water-Source Heat Pump Water Heater System

Zhongchao Zhao, Yanrui Zhang, Haojun Mi, Yimeng Zhou and Yong Zhang
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Zhongchao Zhao: School of Energy and Power, Jiangsu University of Science and Technology, Zhenjiang, 212000, China
Yanrui Zhang: School of Energy and Power, Jiangsu University of Science and Technology, Zhenjiang, 212000, China
Haojun Mi: School of Energy and Power, Jiangsu University of Science and Technology, Zhenjiang, 212000, China
Yimeng Zhou: School of Energy and Power, Jiangsu University of Science and Technology, Zhenjiang, 212000, China
Yong Zhang: School of Energy and Power, Jiangsu University of Science and Technology, Zhenjiang, 212000, China

Energies, 2018, vol. 11, issue 5, 1-13

Abstract: The heat pump water heater (HPWH), as a portion of the eco-friendly technologies using renewable energy, has been applied for years in developed countries. Air-source heat pump water heaters and solar-assisted heat pump water heaters have been widely applied and have become more and more popular because of their comparatively higher energy efficiency and environmental protection. Besides use of the above resources, the heat pump water heater system can also adequately utilize an available water source. In order to study the thermal performance of the water-source heat pump water heater (WSHPWH) system, an experimental prototype using the cyclic heating mode was established. The heating performance of the water-source heat pump water heater system, which was affected by the difference between evaporator water fluxes, was investigated. The water temperature unfavorably exceeded 55 °C when the experimental prototype was used for heating; otherwise, the compressor discharge pressure was close to the maximum discharge temperature, which resulted in system instability. The evaporator water flux allowed this system to function satisfactorily. It is necessary to reduce the exergy loss of the condenser to improve the energy utilization of the system.

Keywords: water-source heat pump water heater; cyclic heating; evaporator water flux; exergy analysis (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2018
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (10)

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