Experimental research on solar phase change heat storage evaporative heat pump system. (1st February 2021)

• Record Type: Journal Article
• Authors: Zhu, Chuanhui; Li, Baoguo; Yan, Shubin; Luo, Quanquan; Li, Chao
• Is Part Of: Energy conversion and management. Volume 229(2021)
• Publication Date: 2021-02-01
• Subjects: Solar energy -- Heat pump -- Phase change heat storage -- Heating -- TRNSYS simulation; Direct energy conversion -- Periodicals; Energy storage -- Periodicals; Energy transfer -- Periodicals; Énergie -- Conversion directe -- Périodiques; Direct energy conversion; Periodicals; 621.3105
• DOI: 10.1016/j.enconman.2020.113683
• Languages: English
• ISSNs: 0196-8904

Abstract

Highlights: The experimental and simulation results of the temperature of the heating end equipment of the SPHP system and the system COP have good agreement. The heating power consumption of the SPHP system is approximately 72.8% of the single heat pump, the daily operating cost is only 41.2% of the single heat pump heating system, and the solar heating proportion is about 27.2%; the average COP is 3.79. The system does not need defrosting treatment. Abstract: With increase in global temperature, worsening of environmental conditions and a shortage of energy resources, countries around the world are actively developing the use of renewable energy sources. The technology of combining solar energy and heat pumps is an important direction for the development of new energy utilization technologies. In this paper, a solar phase change heat storage evaporative heat pump system (SPHP) is designed. The system uses a phase change heat storage tank as the connection center, and is coupled with a solar system and a heat pump system. The phase change heat storage tank is filled with ammonium aluminum sulfate dodecahydrate /stearic acid composite phase change heat storage material. The system was experimentally studied, and the analysis of a system simulation was performed using TRNSYS. The results show that the heating electricity consumption of the system is about 72.8% of that of a single heat pump, the daily operating cost is only 41.2% of that for a single heat pump heating system, the average system coefficient of performance (COP) reaches 3.79, the average heat collection efficiency of the solar collector can reach 59.8%, and the system solar energy proportion of heat supply is 27.2%. There was good agreement between the experimental and simulation results for the system COP and temperature of the heating end equipment.