Abstract
Solar-assisted air source heat pump (SAASHP) has greatly improved the operating efficiency of the system. However, the operational performance of the key modules in the combined system is not clear. So a solar-assisted air source heat pump radiant heating system was established and a SAASHP was monitored. The key parameters of the solar collector outlet water inlet water temperature, and water tank temperature under different combined operation modes were calculated. The solar collector heat collection efficiency, system COP, and the energy consumption ratio under the corresponding mode were given. The solar collector heat collection efficiency, system COP, and the energy consumption ratio under the corresponding mode were given. Photo thermal conversion, evaporative heat transfer, and energy conversion between the condensers. By comparing the operating characteristics of each combination mode, the characteristics of SAASHP combined operation are finally obtained.
Highlights
As the issue of energy and environmental protection becomes more prominent, the negative effects brought about by the use of non-renewable energy based on heating models are increasingly unable to meet the requirements of sustainable development in society [1,2]
Published under licence by IOP Publishing Ltd cycle model with the zeotropic mixture of R32/R290 and the results showed that it has 4.23-9.85% and 4.37-9.68 improvement compared to the Air source heat pumps (ASHP)
For Mode 3, solar energy auxiliary and air source heat pump require the work of the compressor to make heat, and the air source heat pump is less efficient at night causing less heat
Summary
As the issue of energy and environmental protection becomes more prominent, the negative effects brought about by the use of non-renewable energy based on heating models are increasingly unable to meet the requirements of sustainable development in society [1,2]. When the temperature in winter is lower than the air dew point temperature and lower than 0°C, frost issues may occur on the outdoor heat exchanger coil surfaces [3,4,5,6]. To solve this problem many experts conducted research, and SAASHP greatly improved the system's operating efficiency [7,8,9]. M. Shan [9] et al researched an integrated active solar and ASHP water heating system with a passive house in cold climate. By comparing the special operations of each combination mode, the characteristics of the combined operation of the SAASHP are obtained
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