Performance simulation of combined heat pump with unglazed transpired solar collector. (1st March 2019)

• Record Type: Journal Article
• Authors: Safijahanshahi, Esmaeel; Salmanzadeh, Mazyar
• Is Part Of: Solar energy. Volume 180(2019)
• Page Start: 575
• Page End: 593
• Publication Date: 2019-03-01
• Subjects: Solar assisted heat pump -- Unglazed transpired solar collector -- Air-to-air heat pump -- First principle method; Solar energy -- Periodicals; Solar engines -- Periodicals; 621.47
• DOI: 10.1016/j.solener.2019.01.038
• Languages: English
• ISSNs: 0038-092X

Abstract

Highlights: Presentation of SAHP concept by the combination of UTSC and air-to-air HP. Development of UTSC and HP mathematical models based on first principle method. Reduction in electricity consumption and Co2 emissions of the HP up to 10%. Abstract: Ambient air temperature reduction in winter season reduces Coefficient of Performance (COP) of heat pumps. By using of solar thermal energy to increase the evaporator fluid temperature, compressor work decreases and thus the COP of heat pump increases. In this study, the concept of solar assisted heat pump was presented by combination of an unglazed transpired solar collector and an air-to-air heat pump. In this configuration, inlet air of evaporator was preheated by unglazed transpired solar collector. A mathematical model based on first principle method was developed and performance of this system was investigated over a cold season of Kerman city (located in Kerman province in the south of Iran). Results showed that for a 2.5 kW heat pump a 2.5 m 2 collector was required and this collector could decrease the electricity consumption and C o 2 generation of the conventional air-to-air heat pump up to 10%. It was also concluded that, if the collector heats the ambient air less than 0.3 °C then the COP of solar assisted heat pump would be less than COP of heat pump.