Experimental study of operating characteristics of compression/absorption high-temperature hybrid heat pump using waste heat

• Published in: Renewable energy Vol. 54; pp. 13 - 19
• Main Authors: Kim, Jiyoung, Park, Seong-Ryong, Baik, Young-Jin, Chang, Ki-Chang, Ra, Ho-Sang, Kim, Minsung, Kim, Yongchan
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Oxford Elsevier Ltd 01.06.2013; Elsevier
• Subjects: Absorber; absorption; ammonia; Applied sciences; Composition effects; Compressing; Compression/absorption hybrid heat pump; compressors; Desorber; Devices using thermal energy; Energy; Energy. Thermal use of fuels; Exact sciences and technology; Glide; heat; heat exchangers; Heat pumps; Hybrid heat pump; Hybrid systems; Liquids; Natural energy; NH3/H2O mixture; Pumps; renewable energy sources; temperature; vapors; Waste heat; water; NH3/H2O mixture; Hybrid heat pump; Compression/absorption hybrid heat pump; Desorber; Absorber; Renewable energy; Heat pump; O mixture; H; NH; High temperature
• ISSN: 0960-1481; 1879-0682
• DOI: 10.1016/j.renene.2012.09.032

This research describes the development of a compression/absorption hybrid heat pump system that utilizes a mixture of NH3 and H2O as a working fluid. The heat pump cycle is based on a hybrid combination of vapor compression cycle and absorption cycle. The system consists of major components of two-stage compressors, absorbers, and a desorber. There are also auxiliary parts like a desuperheater, solution heat exchangers, a solution pump, a rectifier, and a liquid/vapor separator to support stable operation of the heat pump. This compression/absorption hybrid heat pump provides many advantages of performance over conventional vapor compression heat pumps including a large temperature glide, an improved temperature lift, a flexible operating range, and greater capacity control. These benefits are optimized by changing the composition of the mixture. In this study, the effect of the composition on the operating characteristics of the compression/absorption hybrid heat pump was experimentally observed.