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http://dx.doi.org/10.17664/ksgee.2013.9.2.001

Study on the Performance of a Variable Speed Cascade Heat Pump under Various Operating Conditions  

Jeong, Kwangmoo (Graduate School of Mechanical Engineering, Hanbat National University)
Choi, Jong Min (Department of Mechanical Engineering, Hanbat National University)
Publication Information
Journal of the Korean Society for Geothermal and Hydrothermal Energy / v.9, no.2, 2013 , pp. 1-7 More about this Journal
Abstract
Most researches done on heat pumps have been on heat pumps for refrigeration, cooling and heating. There is therefore the need for more research on hot water heat pumps, especially for high temperature. Even though the cascade heat pump cycle has a great potential more efficient hot water generation even at low evaporating temperatures, it has been researched least for this purpose. In this study, the heating performance of a variable speed cascade heat pump was investigated by varying operating conditions. For the same heating capacity values, it was found that increasing the low stage compressor speed was more suitable for enhancing the performance of the system to get a higher temperature.
Keywords
Heat pump; Cascade cycle; Heating; Cascade heat exchanger;
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