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http://dx.doi.org/10.17664/ksgee.2014.10.3.001

The Effect of Load Variation on the Performance of an Injection Heat Pump with an Economizer  

Choi, Jong Min (Department of Mechanical Engineering, Hanbant National University)
Park, Yong-Jung (R&D Center, Daihan Climate Co. Ltd.)
Kang, Shin-Hyung (Department of Mechanical Engineering, Konyang University)
Publication Information
Journal of the Korean Society for Geothermal and Hydrothermal Energy / v.10, no.3, 2014 , pp. 1-7 More about this Journal
Abstract
Heat pumps have received a fair amount of attention all over the world for their high efficiency and low environmental impact. Employing heat pumps for residential heating and cooling produces only about 2038 kg-$CO_2$/year, an amount which is less than half that of conventional boiler systems. However, the use of single-stage heat pumps becomes uneconomical when they are operated at very low evaporating temperature or high condensing temperature. Two-stage heat pumps systems can be used successfully for low or high temperature applications. In this paper, the experimental study on the performance of two-stage heat pump with an economizer was executed in heating mode. When the secondary fluid inlet temperature to the indoor heat exchanger increased, the COP enhancement rate of two-stage heat pump with an economizer was increased. For all outdoor inlet temperature conditions, the performance of the heat pump with an economizer was higher than it without an economizer.
Keywords
Economizer; COP; Heat pump; Load;
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Times Cited By KSCI : 2  (Citation Analysis)
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