AN EXPERIMENTAL STUDY ON PERFORMANCE IMPROVEMENT FOR AN AIR SOURCE HEAT PUMP BY ALTERNATE DEFROSTING OF OUTDOOR HEAT EXCHANGER
Abstract
For a space heating air source heat pump (ASHP) in the condition of low temperature and high humidity, frost on the surface of heat exchanger becomes the major cause decreasing heating surface area and thus the performance of heat pump. In this study, we showed a method of delaying the implantation of frost using alternate defrost control. First, we acquired the performance data for conventional periodic reversed-cycle defrosting with a 5RT heat pump. After the experiment, the heat pump was modified to verify the effects of newly introduced alternate defrosting and compared with the conventional periodic reverse cycled method. It was found that heating coefficient of performance (COP) of heat pump using newly proposed alternate defrost method was about 17% higher than conventional heat pump using periodic reverse cycled defrosting.
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Minimum COP of alternate defrosting method was 2.47 compared to 2.10 for conventional reverse-cycle defrosting.
“Minimum COP of alternate defrosting method was found 2.47 as compared to 2.10 of conventional reversecycle defrosting.”
Cites
Xia, Y., Zhong, Y., Hrnjak, P. S., & Jacobi, A. M. (2006) · International Journal of Refrigeration · doi:10.1016/j.ijrefrig.2006.03.005 · Cited by 148 · see citing works
Frost deposition on cold surfaces
Brian, P. L. T., Reid, R. C., & Shah, Y. T. (1970) · Industrial & Engineering Chemistry Fundamentals · doi:10.1021/i160035a013 · Cited by 142 · see citing works
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Patil, M. S., Seo, J.-H., & Lee, M.-Y. (2017) · Applied Thermal Engineering · doi:10.1016/j.applthermaleng.2016.11.107 · Cited by 86 · see citing works
- Authors
- JUNG, H., HWANG, J., & JEON, C.
- Affiliations
- Korea Electric Power Research Institute (KR)
- Yonsei University (KR)
- Mechanical Engineering, Korea National University of Transportation, 50 Daehak-Ro, Chungju 380-702, Korea
- ORCID
- HWANG, JUNGHO
- Venue
- International Journal of Air-Conditioning and Refrigeration
- Published
- 2014-09
- Volume
- 22
- Issue
- 03
- Pages
- 1450017
- ISSN
- 2010-1325 (ISSN-L)
- 2010-1333
- OpenAlex
- W2030656461
- Cited by
- 9
- References
- 2
- Citations by year
- 2023: 1 · 2020: 1 · 2019: 1 · 2018: 1 · 2017: 1 · 2016: 3 · 2015: 1
- FWCI
- 1.94
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- International Journal of Air-Conditioning and Refrigeration (publishedVersion)
- Topics
- Physical Sciences › Engineering › Mechanical Engineering › Refrigeration and Air Conditioning Technologies
- Physical Sciences › Engineering › Building and Construction › Building Energy and Comfort Optimization
- Physical Sciences › Engineering › Mechanical Engineering › Adsorption and Cooling Systems
- Keywords
- air-source heat pump, outdoor heat exchanger, frost formation, space heating, coefficient of performance
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