Performance evaluation and modeling of a hybrid cooling system combining a screw water chiller with a ground source heat pump in a building
- Authors
- Jeon, Jongug; Lee, Sunil; Hong, Daehie; Kim, Yongchan
- Issue Date
- 5월-2010
- Publisher
- PERGAMON-ELSEVIER SCIENCE LTD
- Keywords
- Ground source heat pump (GSHP); Screw water chiller; HVAC system; Modeling
- Citation
- ENERGY, v.35, no.5, pp.2006 - 2012
- Indexed
- SCIE
SCOPUS
- Journal Title
- ENERGY
- Volume
- 35
- Number
- 5
- Start Page
- 2006
- End Page
- 2012
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/116551
- DOI
- 10.1016/j.energy.2010.01.016
- ISSN
- 0360-5442
- Abstract
- The performance of a hybrid cooling system that combines a screw water chiller with a ground source heat pump (GSHP) was measured and analyzed at various cooling loads. In addition, the hybrid cooling system in a building was modelled sophisticatedly using EnergyPlus and then validated with the measured data. The coefficient of performance of the GSHP was lower than that of a conventional chiller in the monitored building, but the hybrid cooling system helped to stably provide the required cooling capacity at high-load conditions. The mean bias error and the normalized root-mean squared error of the predicted cooling load of the building were -8% and 12.4%, respectively. The hybrid cooling system was simulated by varying four operating parameters: the operating schedule, chilled water temperature (T-cw), dry-bulb temperature (T-DB), and entering water temperature (T-EW). The Tcw is ascertained as being the most effective control parameter in the hybrid cooling system. (C) 2010 Elsevier Ltd. All rights reserved.
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Collections - College of Engineering > Department of Mechanical Engineering > 1. Journal Articles
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