Journal of the Korean Society for Geothermal and Hydrothermal Energy (한국지열·수열에너지학회논문집)

Korean Society for Geothermal and Hydrothermal Energy (한국지열·수열에너지학회)
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The Performance Comparison of $CO_2$ Gascooler and Evaporator with Heat Exchanger Type

열교환기 형태에 따른 이산화탄소용 가스쿨러와 증발기의 성능비교

  • Bae, Kyung-Jin (Graduate School of Mechanical Engineering, Chosun University) ;
  • Cho, Hong-Hyun (Department Mechanical Engineering, Chosun University)
  • 배경진 (조선대학교 기계공학과 대학원) ;
  • 조홍현 (조선대학교 기계공학과)
  • Received : 2010.11.05
  • Accepted : 2010.11.15
  • Published : 2010.12.01
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Abstract

The natural refrigerants have used into HVAC equipments because the CFCs and HFCs have some environmental problems like high ODP and GWP. The carbon dioxide has small effect on the environmental problem but also good thermodynamics properties. In this study, the simulation study on the performance and characteristics of a $CO_2$ gascooler and evaporator using a fin-tube and microchannel heat exchanger has been conducted. Besides, the comparison of performance with operating condition was carried out in order to apply to the $CO_2$ heat pump system. As a result, the front sizes of a gascooler and evaporator using a microchannel were decreased by 63% and 58%, respectively, compared to those using a fin-tube. The performance of the fin-tube gascooler and evaporator were more responsive to the variation of operating conditions compared to that of microchannel. The pressure drop of a fin-tube heat exchanger was higher than that of a microchannel one.

Keywords

References

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