Korean Journal of Air-Conditioning and Refrigeration Engineering (설비공학논문집)

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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A Study on Performance Improvement of a Heat Pump Dryer with an Extra Evaporator Outside

보조 외부 증발기를 이용한 히트펌프 건조기 성능 향상에 관한 연구

  • Lee, Young-Lim (Department of Mechanical and Automative Engineering, Kongju National University) ;
  • Park, Sang-Jun (Department of Mechanical Engineering, Graduate School, Kongju National University) ;
  • Hwang, Il-Sun (Department of Mechanical Engineering, Graduate School, Kongju National University)
  • 이영림 (공주대학교 기계자동차공학부) ;
  • 박상준 (공주대학교 대학원 기계공학과) ;
  • 황일선 (공주대학교 대학원 기계공학과)
  • Received : 2012.05.11
  • Published : 2012.10.10
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Abstract

A heat pump dryer for the frozen food needs to preheat the air to a certain temperature where condensation can efficiently occur. In this study, an analysis of a heat pump dryer performance with operating conditions, an analysis of supplying heat with internal and external evaporators and a warm-up experiment with the evaporators have been performed. The results showed that the external evaporator can significantly accelerate the warm-up time of the dryer, so that it can reduce power consumption greatly. The use of the external evaporator is more efficient for higher ambient temperature. In addition, it was found that COP decreases and the range of evaporating pressure for the evaporator becomes narrower as the condensing temperature of the condenser increases.

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References

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