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 the Characteristic of Heat Transfer of PCM(Phase Change Material) at the Simultaneous Charging and Discharging Condition

동시 축·방열 조건에서 PCM의 열전달 특성에 관한 연구

  • Lee, Donggyu (Geothermal Energy Technology Research Center, Chonbuk National University) ;
  • Park, Sechang (Korea Construction Equipment Technology Institute(KOCETI)) ;
  • Chung, Dong-yeol (Thermal & Fluid System Group, Korea Institute of Industrial Technology(KITECH)) ;
  • Kang, Cheadong (Department of Mechanical Engineering & Geothermal Energy Technology Research Center, Chonbuk National University)
  • 이동규 (전북대학교 지열에너지연구센터) ;
  • 박세창 (건설기계부품연구원) ;
  • 정동열 (한국생산기술연구원 열유체시스템그룹) ;
  • 강채동 (전북대학교 기계공학과&지열에너지기술연구센터)
  • Received : 2016.06.15
  • Accepted : 2016.07.05
  • Published : 2016.08.10
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Abstract

A thermal storage systems was designed to correspond to the temporal or quantitative variation in the thermal energy demand, and most of its heat is stored using the latent and sensible heat of the heat storage material. The heat storage method using latent heat has a very complex phenomenon for heat transfer and thermal behavior because it is accompanied by a phase change in the course of heating/cooling of the heat storage material. Therefore, many studies have been conducted to produce an experimentally accessible as well as numerical approach to confirm the heat transfer and thermal behavior of phase change materials. The purpose of this study was to investigate the problems encountered during the actual heat transfer from an internal storage tank through simulation of the process of storing and utilizing thermal energy from the thermal storage tank containing charged PCM. This study used analysis methods to investigate the heat transfer characteristics of the PCM with simultaneous heating/cooling conditions in the rectangular space simulating the thermal storage tank. A numerical analysis was carried out in a state considering natural convection using the ANSYS FLUENT(R) program. The result indicates that the slope of the liquid-solid interface in the analysis field changed according to the temperature difference between the heating surface and cooling surface.

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References

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