Journal of the Korean Solar Energy Society (한국태양에너지학회 논문집)

The Korean Solar Energy Society (한국태양에너지학회)
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Heat transfer characteristics of Triple-Tube Type Latent Heat Storage Tank

3중관 튜브형 잠열 축열조에서의 열전달 특성 연구

  • Lee, W.K. (Department of Chemical Engineering, Sungkyunkwan University) ;
  • Han, G.Y. (Department of Chemical Engineering, Sungkyunkwan University) ;
  • Kang, Y.H. (Korea Institute of Energy Research)
  • 이욱균 (성균관대학교 화학공학과) ;
  • 한귀영 (성균관대학교 화학공학과) ;
  • 강용혁 (한국에너지기술연구소)
  • Published : 2001.03.31
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Abstract

The heat transfer experiment in a latent heat storage tank as a solar energy storage system for the hot water supply was carried out. The latent heat storage tank was consisted of triple - tube type ; Outer shell for hot water from solar collector, PCM storage vessel in the middle of the tank and inside tube for hot water recovery. The heat storage tank has the dimension of 60 cm long and 34 cm outside diameter. Paraffin wax(m.p = 55.4C) and sodium acetate trihydrate(m.p = 58 C) were employed as the PCM this study. Experimental variables were inlet temperature and flow rate of the hot water for heat storage stage and cold water for heat recovery stage. Temperature profiles, heat transfer coefficient and the efficiency of heat storage$(Q/Q_{max})$ and heat recovery $(Q/Q_{max})$ were determined for the paraffin wax and inorganic salt respectively.

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