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

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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An Experimental Study on Heat Transfer Characteristics of Thermal Diode Type Enclosure Cavity

熱다이오식 밀폐공간의 熱傳達 特性에 關한 實驗的 硏究

  • 장영근 (국민대학교 자동차공학전문대학원) ;
  • 김석현 (국민대학교 기계공학과)
  • Published : 2000.12.01
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Abstract

Thermal diode is a device which allows heat to be transferred in one direction by convection due to density difference of fluid ,and blocks heat flow in the opposite direction. It is simple in construction and low in cost. And so, it is used as heat collection system of solar energy. In order to acquire a basic design data, thermal diode heat collection system has been studied experimentally for flux Rayleigh numbers from $2\times10^8\;to\;8\times10^8$. The heat transfer rate of this system is shown 10~47% higher than that of other earlier research results. He correlation obtained in this study is Nu=0.0037(Ra^*)^{0.429}(d^*)^{0.05}\frac{(Lr)}{H}^{0.415}$.

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References

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