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

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
권호 표지

Effects of Working Fluid Filling Ratio and Heat flux on Correlations of Heat Transfer Coefficient in Loop Thermosyphon

루프 써모사이폰에서 작동유체 충액률과 열유속이 열전달계수의 상관식에 미치는 영향

  • 장기창 (한국에너지기술연구원 폐열이용연구센터) ;
  • 이기우 (한국에너지기술연구원 폐열이용연구센터) ;
  • 이영수 (충남대학교 기계설계공학과) ;
  • 유성연 (충남대학교 기계설계공학과)
  • Published : 2001.06.01
Download PDF
⟨ Previous Next ⟩

Abstract

Due to the coupling between momentum and energy transport theoretical analysis of the loop performance is very complicate, therefore it is necessary that these problems be solved by experimental investigation before applying th loop thermosyphon to heat exchanger design. The evaporator and condenser of the loop thermosyphon were made of carbon-steel, and distilled water was used as working fluid in the experiments. From the experimental data correlations of heat transfer coefficient for evaporator and condenser sections were obtained. For heat fluxes in th range of 13~78kW/$m^2$, the correlation equations of heat transfer coefficients in evaporator and condenser predict the experimental behavior to within $\p$\pm$5% and\;\pm20$% respectively.

Keywords

References

  1. the Final Report of Ministry of Commerce and Industry Development of heat exchanger with separate type heat pipe K.W.Lee;K.C.Chang;S.H.Hong
  2. Heat pipe science and technology Faghri, A.
  3. ASHRAE Transactions v.92 Experimental study of a two-phase thermosyphon loop heat exchanger McDonald, T. W.;Stauder, F. A.
  4. ASHRAE Transactions v.83 Thermosyphon loop performance characteristics: Part 2. Simulation Program Ali,A.F.M.;McDonald,T.W.
  5. Trans. of the JAR v.6 no.2 Flow and heat transfer characteristicsin a closed-type two-phase loop thermosyphon Imura, H.;Saito, Y.;Fujomoto, H.
  6. 5IHPC Experiments of heat transfer performance of separate type thermosyphon Chen,Y.;Gao,M.;Xin,M.
  7. 3IHPC Study on percentage of liquid filling of separate type heat pipe Mou,K.;Chang,H.
  8. the Thesis of Ph.D in Yonsei Univ. Study on the flow stability and heat transfer characteristics of closed rectangular thermosyphon loop T.Y.Kim
  9. Convective boiling and condensation(2nd ed.) Collier,J.G.
  10. Journal of Heat Transfer Transactions of the ASME v.110 Heat transfer behavior of a rectangular thermosyphon loop Huang, B. J.;Zelaya, R.
  11. Korea Journal of Air-Conditioning and Refrigeration Engineering v.10 no.9 Experimental sutdy on the heat transfer characteristics of separate type thermosyphon K.C. Chang;K.W. Lee;S.Y. Yoo
  12. Proceedings of the SAREK'99 Summer Annual Conference Correlation of heat transfer coefficient in separate type thermosyphon K.C. Chang;K.W. Lee;S.Y. Yoo
  13. Int. J. Heat Mass transfer v.24 Correlations for nucleate boiling heat transfer in forced convection Stephan, Karl;Auracher, Hein