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

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

Cooling Enhancement Potential of an Air-Cooled Condenser by Evaporative Cooling

증발냉각에 의한 공랭 응축기의 성능향상 가능성에 관한 연구

  • 이대영 (한국과학기술연구원 열·유동제어연구센터) ;
  • 백영진 (한국에너지기술연구원 미활용에너지연구센터) ;
  • 김영일 (한국과학기술연구원 열·유동제어연구센터)
  • Published : 2004.03.01
Download PDF
⟨ Previous Next ⟩

Abstract

This paper describes the potential advantages in applying evaporative cooling to air-cooled condensers. The cooling characteristics of an air-cooled condenser with its surface fully covered with thin water film are investigated and compared with that of an air-cooled condenser with usual dry surface. By applying the evaporative cooling, the cooling performance of the condenser is shown to improve enormously. When the outdoor air is 35$^{\circ}C$ and 40% in relative humidity, the condensing temperature of the refrigerant is decreased by 2$0^{\circ}C$. Even when the incoming air is fully saturated with water vapor, the evaporation from the wet surface occurs to cause a decrease in the condensing temperature by 1$0^{\circ}C$. The main reason for this improvement is assessed as the addition of an efficient cooling mechanism which is the water evaporation resulting in latent heat absorption.

Keywords

References

  1. J. Heat Transfer v.106 Study of heat and mass transfer in a vertical-tube evaporative cooler Perez-Blanco,H.;Bird,W.A. https://doi.org/10.1115/1.3246637
  2. J. Heat Transfer v.118 Experimental and theoretical studies of mist jet impingement cooling Graham,K.M.;Ramadhyani,S. https://doi.org/10.1115/1.2825850
  3. Int. J. Heat and Mass Transfer v.43 Evaporative cooling of continuously drawn glass fibers by water sprays Sweetland,M.;Lienhard,V.J.H. https://doi.org/10.1016/S0017-9310(99)00180-5
  4. J. Heart Transfer v.103 A general theory of wet surface heat exchangers and its applications to regonerative evaporative cooling Maclaine-Cross,I.L.;Banks,P.J. https://doi.org/10.1115/1.3244505
  5. J. Heart Transfer v.105 The thermal performance of the wet surface plastic plate heat exchanger used as an indirect evaporative cooler Kettleborough,C.F.;Hsieh,C.S. https://doi.org/10.1115/1.3245587
  6. Int. J. Refrig. v.21 no.6 Effectiveness of crossflow plate heat exchanger for indirect evaporative cooling Stoitchkov,N.J.;Dimitrov,G.I. https://doi.org/10.1016/S0140-7007(98)00004-8
  7. Improving heat pump performance via compressor capacity control-analysis and test Hiller,C.C.;Glicksman,L.R.
  8. ORNL/CON-80/R1, Oak Ridge National Lab The Oak Ridge heat pump models: Ⅰ. A steady-state computer design model for air-to-air heat pumps Fischer,S.K.;Rice,C.K.
  9. NISTIR 89-4133 EVSIM-An evaporator simulation model accounting for refrigerant and one dimensional air distribution Domanski,P.A.
  10. The Korean Society of Mechanical Engineers Symposium Series: Thermal and Fluid Engineering Section Modeling of cross-flow fin-tube evaporator Yoon,B.;Yoo,K.C.;Park,H.Y.;Kim,Y.S.
  11. Ind, Eng. Chem. v.26 Mass transfer (absorption) coefficients Chilton,T.H.;Colburn,A.P. https://doi.org/10.1021/ie50299a012
  12. ASHRAE HANDBOOK 1997 FUNDAMENTALS ASHRAE
  13. Convective Heat and MAss Transfer(3rd ed.) Kays,W.M.;Crawford,M.E.
  14. Korean Journal of Air-Conditioning and Refrigeration Engineering v.11 no.4 Air-conditioner cycle simulation using tube-by-tube method Yoon,B.;Park,H.Y.;Yoo,K.C.;Kim,Y.C.
  15. International Journal of Heat and Mass Transfer v.22 A general correlation for heat transfer during film condensation in-side pipes Shah,M.M. https://doi.org/10.1016/0017-9310(79)90058-9
  16. Proc. of 8th Int. Heat Transfer Conference Heat transfer and friction correlations for plate finned tube heat exchangers having plain fins Gray,D.L.;Webb,R.L.
  17. Journal of the ASRE, Refrigerating Engineering v.4 Heat transfer calculations for extended surface Schmidt,T.E.
  18. Thermal Environmental Engineering Threlkeld,J.L.
  19. Int. J. Heart Mass Transfer v.46 Heat transfer enhancement in an air-cooled heat exchanger by evaporative cooing Song,C.H.;Lee,D.Y.;Ro,S.T. https://doi.org/10.1016/S0017-9310(02)00405-2