대한기계학회논문집B (Transactions of the Korean Society of Mechanical Engineers B)

  • 제25권12호
  • /
  • Pages.1766-1775
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  • 2001
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  • 1226-4881(pISSN)
  • /
  • 2288-5324(eISSN)
대한기계학회 (The Korean Society of Mechanical Engineers)
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채널이 수막으로 완전히 덮여 있는 증발식 냉각기에서의 열 및 물질전달 해석

Analysis of Heat and Mass Transfer in an Evaporative Cooler with Fully Wetted Channel

  • 송찬호 (서울대학교 대학원 기계항공공학부) ;
  • 이대영 (한국과학기술연구원 열유동제어연구센터) ;
  • 노승탁
  • Song, Chan-Ho (Dept.of Mechanical Aerospace Engineering, Graduate School of Seoul National University) ;
  • Lee, Dae-Yeong (Heat Flowing Control Research Center, Korea Institute of Science and Technology) ;
  • No, Seung-Tak
  • 발행 : 2001.12.01
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초록

A theoretical analysis on the heat and mass transfer in an evaporative cooler is presented in this work. The evaporative cooler is modeled as a channel filled with porous media the interstitial surface of which is covered by thin water film. Assuming that the Lewis number is unity and the water vapor saturation curve is linear, exact solutions to the energy and vapor concentration equations are obtained. Based on the exact solutions, the characteristics of the heat and mass transfer in the evaporative cooler are investigated. The comparison of the cooling performance between the evaporative cooler and the usual sensible heat exchanger is also carried out. Obviously, the evaporative heat exchanger shows better cooling performance than the sensible heat exchanger. This is due to the latent heat of water vaporization, which results in apparent increases both in the interstitial heat transfer coefficient and the specific heat of the air stream in the evaporative cooler.

키워드

참고문헌

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