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

The Korean Society of Mechanical Engineers (대한기계학회)
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Thermal Performance of an Enthalpy Exchanger Made of Paper at Different Outdoor Temperatures and Humidities

외기 온·습도 변화에 따른 종이재질 전열교환 엘리먼트 성능에 관한 연구

  • Kim, Nae-Hyun (Dept. of Mechanical Engineering, Univ. of Incheon) ;
  • Lee, Eul-Jong (Dept. of Mechanical Engineering, Univ. of Incheon) ;
  • Song, Kil-Sup (Dept. of Mechanical Engineering, Univ. of Incheon) ;
  • Oh, Wang-Kyu (Dept. of Mechanical Engineering, Univ. of Incheon)
  • Received : 2009.12.31
  • Accepted : 2010.05.24
  • Published : 2010.07.01
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Abstract

An enthalpy exchanger in which heat and moisture transfer occur between the indoor and outdoor air operates at various outdoor conditions. In this study, the effect of the outdoor-air temperature and humidity on the performance of an enthalpy exchanger was experimentally investigated. An apparatus was specially-made to accurately measure the incoming and outgoing dry- and wet-bulb air temperatures as well as the flow rates. Tests were conducted in constant-temperature and constant-humidity chambers at different outdoor temperatures and humidities. It is shown that the effectiveness of latent-heat exchange increases as the relative humidity increases; further, this effect exhibited minimal dependence on the absolute humidity. However, the effectiveness of sensible-heat exchange is independent of both temperature and humidity

전열교환 엘리먼트는 열회수형 환기유닛의 핵심부품으로, 외기와 실내공기의 열 및 수분교환이 이루어진다. 본 연구에서는 현재 국내에서 사용되고 있는 전열교환 엘리먼트에 대하여 외기의 온 습도 변화가 전열교환 엘리먼트의 성능에 미치는 영향을 실험적으로 연구하였다. 전열교환 엘리먼트를 통과 하는 공기 유량, 입 출구의 건 습구 온도를 정밀하게 측정할 수 있는 실험장치를 특별히 제작하였고, 항온항습실내에서 외기의 상대습도 또는 절대습도를 변화시키며 실험을 수행하였다. 실험결과는 현열전달 유용도과 잠열전달 유용도으로 평가되는데 잠열 전달 유용도는 외기의 상대습도의 증가에 따라 증가하였으나 절대습도의 변화에는 거의 무관하게 냐타났다. 한편 현열 교환 유용도는 외기의 온도 및 습도 변화에 무관하게 일정하였다.

Keywords

References

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