Journal of the Korea Academia-Industrial cooperation Society (한국산학기술학회논문지)

The Korea Academia-Industrial cooperation Society (한국산학기술학회)
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Numerical Analysis on the Effect of Corrugation Angle on the Performance of Humidifying Element

절곡각에 따른 가습소자의 성능에 대한 수치해석적 연구

  • Lee, Eul-Jong (Division of Mechanical System Engineering Incheon National University) ;
  • Kim, Nae-Hyun (Division of Mechanical System Engineering Incheon National University)
  • 이을종 (인천대학교 기계시스템공학부) ;
  • 김내현 (인천대학교 기계시스템공학부)
  • Received : 2015.01.14
  • Accepted : 2015.05.07
  • Published : 2015.05.31
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Abstract

In this study, the effect of corrugation angle on thermal performance of corrugated plate is numerically investigated with an aim to develop humidifying element. Numerical analysis was conducted for a range of corrugation angle (from $0^{\circ}/0^{\circ}$ to $60^{\circ}/60^{\circ}$ for equal angle and from $15^{\circ}/0^{\circ}$ to $15^{\circ}/60^{\circ}$ for unequal angle). Results revealed that both j and f factor increased as corrugation angle increased. Especially, f factor increased significantly at high corrugation angles. j and f factors of unequal angle plates and those of equal angle (obtained by averaging unequal angles) plates were approximately the same. The largest $j/f^{1/3}$, which implies the largest heat transfer rate per consumed power, was obtained at $15^{\circ}/15^{\circ}$. Existing correlations under- or over-predicted the present numerical results.

본 연구에서는 가습소자 개발을 목적으로 절곡형상이 전열판의 성능에 미치는 영향을 수치해석적으로 검토하였다. 수치해석은 절곡각을 변화시키며 ($0^{\circ}/0^{\circ}$에서 $60^{\circ}/60^{\circ}$사이의 등각도와 $15^{\circ}/0^{\circ}$에서 $15^{\circ}/60^{\circ}$사이의 엇각도) 수행되었다. 해석 결과 j와 f 인자 모두 절곡각이 증가할수록 증가하였다. 특히 f 인자는 절곡각이 큰 영역에서 급격히 증가하였다. 엇각도 전열판의 j, f 인자와 두 각을 평균내어 구한 등각도 전열판의 j, f 인자는 거의 같은 값을 나타내었다. 한편 동일 소비동력 대비 열전달량을 나타내는 $j/f^{1/3}$의 경우 $15^{\circ}/15^{\circ}$에서 가장 크게 나타났다. 기존 상관식은 본 수치해석 결과를 과대 또는 과소예측하였다.

Keywords

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