Solar Energy (태양에너지)

The Korean Solar Energy Society (한국태양에너지학회)
권호 표지

Evaluation of U-value for Radiant Barrier Systems in Relation to Surface Emissivity

표면방사율에 따른 복사단열시스템의 열관류성능 평가 연구

  • Kim, K.S. (Korea Institute of Energy Research) ;
  • Lee, D.G. (Korea Institute of Energy Research) ;
  • Yoon, J.H. (Dep. of Architectural Engineering, Taejon National University of Technology) ;
  • Song, I.C. (Dep. of Architectural Engineering, Chungnam National University)
  • 김기세 (한국에너지기술연구소) ;
  • 이동규 (한국에너지기술연구소) ;
  • 윤종호 (대전산업대학교 건축공학과) ;
  • 송인춘 (충남대학교 건축공학과)
  • Published : 2000.09.30
Download PDF
⟨ Previous Next ⟩

Abstract

Radiant barrier systems(RES) constructed with low emissivity materials bounded by an open air space can be used to reduce the net radiation transfer between two surfaces. To analyze the heat transfer characteristics of the radiant barrier systems which consist of a single-glass and radiation barriers, a simple theoretical model based on energy balances was suggested. And the model was validated by means of the experimental results. Using a guarded hot box, the temperatures of layers in selected RES and energy use for each cases were measured. The results show that the model well explained the heat transfer characteristics of those RES. Also, the heat transfer coefficient correlations considering natural and forced convection heat transfer ware suggested. It is found that the heat transfer efficiency of a RBS with aluminium surface improved up to 66.6% over that of a single glazing system.

Keywords