오프셋 스트립 휜이 있는 협소 사각유로의 비등열전달

Abstract

An experimental study on saturated flow boiling heat transfer of R113 was performed in a vertical narrow rectangular channel with offset strip fins. Two-phase pressure gradients and boiling heat transfer coefficients in an electrically heated test section were measured in the range of quality 0∼0.6, mass flux 17∼43 kg/m2s, and heat flux of 500∼3,000 W/m2. Two-phase friction multipliers were determined as a function of Lockhart-Martinelli parameter. Local boiling heat transfer coefficients were analysed in terms of mass flux, heat flux and local vapor quality. Correlation for boiling heat transfer coefficients was proposed, which was in good agreement with experimental data.