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Boiling Heat Transfer in a Narrow Rectangular Channel with Offset Strip Fins  

Kim Byong Joo (Department of Mechanical and System Design Engineering, Hongik University)
Jeong Eun Soo (Department of Mechanical and System Design Engineering, Hongik University)
Sohn Byong Hu (Korea Institute of Construction Technology)
Publication Information
Korean Journal of Air-Conditioning and Refrigeration Engineering / v.16, no.10, 2004 , pp. 977-983 More about this Journal
Abstract
An experimental study on saturated flow boiling heat transfer of R113 was peformed 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 $0{\sim}0.6$, mass flux $17{\sim}43kg/m^{2}s$, and heat flux of $500{\sim}3,000W/m^2$ 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.
Keywords
Flow boiling heat transfer; Narrow rectangular channel; Offset strip fins; Two-phase friction multiplier; Reynolds factor;
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