Pool Boiling on Modified Surfaces Using R-123

Pool boiling from GEWA surfaces in water and R-113

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Roughness Effects on Nucleate Pool Boiling of R-113 on Horizontal Circular Copper Surfaces

The present paper is an experimental investigation of roughness effects on nucleate pool boiling of refrigerant R113 on horizontal circular copper surfaces. The copper samples were treated by different sand paper grit sizes to achieve different surface roughness. The average surface roughness of the four samples was 0.901, 0.735, 0.65, and 0.09, respectively. The experiments were performed in t...

Analysis of pool boiling heat transfer over porous surfaces

A semi-empirical model for pool boiling over porous surfaces is presented. The pressure drop across the porous surface is estimated using Darcy 's law. The signi®cance of the latent heat ̄ux contribution for highly porous surfaces is examined. Two nucleation factors are de®ned and correlated in terms of measurable quantities using literature data. An expression for the total heat ̄ux in terms o...

Pool boiling of nanoparticle-modified surface with interlaced wettability

This study investigated the pool boiling heat transfer under heating surfaces with various interlaced wettability. Nano-silica particles were used as the coating element to vary the interlaced wettability of the surface. The experimental results revealed that when the wettability of a surface is uniform, the critical heat flux increases with the more wettable surface; however, when the wettabil...

Secondary pool boiling effects