Evaporation Heat Transfer Characteristics of a Porous Surface Supplied with a Water Thin Film
Shigeki Hirasawa, Takuya Nakajima, Tetsuya Urimoto, Tsuyoshi Kawanami, Katsuaki Shirai, Hiroyuki Toyoda and Yoshihiro Kondo
We experimentally study the evaporation heat transfer performance of porous surfaces supplied with water liquid film in saturation condition of water at 100°C. The porous surfaces are one, two and four layers of meshed plates with micro-channels of 0.3 mm width on the both side of the plate. Thin water liquid film is supplied by bubbles generated below the down faced heat transfer surface. We also measured the pool boiling heat transfer performance. We found that there is the optimum supply rate of water to enhance the evaporation heat transfer performance of the porous surfaces. The evaporation heat transfer performance of our porous surfaces is near the upper limit value of the pool boiling heat transfer performance of various porous surfaces..
Keywords: Evaporation Heat Transfer, Boiling, Heat Transfer Enhancement, Porous Media, Micro- Channel, Cross-Cut Grooves, Down Faced Surface, Thin Water Liquid Film, Bubble, Cooling of Microelectronic Components, Heat Pipe.