Eko Siswanto, Hiroshi Katsurayama, Yasuo Katoh
Laminar condensation in porous media, considering thermal and effective thermal conductivity, treated by ambient temperature is experimentally studied. The aim of this study is to observe behavior of the transferred heat and the extracted condensate to determine both the effective- and the efficient-condensation via condensate thickness and heat flux ratio on the system. This test is conducted by streaming the humidified-air over the upper-face of porous glass-beads and aluminaballs media, in a chamber covered by the controlled ambient temperatures. The humid air is varied in temperature and held on laminar flow. As for first treatment, ambient temperature is maintained constantly, whereas for the next treatment, temperature ratio of ambient to humid-air is kept unity. In this study, based on the Jacob number evaluation, it can be found that the heat transfer dominates to control the condensation, whereas the inertia force plays a minor influence. Treatment-I affects significantly to condensate thickness, together with vapor concentration and thermal conductivity of media layer. Furthermore, by using heat flux ratio calculation, it is obtained that the glass beads media under treatment-I lies on the highest ratio. © 2011 Pushpa Publishing House.
Science and Engineering, Mechanical Engineering Department, Yamaguchi University, Ube, Yamaguchi 755-8611, 2-16-1 Tokiwadai, Japan; Mechanical Engineering Department, Brawijaya University, Malang, Indonesia
