ナノ流体のプール沸騰熱伝達率へ及ぼす効果について

抄録

Saturated pool boiling heat transfer experiment was performed for the water-base alumina nanofluid of 0.5g/L particle concentration. The thickness and surface roughness of the nanoparticle layer formed on the heat transfer surface were measured. The pool boiling heat transfer coefficient was enhanced slightly in comparison with that in pure water. Then, pool boiling heat transfer experiment was performed using pure water and the nanoparticle-layer deposited heat transfer surface. The heat transfer coefficient was deteriorated in this case, indicating that the nanoparticle layer formed on the heat transfer surface during nucleate boiling in nanofluid acts as a thermal insulation material. The heat transfer enhancement measured in the nanofluid pool boiling in this work can hence be attributed to the nanoparticles dispersed in liquid.