ナノ粒子層をウィックとするヒートパイプの伝熱性能に及ぼす充填率と作動流体の影響

抄録

In this research, the screen mesh wick contained in the copper tube container was pre-coated with a silica nanoparticle layer to enhance its capillarity to experimentally investigate its effect to enhance the heat transfer performance. In the experiment, the one end of the heat pipe was heated using a nichrome wire heater and the other end was cooled using saturated boiling pure water. In addition, effects of filling rate and nanofluid on thermal performance of heat pipes using nanoparticle layer as wick were explored. When the screen mesh was coated with the nanoparticle layer, the thermal resistances of BNW1 (bare tube / nanoparticle-coated mesh / pure water/filling ratio15.2%) decreased 39% in comparison with the ordinary heat pipe without nanoparticle layer, the R increased with a decrease in filling rate. On the other hand, the maximum heat transfer rate increased up to 1.48 times, the MHTR decreased with a decrease in filling rate. It was also shown that the heat transfer performances are improved further if the nanofluid is used as the working fluid.