G0600-4-3 固体微粒子添加による自励振動ヒートパイプの性能向上 : 粒子サイズと材質の影響(熱工学部門一般講演(4):伝熱(4))

概要

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The effect of solid particles on the performance of pulsating heat pipe (PHP) has been investigated by using looped PHP with water as working fluid. The PHP is made of copper tubes with 3 mm OD and 2mm ID, and the number of turns is 12. Lengths of heating, adiabatic and cooling sections are 50mm, 100mm and 50mm, respectively. In order to improve performance, particles of various size and material, that is, alumina particles (10μm, 0.6μm), copper particles (10μm, 3μm) and silver particle (0.1μm), were added. In case of alumina particles, it was found that the larger particle was more effective than the smaller one. On the other hand, in case of copper particles, there was no great difference between the two sizes. Silver particle was similar to copper particles in performance. Every particle in this experiment has an optimum concentration in the heat transport performance of PHP. Liquid plug oscillation was enhanced significantly by adding particle in proper concentration.
2010-09-04