金属焼結多孔質管を用いた熱音響エンジン用熱交換器の伝熱性能向上

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タイトル別名
  • Heat transfer improvement in heat exchanger for thermoacoustic engine by sintered porous pipes

説明

Recently thermoacoustic engine is being used to recover latent and sensible heat. However, the heat exchanger which is loaded by thermoacoustic engine has low performance because of large thermal resistance of the gas side. The purpose of this study is improving heat exchanger equipped with sintered fiber metal porous materials into the pipes in order to enhance the heat flux. Porous materials have the characteristic of mixing the fluid in contact and expanding heat transfer area. In addition, these heat pipes have a less contact thermal resistance because of the sintered porous materials into tube wall. Conducted experiments to measure heat exchange for each pipes show that porous pipes have between 1.5 times and 2 times better heat exchange performance than conventional ones under the condition Reynolds number Re = 4500. Furthermore, heat exchanger using sintered fiber metal porous materials increase until 10 times the heat transfer rate in comparison with the conventional heat exchangers.

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