拡散接合式充てんマトリックス熱交換器の伝熱特性

概要

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A new type of heat exchanger with a stacked-sphere matrix is proposed. This heat exchanger comprises several segments separated by spacers. Each segment has a stacked copper sphere matrix formed by diffusion bonding. The ratio between the effective conductivity of the test heat exchanger matrix λ_e and the conductivity of copper λ_<Cu> was 0.09. Experiments were conducted to ivestigate the heat transfer in the proposed heat exchanger. The following results were obtained. (1) The overall heat transfer coefficient of the proposed heat exchanger is about 5 times as high as that without diffusion bonding. (2) The friction factor of the proposed heat exchanger is about 1.5 times as high as that without diffusion bonding. (3) Calculated overall heat transfer coefficients are almost the same as measured overall heat transfer coefficients. (4) The heat exchanger effectiveness is constant for λ_e/λ_<Cu> above 0.2.
一般社団法人日本機械学会の論文
1996-06-25