着霜を伴うフィン付管群形熱交換器の特性に関する研究 : 第2報,各列の熱伝達特性と圧力損失について

概要

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The effects of frosts deposition on heat transfer and pressure drop were investigated using a finned tube heat exchanger composed of four rows. The concentration of water vapor decreases along the direction of air flow due to mass transport in the upstream section, so that the frost layer is thickest on the lst row and becomes thinner along the direction of air flow. The efficiency of heat transport strongly dependes on the number of rows in the heat exchanger since it relates to the growth of the frost layer. The increase in pressure drop through the heat exchanger due to frosting is related to the Reynolds number and the modified diameter after consideration of the frost thickness. It is found that the total pressure loss is calculated as the sum total of the pressure loss for each row.
一般社団法人日本機械学会の論文
1990-01-25