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熱交換器ϕΔtとは何ですか?

2016-01-07View Original

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通常、熱交換器の設計においてはϕΔt値は()未満であってはならず、そうでない場合Δtmは経済的に不合理となる。 ここのϕΔtはどのように計算されるのでしょうか。ある本ではεΔtが使われていますが、教えてください!
Reply #22016-01-07
Q=KA△tmの式において、このパラメータはどのように計算に組み込むのでしょうか?実際のTMを掛けるのか、それともQの前に掛けるのか?どんな効率と言えるのか?

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