search:熱對流係數wiki相關網頁資料

      • en.wikipedia.org
        Convection is the concerted, collective movement of groups or aggregates of molecules within fluids (e.g., liquids, gases) and rheids, either through advection or through diffusion or as a combination of both of them ... ...
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      • en.wikipedia.org
        As mentioned earlier in the article the convection heat transfer coefficient for each stream depends on the type of fluid, flow properties and temperature properties. Some typical heat transfer coefficients include ... ...
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    日期:2024-07-03
    自然對流是指在流體之間僅有溫度差存在時發生的運動,例如,熱空氣上升冷空氣 下降(因為熱空氣密度較冷 ... 参看:流体力学、努塞尔特数、格拉晓夫数和熱傳係數。...
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    日期:2024-07-04
    Seems a tad high. Most textbooks put it between 0.2 and 4 BTU/hr-ft^2- F http:// www.tufts. edu/as/tam pl/en43/le cture_note s/ch5.html However, your mileage may vary, so you can, and should, calculate it for your specific scenario: http://en.wikipedia.or...
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    日期:2024-07-03
    Le coefficient de convection thermique ou coefficient de transfert par convection est un coefficient de transfert thermique. Il permet de quantifier un transfert de chaleur réalisé par un phénomène de convection au sein d'un fluide en mouvement (contre un...
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    日期:2024-06-29
    La convection est un mode de transfert qui implique un déplacement de matière dans le milieu, par opposition à la conduction thermique ou à la diffusion de la matière. La matière est advectée (transportée-conduite, mais ces termes sont en fait impropres) ...
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    日期:2024-07-02
    黃老師您好. 近日有一問題困擾著我. 即是熱傳導率=某一溫度梯度下單位時間內流經 厚度為S 面積為A 之物體的熱量. 單位為W/m.K. 而熱傳導係數之定義為何....
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    日期:2024-07-04
    Convection is one of the major modes of http://wiki.answers.com/wiki/Heat_transfer and http://wiki.answers.com/wiki/Mass_transfer. Convective heat and mass transfer take place … through both http://wiki.answers.com/wiki/Diffusion and by http://wiki.answer...
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    日期:2024-06-29
    The equation for the overall heat transfer coefficient of a shell and tube heat exchanger is: 1/U = 1/hi + Rfi + Rfo + Rw + 1/ho Where U= overall heat transfer coefficien … t hi= inside convective heat transfer coefficient, determined by correlations Rfi=...
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    日期:2024-07-01
    給熱係數,是一個熱力學術語,主要應用於化學工程和物理學方面。給熱係數是用來 計算導熱的,尤其是在固體液體之間對流,或是發生相變的情況下。通常用h代表, ......