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鄭澤明18

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鄭澤明, 曾憲中, 黃彥慈

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不同長度與高度之堆疊黃銅粒密實床之內部熱傳係數測定

Determination of Interstitial Heat Transfer Coefficients in Brass-Beads packed Beds of Various Lengths and Heights

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2014綠色科技工程與應用研討會(GTEA)

2014 Green Technology Engineering and Applications Symposium (GTEA)

Keywords：Porous media, interstitial heat transfer coefficients, packed brass-bed, experiment.

Abstract：本文提出一種較簡便的多孔性介質內部熱傳係數估算實驗法，它是利用加熱壁與流體間的等效熱傳係數的實驗量測法配合一種運用鰭片理論與熱網絡觀念的計算法則來測定估算，由於不須另外執行繁複的數值模擬計算，可以使多孔性介質的內部熱傳係數的估算更為簡便，此外，也將利用本文的方法分析測定堆疊的黃銅粒密實床的內部熱傳係數，並探討黃銅粒之粒徑、密實床長度與高度等因素對內部熱傳係數的平均值與沿流向之局部分布值的影響，最後並整理得出相關的內部熱傳係數的經驗公式。

This study proposed a simple method to estimate the interstitial heat transfer coefficients of porous media. This method used the experimental of wall-to-fluid heat transfer coefficients coupling with the algorithm model with the fin theory and the thermal network concept to obtain the interstitial heat transfer coefficients. There is no complicated numerical calculation, making the estimation of interstitial heat transfer coefficients of porous media more simple. Besides, this study also measured the interstitial heat transfer coefficients of the packed brass-bead bed by using the present method. The effects of the bead’s were investigated systematically. Finally, the relevant correlation of interstitial heat transfer coefficients was provided.

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