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曾憲中06

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鄭澤明, 曾憲中, 陳柏村, 林東震

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具煙囪孔道之鰭片式散熱座之自然對流熱傳特性研究

Free Convection Heat Transfer Characteristics of Finned Heat Sinks with Chimney Ducts

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2013年彰雲嘉大學校院聯盟學術研討會

2013 Chang Yun Jia League colleges Symposium

Keywords：煙囪效應、自然對流散熱傳、鰭片式散熱座、實驗

Abstract：本文以實驗方法探討煙囪效應對鰭片式散熱座之自然對流熱傳特性的影響，測試段以鋁合金製成，其購型包括(1)不具/具煙囪孔道之平板鰭片散熱座(Model A與Model B)、(2)不具/具煙囪孔道之低的環狀鰭片散熱座Model C與Model D，高度25mm)與(3)不具/具煙囪孔道之高的環狀鰭片散座(Model E與Model F，高度50mm)，實驗結果顯示煙囪孔道確實能使本研究所用的鰭片散熱座增強8.3~14.9%的自然對流熱傳能力，此外，熱傳增強將隨散熱座高度減少而降低，相關研究結果將可作為未來設計煙囪孔道之鰭片式散熱座構型的重要參考。

This work systematically studied the design and heat transfer characteristics of the porous light-metal green building materials. The base materials of this porous light-metal green building materials were closed-cell aluminum foams. When the LED lamp is inserted into this porous materials, the porous materials may enhance the heat transfer capacity of the heat sink of LED lamp due to their high thermal conductivity. This work experimentally measured the local temperature distributions and the total heat transfer performance of the LED lamp inserted into the aluminum-foam ceiling. The control group was the wooden ceiling, The experimental results indicate that the present porous ceiling reduced the total thermal resistance of LED lamp by 20%. Besides, the fire-insulation level of the closed-cell aluminum-foam materials are much higher than those of wooden materials; while the density of the front is somewhat lower than that of the rear. This study demonstrates the potential of the closed-cell aluminum foams as the light and safe green building materials with fire-insulation function.

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