Number：

103B_ME1_008

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Author：

鄭澤明、曾憲中、林昱全、林東震

Tzer-Ming Jeng，Sheng-Chung Tzeng，Yu-Quan Lin，Ding-Jhen Lin

Paper name：

天花板材質與上方空間對嵌入式LED燈具散熱性能之影響

Effects of the Ceiling’s Material and Upper Space on Heat Transfer of Inserted LED Lamp

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中華民國力學學會第三十八屆全國力學會議

THE 38^th National Conference on Theoretical and Applied Mechanics，Keelung，Taiwan，ROC，November 21-22，2014

Keywords：閉孔式發泡鋁材、熱傳、LED燈、天花板

Closed-cell aluminum foams，Heat transfer，LED lamp，Ceiling

Abstract： 本研究提出以閉孔式發泡鋁材做為多孔性輕金屬綠建材之基材，當LED燈具嵌入安裝時，可以藉由閉孔式發泡鋁材的相對高熱傳導能力，提供LED燈具增強散熱的可能。本研究以實驗方法量測當LED燈具嵌入閉孔式發泡鋁材天花板時的局部溫度分布與整體熱傳增益，對照組為木製天花板，散熱座之尺寸與形狀係以市售PHILIPS LED燈具散熱座為參考基準(型號MASTER LED PAR38 MV)，計測試三種石墨複材散熱座與市售PHILIPS LED燈具散熱座等散種模式的散熱座。實驗結果指出天花板上方空間高度對整體散熱性能並沒有顯著的影響，所以實際裝配時可採用較低的高空間高度；各式散熱座中以市售PHILIPS LED燈具散熱座的熱阻值最低，其嵌入閉孔式發泡鋁材天花板時的熱阻值僅約為嵌入木質天花板時的42%，而另外三款石墨複材散熱座有接近的熱阻值，同樣地，嵌入閉孔式發泡鋁材天花板時的熱阻明顯較低，僅約為嵌入木質天花板時的69%，證明閉孔式發泡鋁材天花板對幫助LED散熱有實質的幫助。

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. Total four kinds of test heat sinks were employed:(1) Model A –the copper-alloy powder and composite-graphite heat sink with the annular aluminum-alloy conductive base；(2)Model B – the aluminum-alloy powder and composite-graphite heat sink with the annular aluminum-alloy conductive base；(3)Model C – the composite-graphite heat sink with the annular aluminum-alloy conductive base and copper-foam find and (4) Model D – the aluminum-alloy heat sink of the PHILIPS LED lamp (Model no:MASTER LED PAR38 MV). The results indicate that the height of the present ceiling’s upper space was bot the sensitive parameter for heat transfer. Therefore，lower ceiling’s upper space is suitable for really installing. Among various heat sinks，Model D heat sink had the lowest total thermal resistance. The thermal resistance of the Model D heat sink inserting into the closed-cell aluminum-foam ceiling was only about 0.42 times of that inserting into the wooden ceiling. The other three heat sinks had the similar thermal resistances. The thermal resistances of those three heat sinks inserting into the closed-cell aluminum-foam into the wooden ceiling. This work demonstrates that the closed-cell aluminum-foam ceiling did help in the cooling of LED lamp.