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曾憲中04

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Tzer-Ming Jeng, Sheng-Chung Tzeng, Wei-Ting Hsu, Po-Tsun Cheng

鄭澤明, 曾憲中, 徐維廷, 陳柏村

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2013年中華民國力學學會年會暨第37屆全國力學會議及第1屆國際力學會議

2013 Republic of China Society of Mechanics Conference and 37th National Meeting and 1st International Mechanical Mechanics Conference

Keywords：LED燈具散熱座、自然對流、熱傳、照度、石磨複材

Abstract：本文以實驗方法探討不同材質之LED燈具散熱座在自然對流狀態下對於熱傳特性與LED照度的影響，散熱座之尺寸與形狀係以市售PHILIPS LED 燈具散熱做為參考基準(型號MTER LED PAR38 MV)，為中空圓柱體具多個輻射排列競相鰭片的構型，共計測試四種模式的散熱座：（1）Model A---市售PHILIPS LED燈具散熱座；(2)Model B---具環型鋁合金導熱座之石磨複材（具銅合金粉末）散熱座；(3) Model Ｃ—具環型鋁合金導熱座之石磨負複材（具鋁合金粉末）散熱座 (4) Model Ｄ—具環型鋁合金導熱與發泡鋼材鰭片之石磨複材散熱座。研究結果顯示Model A雖然有較佳得熱傳特性，但本研究所提出之Model B、C與D的成本與重量都大幅降低，且經過2000小時的照度退衰測試證明四種模式得散熱座具有相近德光衰結果，因此，本研究提出之石磨複材LED散熱座是具有不錯的商機潛力。

This work experimentally investigated the material effect of heat sinks of LED lamps on the heat transfer and illumination characteristics tinder the free-convection condition. Total four kinds of lest heat sinks were employed: (I) Model A—the aluminum-alloy heat sink of the PHIILIPS LED lamp (Model no.: MASTER LED PAR38 MV); (2) Model B—the copper-alloy powder and composite-graphite heal sink with the annular aluminum-alloy conductive base; (3) Model C—the aluminum-alloy powder and composite-graphite beat sink with the annular aluminum-alloy conductive base; (4) Model l)—thc composite-graphite heat sink with the annular aluminum-alloy conductive base and copper-foam fins. The experimental results indicated that the heat-transfer capacity of the Model A heat sink was better than the other Models. However, the cost and weight of the composite-graphite heat sinks (i.e. Model B. Model C and Model D) were reduced much more by comparing with those of the Model A. Besides, the illuminations of these four kinds of heat sinks were similar after 2000- hour lighting continuously. Therefore, the composite-graphite heat sink is useful for the cooling of the LED lamp and the electric equipment. It has very large potential in the relevant target markets.

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