Number：

04_08曾憲中

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Name：

Sheng-Chung Tzeng

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Cooling-performance estimation of the composite-graphite heat sink with annular conductive base for LED lamp

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Keywords：Heat sink of LED lamps,free convection,heat transfer,illumination,composite-graphite material.

Abstract：This work experimentally investigated the material effect of heat sinks of  LED lamps on the heat transfer and illumination characteristics under the free-convection condition.The experimental results indicated that the heat-transfer capacity of the pure aluminum-alloy heat sink was better than those of the composite-graphite heat sinks.However,the cost and weight of the composite-graphite heat sinks were reduced much more by comparing with those of the pure aluminum-alloy heat sink.Besides,the illuminations of these test 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 large potential in the relevant markets.

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