Number：

103B_ME1_022

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Author：

 Tzer-Ming Jeng，Sheng-Chung Tzeng，Po-Tsun Chen，Wei-Kai Huang

Paper name：

Heat Transfer Analysis for Line-Finned Heat Sink with Vertical Passages

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Keywords：Free convection，Finned heat sink，Vertical passage，Experiment.

Abstract：Using heat sink to increase the cooling area is the most familiar and fundamental method in LED heat management technology. We develop a new configuration of finned heat sink for LED lamp. It is a circular cylinder with many plate fins radially arranged on the external surface. There are many straight ducts inside the peripheral wall of the cylinder. These ducts form the chimney ef-fect to enhance the heat transfer. This work experimentally investigated the chimney effect on the heat transfer characteristics of the finned heat sink under the free convection state. The aluminum-alloy plate spreader with two vertical plate fins was selected as the control group but had a vertical pas-convection performance for the present test heat sink.