Number：

103B_ME1_007

Download

全文檔   摘要檔

Name：

Titles：

Author：

鄭澤明、曾憲中、張嘉宏、黃彥慈、彭筱芸

Tzer-Ming Jeng，Sheng-Chung Tzeng，Chia-Hung Chang，Yan-Chi Huang，Hisao-Yun Peng

Paper name：

主動式LED石墨複材散熱座之製作與性能測試

The Manufacture and Performance Test of the Active Graphite-Composite Heat Sink for LED lamp

Name of activity：

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：LED散熱座、石墨複材、馬達風扇、通氣孔道、強制對流、實驗。

LED heat sink，Graphite-composite materials，Motor fan，flow passages，Forced convection，Experiment

Abstract：

本研究提出「主動式LED石墨複材散熱座」之設計與製作，並以實驗方法量測不同模式之散熱座測試段的熱傳特性，散熱座以石墨粉末、鋁合金粉末與膠合劑利用真空加壓射出製成，材料成本與整體重量均較傳統全鋁合金製成之散熱座要大幅降低，散熱座的基本構型為中空圓柱體具多個輻射排列徑向鰭片，中空圓柱腔體內可置入不同尺寸之馬達風扇，配合石墨散熱座之通氣孔道，達到強制對流冷卻效果，實驗結果指出，具馬達風扇之模式的整體熱傳係數(h)約是不具馬達風扇之模式的1.2~1.6倍，而其中24x2側孔構型又比24x1側孔構型獲得略佳之整體熱傳，顯示內建之馬達風扇與通氣孔道開口的匹配對熱傳是有影響；最後，實驗也研究了馬達尺寸與功率對整體熱傳的影響，結果指出對熱傳增益的差別並不顯著。

This work designed and manufactured an active LED graphite-composite heat sink and experimentally investigated the heat transfer characteristics of such heat sinks. The heat sink was made of graphite powders，metallic powders and latex by injection molding with the specified ratio of mixtures. By comparing with the traditional full aluminum-alloy heat sink，the cost and weight of the present heat sink are reduced remarkably. The basic configuration of this heat sink is hollow circular cylinder with radially arranged cooling finds. The motor fan can be mounted in the container of the heat sink. Coupling with the flow passages and the partition in the heat sink，it can obtain the forced convection cooling effect. The experimental results indicate that the overall heat transfer coefficient(h)of the heat sink with a motor fan was 1.2~1.6 times of that without any air-driving device. The h value of the heat sink with 24x2 lateral passages was somewhat higher than with 24x1 lateral passages，suggesting that the fit of the motor fan and the flow passages’open ends did influence heat transfer. Finally，this study also demonstrated that heat transfer enhancement did not influenced by the size and rated power of the motor fan herein.