平板型熱管之毛細結構對散熱模組性能影響

Thermal Performance of Flat Plate Heat Pipe using Different Wick Structures

賴俊傑(Chun-Chieh Lai)

指導教授 ： 邱六合

大同大學/工程學院/材料工程學系所/碩士(2005年)

摘要

本研究主要探討平板型熱管(Flat Plate Heat Pipe)之毛細結構對散熱模性能影響。以小尺寸之平板型熱管進行網目式、溝漕式與燒結式之不同毛細結構作為實驗設計，尺寸為51mm*39mm*9 mm，再針對工作流體的種類、工作流體的填充量與不同風扇和散熱鰭片進行分析與研究。最後將不同毛細結構所組成的散熱模組進行相互的比較，其中加熱面積為31mm*31mm。研究結果顯示，不同種類的工作流體對於三種毛細結構所組成的散熱模組之影響不太，但填充量對於三種毛細結構的整體散熱性能有著很大的影響，其中燒結式平板型熱管在填充120 ﹪的工作流體量時，會有較低的熱阻值，較好的熱傳特性。在整體散熱模組的熱傳特性比較上，利用燒結式所製成的平板型熱管具有較低的熱阻值(約為0.33℃/W)。而本研究所設計出來的散熱模組之熱阻值為0.3～0.4℃/W，仍距THERMACORE公司所提出之平板型熱管理論熱阻值0.059℃/W仍有一段差距，推測除了有尺寸上的效應外，腔體內部二相流體運作及啟動的機制及參數尚未明確掌握，亦是此散熱模組未達到預期效能的重要因素之一，往後也將更進一步深入探討與研究會影響熱傳因素的項目。

關鍵字

平板型熱管 ； 毛細結構

並列摘要

The thermal performance of flat plate heat pipe using different wick structures has been studied. The wick structures of specimens including mesh, groove and sintered copper powder were made to form flat plate heat pipe. The designed dimension of the flat plate heat pipe is length 51mm, width 39mm, height 9mm. The research is mainly focused the effects of types of working fluid and working fluid amount efficiency for the flat plate heat pipe. Thermal performance of the flat plate heat pipe was experimentally evaluated in a fan-heat sink CPU testing apparatus with a heating area of 31mm×31mm. The results show that different types of working fluid does not present much influence for three wick structures of the flat plate heat pipe. However, amount of working fluid is an obvious effecting parameter on the heat dissipation performance of flat plate heat pipe. By the way, sintered copper wicks of three wick structures was shown lower thermal resistance (about 0.33 ℃/W) when stuffing amount of working fluid was 120%. The thermal resistance values of the investigation were measured about 0.3℃/W~0.4℃/W.

並列關鍵字

copper powder ； flat plate heat pipe ； groove ； mesh ； Sintered ； wick structure

參考文獻

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