摘要
本研究的主要目的在於探討雙孔徑毛細結構(biporous wick)內不同的孔徑分佈 對迴路式熱管性能(LHP)之影響效應。實驗過程中改變孔洞成型劑的粒徑與含量來 調控毛細結構內的雙孔徑分佈曲線，並利用統計方法分析雙孔徑毛細結構的性能 測試結果，以取得2階因子間兩項變數的統計經驗模型(孔洞成型劑的大小： 48~62μm與74~88μm Na2CO3、孔洞成型劑的含量：20vol%與25vol%)，藉此找出較 佳的雙孔徑分佈曲線型態。最後，再進一步與單孔徑毛細結構(monoporous wick) 做熱傳量的比較。 研究結果顯示：目前實際製作結果獲得較佳的雙孔徑毛細結構，似乎傾向於 孔洞成型劑含量多(25vol%)且較小粒徑(48~62μm)的方向。其中又以改變孔洞成型 劑的含量(貢獻百分比B＝80%)對結果的影響最為明顯。在熱沉10℃與容許溫度 85℃下，較佳的雙孔徑毛細結構其熱傳量可達350W且熱阻為0.19℃/W，較單孔徑 毛細結構的熱傳性能300W與熱阻為0.23℃/W來得佳。不僅能擁有較高的熱傳量， 且能有效的降低熱阻，對於未來高熱通量的諸多應用場合是相當引人注目的。
並列摘要
The purpose of this study was to investigate the effects of various pore size distributions of biporous wicks for a Loop heat pipe (LHP). The study was conducted following a statistical method using a two-level factorial plan involving three variables (particle size of pore former：48~62μm and 74~88μm Na2CO3, pore former content： 20vol% and 25vol%). Finally, a comparison was made between monoporous wicks and biporous wicks for the heat transport capability of the LHP. Experimental results showed that the better parameters of the biporous wick seem to tend to more pore former contents (25vol%), and smaller particle size of pore former (48~62μm), in particular pore former content (percent contribution B＝80%). At the sink 10 ℃ and the allowable evaporator temperature 85℃, the heat transfer capacity of the better biporous wick achieved 350W and the thermal resistance was 0.19 /W ℃ . In comparison to a monoporous wick for 300W and 0.23 /W, the performance is ℃ enhanced. LHPs with biporous wicks are very attractive for high heat flux applications in the future.