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題名 | 複合式毛細結構扁平熱管之性能分析=Composite Wick Structure Flat Heat Pipe Thermal Performance |
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作 者 | 謝宏榮; 陳育堂; 蔡聲鴻; | 書刊名 | 中華科技大學學報 |
卷期 | 48 2011.07[民100.07] |
頁次 | 頁57-65 |
分類號 | 471.6 |
關鍵詞 | 複合式毛細結構; 扁平式熱管; 奈米流體; 有效熱阻; Composite wick structure; Flat heat pipe; Nano-fluid; Nano-particle; |
語文 | 中文(Chinese) |
中文摘要 | 本研究為銀奈米流體應用於複合式毛細結構扁平式熱管之實驗。研究中使用純水與粒徑為30 nm之銀奈米顆粒合成之銀奈米流體作為工作流體。實驗中銀奈米流體濃度共計有三種:10mg/l、30mg/l和50mg/l,加熱瓦數則分別為5W至20W,此外利用自然對流的方式來進行冷卻(T(下標 amb)=30 ℃)。本研究以量測複合式毛細結構扁平式熱管之溫度分佈與溫度差來比較不同工作流體於熱管中之性能差異。當輸入功率為20瓦時,相同尺寸的銅片其加熱端與冷凝端溫差為5.215℃;而純水充填之扁平式熱管溫差為5.365℃,10ppm奈米流體之扁平式熱管溫差為3.76℃。由此可知,本研究所設計之奈米流體複合毛細結構之扁平式熱管在空間效益(Space Efficiency, S.E.)上可減少30.66%之溫度差異,而有效熱阻(Effective Thermal Resistance, E.T.R.)則可降低了27.9%。 |
英文摘要 | This study utilizes silver nano-fluid filled flat heat pipe. It is aimed at effect of various concentrations on composite wick structure flat heat pipe thermal performance by air-cooling testing equipment. The particles used in these experiments were silver particles 35 nm in size. The base working fluid was pure-water. Nano-fluids were prepared using a two-step method. In the experiment, the thickness and length of the heat pipe are 3 mm and 200 cm, respectively. An experimental system was set up to measure the temperature distribution of heat pipes and calculate the thermal resistance by equation R=△T/Q. At a same charge volume, the thermal resistance of heat pipe filled nano-fluid was lower than DI water. |
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