可撓式熱管性能研究分析

Study and Analysis of Performance of Flexible Heat Pipe

陳建瑋(CHIEN-WEI CHEN)

指導教授 ： 卓清松

國立臺北科技大學/機電學院/能源與冷凍空調工程系碩士班/碩士(2012年)

摘要

本研究主要針對可撓式熱管在經過拉伸實驗後進行熱響應實驗與熱阻實驗，並對其性能變化進行研究與探討。本實驗研究之可撓式熱管的蒸發段與冷凝段材質為銅，而絕熱段材質為不鏽鋼，內部毛細結構為金屬網目式，使用純水做為工作流體。在蒸發段與絕熱段及冷凝段三段連接熱耦線量測其溫度變化，探討其熱響應速度、平衡時間及熱阻。實驗結果顯示彎曲角度的改變會影響到整體熱響應的時間以及溫差，然而隨著拉伸次數的增加，彎曲角度對於蒸發段與冷凝段之影響會變小許多，但是卻十分明顯的影響了絕熱段的熱響應時間及溫度曲線走勢。由熱阻實驗可以知道拉伸次數對於可撓式熱管有相當程度的影響，拉伸次數的增加相對造成熱量傳遞上的困難，進而導致熱阻的上升及最大熱傳量的下降。

關鍵字

可撓式熱管 ； 熱阻 ； 熱響應 ； 拉伸次數 ； 彎曲角度

並列摘要

This study carried out thermal response experiment and thermal resistance experiment after tensile experiment for flexible heat pipe, and studied and discussed the variation of its performance. The material of the evaporator section and condenser section of the flexible heat pipe studied in this experiment was copper, the material of adiabatic section was stainless steel, the internal capillary structure was metal mesh, and pure water was used as work fluid. The evaporator section, adiabatic section and condenser section were connected to thermocouple wire to measure the temperature change, and to discuss the thermal response rate, equilibrium time and thermal resistance. The experimental results showed that the change in bend angle can influenced the overall thermal response time and temperature difference. However, the effect of bend angle on the evaporator section and condenser section declined as the drawing number increased, but the thermal response time and temperature curve trend of adiabatic section were influenced obviously. According to the thermal resistance experiment, the drawing number influenced the flexible heat pipe to a great extent, the increase in drawing number made the heat transfer more difficult relatively, so that the thermal resistance increased and the maximum heat transfer rate decreased.

並列關鍵字

flexible heat pipe ； thermal resistance ； thermal response ； drawing number ； bend angle

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