本研究分析平板式熱管（FHP）熱傳特性，以實驗、模擬及因次分析作一整合性的探討。實驗部份以不同瓦數加熱下，觀察FHP的溫度變化，以及計算出其相對熱阻值，以便進行不同瓦數下FHP的性能比較。模擬的部份則是先以模擬溫度和實驗進行比較，再探討最大輸入功率下的內部速度與壓力場現象，最後以因次分析比較本文與文獻之壓降及熱傳現象，再進行FHP之最佳工作點預測。
實驗結果顯示本文所使用之FHP熱阻範圍落在1.96~0.3℃/W，即FHP效能達穩定時熱阻幾乎維持0.3℃/W不變。以模擬結果看來，其在40W就已達到熱阻為0.3℃/W的狀態，較實驗為45W來的快，模擬和實驗的差異約在3%~16%。FHP在輸入瓦數55W的情況下，內部蒸氣最大速度為0.025m/s，蒸氣壓降約325pa；液體最大速度為0.0025m/s，液體壓降約為83pa。本文以 及 函數比較文獻與本文蒸氣壓降與熱傳結果，顯示文獻之FHP應尚未發揮其效能，兩函數持平後之座標為 ，估計此點為本研究之FHP最佳工作點。

To analyze the heat transfer characteristics of a flat heat pipe (FHP) is the purpose of this study.

First, in order to compare the performance of the FHP at different input watts, we observe the trends of temperature distributions of the FHP, and calculate the corresponding thermal resistance. For the simulation, we make a comparison with experiment results about the temperature field, and then discuss the physical phenomena about the velocity and pressure field at the maximum performance condition. Finally, we compare the dimensional analysis results between this study and others, and indicate the best working point of the FHP.

The experimental results show that the range of the FHP thermal resistance is between 1.96~0.3℃/W, and the thermal resistance is almost constant 0.3℃/W after 45W. The difference between simulations and experiments is around 3%~16%.

About the velocity and pressure fields inside the FHP: the maximum velocity of vapor is 0.025m/s, pressure drop of vapor is 325pa; the maximum velocity of liquid is 0.0025m/s, pressure drop of liquid is 83pa. Using the function and to compare this study and others, we can find the FHP of the reference is at the starting point. The two function, F and G, will level off at , the point is also forecasted as the best working point.

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