隨著社會不斷的進步，能源需求呈現指數成長，再加上環保意識的抬頭，人們開始重視“節能”的功能環節，提高效率是解決能源危機的方法之一。因此，近年來熱傳強化技術被廣泛應用於石油、化工、冶金、材料等工程領域，尤其在航空、電子器材及核能安全等領域應用更為廣泛。所以發展高效熱交換器具有龐大的經濟效益與商機。這也是本文研究重點。
本文探討一款雙套管逆流熱交換器，內管為熱流之橢圓波形，外管為冷流之圓形絕熱管，冷熱流體之間藉由內壁傳遞熱能，當固定外管冷流體雷諾數(Re=10000)，可藉由控制內部熱流體雷諾數(10000 Re 60000)，來模擬流場，以估算紐塞數與摩擦因子，並藉由 (綜合性能指標)來判斷熱傳強化之效率。
透過場協同理論與積耗散原理所推導出的速度場協同方程式做管內流場優化之模擬，發現在管內截面上產生渦流能使管壁面處的溫度梯度增加，使得熱傳量提升。因此，我們目標將流場中施以體積力，促使流場與溫度場混和，達到熱傳效率提升之結果。
從數值模擬結果得知紐塞數隨著雷諾數增加而成長，但與傳統圓管之比值卻會隨雷諾數增加而減少趨於某一定值， 的趨勢與紐塞數比值相同且 1，說明此熱強化管的表現很好。且強化管的場協同角比起圓管來小，解釋了強化管紐塞數比圓管高的現象。觀察管內流場，比起圓管，強化管內縱向流動旺盛，截面上出現六~八個渦流，破壞了溫度邊界層，說明擾動增加了熱傳效益。

With the depletion of global resources, we must find the way of energy saving. This article focus on heat exchanger's heat transfer effectiveness. This article uses "FLUENT" for analysis, this software has great ability on handling wide range of common flow simulation with finite element method.
In order to achieve the lifting of heat transfer, we refer to Field Synergy Principle and Entransy Dissipation Theory. Knowing that produce 6~8 vortexs near wall is the best way to enhance heat transfer. Therefore, we construct an elliptic-waved-shaped(EWS) heat exchanger to reach our goal. Except for EWS heat exchanger, there are circular、elliptical and circle-waved inner pipes to compare.
To prove the adventage of EWS heat exchanger, we observe four kinds of heat exchanger by Nusselt number、friction number and performance factor. Performance factor is a term applied to judge whether this kind of heat exchanger is efficient or not. When we lift the heat transfer, we need to consider pump power consumption. If pump power consumption's rate of increase is greater than heat transfer's rate of increase, this heat exchanger is not efficient.

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