矩形熱虹吸管迴路的原理主要是因為蒸發端和冷凝端之盤管外側的溫度不同，導致管內流體密度的變化，加上重力場作用可以使管內冷媒流體循環流動，在設計上中多半用於大型的熱交換裝置，如：大樓冰水系統或太陽能集熱系統。本文主旨主要在討論矩形熱虹吸管迴路的熱流分析，模擬矩形熱虹吸管迴路蒸發端與冷凝端的熱傳方式，在蒸發端計算中考慮加熱、兩相熱傳與過熱蒸汽的熱流現象；相同地在冷凝端也加入反過熱蒸汽、冷凝與過冷液態的計算，並且運用熱交換器的計算模式套用至熱虹吸管迴路，分析空氣在蒸發端與冷凝端進風與出風的狀態。
依據模擬結果的顯示，空氣經由矩形熱虹吸管迴路的確有降溫與升溫的效果，若改變相關熱虹吸管迴路的參數可以得到不同降溫與升溫變化，且在熱虹吸管迴路蒸發端中亦有除濕的效果，將這些空氣的出風參數帶入另一個空調系統模擬，討論矩形熱虹吸管迴路是否可以輔助空調系統，達到省能的功效。
故在程式的撰寫上主要分成三個大系統，第一個即是模擬矩形熱虹吸管迴路熱流特性，第二個是空調冷氣模擬系統，第三個則是熱虹吸管迴路及空調系統的組合系統分析，本文即是討論最終熱虹吸管迴路輔助空調系統模擬分析，模擬空氣進出風的熱傳現象、各點出風空氣狀態，比較熱虹吸管迴路空調系統的優缺點。

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