近年來氣候異常，能源浩劫，綠色能源蓬勃發展，因此太陽能熱水器佔有舉足輕重的地位。但太陽能熱水器採取直接加熱水的方式，卻有一些技術上問題，如：腐蝕、冷凍、結垢、高熱損失等等。因此目前太陽能熱水器逐漸朝向非直接熱交換式。由於雙相熱虹吸管屬於高效率熱傳工具，因此本論文中探討雙相熱紅吸管的應用。
雙相封閉式熱虹吸環路(TPCLT)是一個高效率的雙相移熱工具，其系統包含蒸發部、冷凝部、蒸氣頭、蒸氣線、液體頭以及液體線，移熱的方式主要是利用工作液體的相變化將熱能由蒸發部移至冷凝部，此裝置為自然且單向循環並不需要而外的動力裝置，並具有將熱量長距離傳輸的能力，所以十分有利於應用在太陽能熱水與建築物一體化。
本篇論文主要是研究TPCLT環路系統在太陽能熱水器的應用，實驗中直接把環路放置在太陽底下，依照環路設定不同填充量測試。大型TPCLT環路實驗結果顯示此系統填充量為50%時，使用5mm薄鋁板，轉換效率為65%，水槽溫度達到42度。
關鍵字：雙相封閉式熱虹吸環路、太陽能熱水器

A two-phase closed loop thermosyphon (TPCLT) is a high-efficiency two-phase heat transfer device, which is composed of evaporator, condenser, vapor head, vapor line, liquid head and liquid line. The basic concept is the phase change of a working fluid is used to transport heat from evaporator to condenser through natural circulation without any external driving forces. The device is capable to transport heat for a long distance, so it is proper to apply on the building integrated solar thermal systems.
This study presents the possibility of the TPCLT apply on the solar thermal storage system. This experiment put TPCLT under sunshine with different filling ratio. The efficiency is 65% in filling ratio 50% with painting 3mm thin alumi plate. .
Keywords : Two-phase closed loop thermosyphon、Solar thermal collectors

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