面對能源需求與CO2排放增加，蒸餾因高能耗成為節能減碳的重要目標。本研究導入熱泵輔助蒸餾 (heat pump-assisted distillation, HPAD)，期望藉由回收並再利用製程內部低溫廢熱，降低傳統蒸餾塔對外部能源之需求。研究中以甲醇/水與丙烯/丙烷兩雙成分分離系統為案例，分別代表高沸點差距與低沸點差距之分離情境，利用Aspen Plus建立傳統蒸餾塔Base case，並在相同產品規格下，以機械蒸氣再壓縮 (mechanical vapor recompression, MVR)、自熱回收技術 (self heat recuperation technology, SHRT)、塔底閃蒸 (bottom flashing, BF) 與閉循環蒸氣壓縮(closed-cycle vapor compression, VC) 等熱泵輔助蒸餾 (heat pump-assisted distillation, HPAD) 架構，進一步比較其能量、可用能、經濟與碳排放之效能。模擬結果顯示，兩種分離系統導入HPAD後皆能有效降低傳統蒸餾塔之能源需求，其中甲醇/水系統各HPAD架構之COP皆大於3.4，節能效率均高於71 %；丙烯/丙烷系統之COP皆大於4.1，節能效率均高於75 %，整體能耗表現優於甲醇/水系統。可用能分析結果顯示，因製程物流能量品質差異，甲醇/水系統之HPAD架構可用能效率均高於傳統蒸餾塔，而丙烯/丙烷系統則僅VC架構呈現較佳可用能效率。經濟分析方面，各案例皆具有一定經濟回收能力，回收年限均小於9.1年，部分條件下可低至0.6年。碳排放分析結果亦顯示，兩系統導入熱泵後，碳排放量皆明顯降低，整體碳減量均高於75 %；其中甲醇/水系統以SHRT架構之碳減量較佳，丙烯/丙烷系統則以VC架構具有較高減碳效益。綜合而言，HPAD有效降低傳統蒸餾製程之能源消耗與碳排放，並在部分架構下提升可用能效率與展現經濟可行性。

With increasing global energy demand, distillation has become a major target for energy conservation and decarbonization because of its high energy consumption and widespread industrial use. Heat pump-assisted distillation (HPAD) has attracted considerable attention because it upgrades low-grade waste heat for reuse within the distillation column, thereby reducing energy consumption. This study evaluates HPAD performance using methanol/water and propylene/propane as representative separation systems with large and small boiling-point differences, respectively. Conventional distillation columns were established as base cases in Aspen Plus v14. Under identical product specifications, four HPAD configurations were systematically compared: mechanical vapor recompression (MVR), self-heat recuperation technology (SHRT), bottom flashing (BF), and closed-cycle vapor compression (VC). Performance was evaluated in terms of energy, exergy, economics, and carbon emissions. HPAD reduced energy consumption and CO2 emissions in both systems. For methanol/water, all configurations achieved coefficients of performance (COPs) above 3.4 and energy-saving efficiencies above 71 %. For propylene/propane, COPs exceeded 4.1 and energy-saving efficiencies exceeded 75 %. All configurations improved exergy efficiency for methanol/water, whereas only VC improved it for propylene/propane. All cases were economically feasible, with payback periods below 9.1 years, and reduced carbon emissions by more than 75 %. Overall, SHRT performed best for methanol/water, whereas VC was the most favorable configuration for propylene/propane.

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