加氫轉化替代航空燃油(HRJ)是如今一種可以減少溫室氣體排放的方法，為了使HRJ與傳統石化航空燃料競爭，必須提高其能源利用率並減少其能耗，隨之可以降低HRJ工廠商業化的成本。在這項研究中，首先使用可用能分析來指出目前系統內的有效能量，再透過狹點分析進行換熱網優化，以達到有效的再循環熱流並優化熱集成，結果表明可以達到86.29％的效率。同時，還進行了經濟分析以評估投資的可行性，其中包括了使用蒙地卡羅模擬進行不確定性分析。結果表明，如果以主要產品（HRJ）為利潤目標，日處理量超過300噸與600噸的工廠獲利機率分別為57.43％、72.41％，代表大規模生產的投資獲利是穩定的。最後，在HRJ供應鏈中計算碳排放，並且與廢食用油直接焚燒相比。結果顯示將廢食用油轉換成替代燃油之碳排與直接焚燒相比會減少17.88噸，雖然目前市場上的替代能源產品還不普及，但綜合本研究各項分析能夠了解透過能源優化及經濟與環境評估，可以使HRJ更具競爭力。

The application of renewable jet fuel is an eco-friendly technique that can reduce greenhouse gas emissions. To make hydro-processed renewable jet fuel (HJR) be competitive with petrochemical aviation fuel, it is necessary to improve their energy utilization and reduce their energy dissipation. This can reduce the energy cost for a commercial plant of hydro-processes renewable jet fuel. In this study, an exergy and a pinch analyses are performed to demonstrate the actual recycling heat flow and optimize heat integration, and optimize heat integration. The results show that the system can attain 86.29% efficiency saving. In addition, an economic analysis is conducted to evaluate the investment feasibility, which is considered by an uncertainty analysis. The results show that if the main product (HRJ) is the target revenue, it can be sold at $ 0.49~0.63 per liter. For plant capacities over 300 tons a profit probability of 57.43~72.41% is estimated. Finally, the carbon emission is calculated for the HRJ supply chain and compared to UCO direct incineration, which was 17.88 tons less than it. Although alternative fuel products are not widely available on the market, the analysis of this study guides the reader through comprehensive energy optimization as well as economic and environmental assessment, which pave the way for a more competitive HRJ production.

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