Techno-Economic Analysis of Green Hydrogen Production System Based on Renewable Energy Sources

Abstract

>> Worldwide, there is a significant surge in the efforts for addressing the issue of global warming; the use of renewable energy is one of the solutions proposed to mitigate global warming. However, severe volatility is a critical disadvantage , and thus, power-togas technology is considered one of best solutions for energy storage. Hydrogen is a popular candidate from the perspective of both environment and economics. Accordingly, a hydrogen production system based on renewable energy sources is developed, and the economics of the system are assessed. The result of the base case shows that the unit cost of hydrogen production would be 6,415 won/kg H2, with a hydrogen production plant based on a 100 MW akaline electrolyzer and 25% operation rate, considering renewable energy sources with no electricity cost payment. Sensitivity study results show that the range of hydrogen unit cost efficiency can be 2,293 to 6,984 Won/kg H2, depending on the efficiency and unit cost of the electrolyzer. In case of electrolyzer operation rate and electricity unit cost, sensitivity study results show that hydrogen unit cost is in the range 934-26,180 won/kg H2. 1. 서 론 지구 온난화의 주범으로 손꼽히는 온실가스 감축 노력의 일환으로 전 세계는 재생에너지의 비중을 점 차적으로 높이고 있다. 유럽의 경우 재생에너지 로드 맵 21 1) 에 따르면 2020년까지 전체 에너지에서 재생 에너지가 차지하는 비중을 20%까지 늘리는 것으로 제시되었으며, 대한민국 정부 또한 3020 재생에너지 정책을 통하여 2030년까지 신재생에너지의 비중을 20% 이상으로 증가시키는 계획을 발표한 바 있다.