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100 MW급 Power-to-Gas 시스템의 사전 경제성 분석
고아름(Areum Ko),박성호(Sung-Ho Park),김수현(Suhyun Kim) 한국청정기술학회 2020 청정기술 Vol.26 No.1
재생에너지 3020 이행계획에 따라 재생에너지 발전 비중 증가에 대비해 잉여전력 저장 및 전력 공급 안정화 기술 필요성이 대두되고 있다. 이를 위해 수요 공급의 불균형으로 활용할 수 없는 전력을 수소 또는 메탄으로 전환하여 저장하는 Power-to-Gas 기술 개발이 활발히 진행되고 있다. 본 연구에서는 국내 실정을 반영한 Power-to-Gas 경제성분석을 수행하였다. 균등화 수소원가를 산정하기 위하여 Total revenue requirement 방법론을 활용하여 경제성 분석 방법론을 재정립하고, 국제에너지기구의 경제성 분석 결과를 통해 검증하였다. 연구결과 국내 기준 100 MW급 Power-to-Gas 시스템 균등화 수소원가는 kg당 8,344원으로 나타났다. 전기 비용, 수전해 장비 비용, 작동 연한에 따른 민감도 분석이 수행되었고, 재생에너지 이용 수소 생산비용과 천연가스 개질 수소 생산비용을 비교하여 경제성을 확보할 수 있는 조건을 제시하였다. According to the Korean Renewable Energy 3020 Implementation Plan, the installation capacity of renewable energy is expected to increase whereas technology for storing excess electricity and stabilizing the power supply of renewable energy sources is extremely required. Power-to-Gas is one of energy storage technologies where electricity is converted into gas fuel such as hydrogen and methane. Basically, Power-to-Gas system could be effectively utilized to store excess electricity generated by an imbalance between supply and demand. In this study, the economic feasibility analysis of Power-to-Gas reflecting the domestic situation was carried out. Total revenue requirement method was utilized to estimate the levelized cost of hydrogen. Validation on the economic analysis method in this study was conducted by comparison of the result, which is published by the International Energy Agency. The levelized cost of hydrogen of a 100-MW Power-to-Gas system reflecting the current economic status in Korea is 8,344 won kg<SUP>-1</SUP>. The sensitivity analysis was carried out, applying the main analysis economic factors such as electricity cost, electrolyser cost, and operating year. Based on the sensitivity analysis, the conditions for economic feasibility were suggested by comparing the cost of producing hydrogen using renewable energy with the cost of producing natural gas reformed hydrogen with carbon capture and storage.
고아름(Areum Ko),박성호(Sungho Park),김준영(Joon-Young Kim),차재민(Jae-Min Cha) 대한기계학회 2018 대한기계학회 춘추학술대회 Vol.2018 No.12
The objective of this study is to develop the economical analysis module optimized for power generation from industrial waste heat recovery. A module to calculate LCOE is developed by applying TRR methods. The reliability of developed module is verifiefd against NETL economic analysis results. As a result of the verification, the error rate is about 6 ~ 7%, which satisfied the accuracy for business feasibility evaluation. In order to improve the reliability, the module was improved by applying the levelization method used by NETL. As a result of the verification of reliability, the error rate is less than 1% and the accuracy is improved.
고아름(Areum Ko),박성호(Sung-Ho Park),류주열(Ju-Yeol Ryu),박종포(Jong-Po Park) 한국신재생에너지학회 2020 신재생에너지 Vol.16 No.1
Liquid air energy storage (LAES) using gas liquefaction has attracted considerable attention because of its mature technology, high energy density, few geographical constraints, and long life span. On the other hand, LAES has not yet been commercialized and is being developed recently. Therefore, few studies have performed an economic analysis of LAES. In this study, the levelized cost of electricity was calculated and compared with that of other energy storage systems. As a result, the levelized cost of electricity of LAES was $371/㎿h. This is approximately $292/㎿h, $159/㎿h, $118/㎿h, and $3/㎿h less than that of the LiCd battery, VRFB battery, Lead-acid battery, and NaS battery. In addition, the cost was approximately $62/MWh and $195/㎿h more than that of Fe-Cr flow battery and PHS. Sensitivity analysis of the levelized cost of electricity according to the main economic factors was performed, and economic uncertainty analysis was performed through a Monte-Carlo simulation. The cumulative probability curve showed the levelized cost of electricity of LAES, reflecting price fluctuations in the air compressor cost, electricity cost, and standing reserve hourly fee.