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인산형 연료전지(PAFC)기반 복합에너지 허브 시스템 해석
정윤주(Yoonju Jung),박천기(Chungi Park),주현철(Hyunchul Ju) 대한기계학회 2020 대한기계학회 춘추학술대회 Vol.2020 No.12
Natural gas (NG) is delivered to homes and businesses through a complex pipeline network consisting of a numerous low-pressure local distribution lines from a high-pressure main supply line. Now, the decompression energy is lost, and research on replacing the throttle valve with turbo expander generators(TEGs) to convert loss into additional power is being conducted. In this study, a multi-energy hub system composed of a phosphoric acid fuel cell (PAFC) and TEG module was analyzed through ASPEN-HYSYS® modeling and simulation, and the core concept is the efficiency of the entire system. The goal is analyzing overall system that can produce about 1.73 MWe of power in TEG module. However, in hydrogen production mode, an additional heat source is required to fully transfer and operate the expansion work generated by the NG flow in the TEG system to the PAFC stack. This study explains the advantages of the proposed multi-energy hub system in terms of thermal integration and overall efficiency but shows that the system configuration and operation must be optimized to further advance the technology.