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흡착식 냉방 시스템을 이용한 수소개질/연료전지 시스템의 효율향상
무자히드 나심,김철민,이상용 한국수소및신에너지학회 2019 한국수소 및 신에너지학회논문집 Vol.30 No.5
An adsorption chiller is connected to the fuel processing/fuel cell system to increase the energy efficiency of the system. Since, the minimum temperature of 70°C is needed to operate the adsorption chiller, HT-PEMFC is used as a heating source and 80°C hot water in the water tank at the system is supplied to the chiller. Experimentally measured COP of the adsorption chiller was between 0.4-0.5 and the total calcuated efficiency of the connected system was between 60% and 70% comparing to 47% without adsorption chilling system.
이수용,잡반티엔,무자히드 나심,김종환,이영덕 한국수소및신에너지학회 2023 한국수소 및 신에너지학회논문집 Vol.34 No.3
Hydrogen production can be classified based on the energy source, primary reactor type, and whether or not it emits carbon dioxide. Utilizing color representation proves to be an effective means of expressing these distinctive characteristics. Among the various clean hydrogen production techniques, there has been a growing interest in turquoise hydrogen production, which involves the decomposition of methane or other fossil fuels. This method offers advantages in terms of large-scale production and cost reduction through the sale of solid- carbon byproduct. In this study, an extensive literature review was conducted to select and analyze several promising candidates for turquoise hydrogen production processes. The efficiency and economics of these processes were evaluated using stream data reported in the literature sources. The findings indicate that the levelized cost of hydrogen production (LCOH) is significantly influenced by the sales of byproducts, specifically the solid-carbon and carbon monoxide byproducts.