Techno-economic assessment of decentralized low-carbon power plants based on solid oxide fuel cell equipped with calcium looping carbon capture

IF 9 1区工程技术 Q1 ENERGY & FUELS

Energy Pub Date : 2024-11-05 DOI:10.1016/j.energy.2024.133720

Sajjad Arefdehghani , Alireza Rostamzadeh Khosroshahi , Navid Kousheshi , Ali Saberi Mehr , Hossein Nami

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Abstract

Integrating solid oxide fuel cells (SOFCs) with carbon capture technologies aligns with the intention to decarbonize the electricity sector. This study explores two configurations of SOFCs combined with calcium looping (CaL) carbon capture technology (SOFC/CaL): one with auxiliary heaters and another with additional fuel to supply the energy required for the carbon capture process. Results indicate that the electrical efficiency of the SOFC/CaL system is approximately 26 % lower than that of a standalone SOFC, though the overall efficiency (considering both electricity and heat as products) remains comparable. However, CO₂ emission is 314.7 kg/MWh for standalone SOFC, 125.8 kg/MWh for SOFC/CaL equipped with auxiliary heaters, and 22.4 kg/MWh for SOFC/CaL retrofitted with additional fuel. The scale of the SOFC and the fuel price significantly affect the carbon capture economy and the required CO₂ tax for cost parity. For a 10 MW plant with a fuel cost of 10 USD/GJ, the levelized cost of electricity is estimated at 66.7 USD/MWh for the standalone SOFC and 82.5 USD/MWh for the SOFC/CaL. A CO₂ tax of 39–53 USD/tCO₂ is necessary to achieve cost parity.

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基于配备钙循环碳捕集的固体氧化物燃料电池的分散式低碳发电厂的技术经济评估

将固体氧化物燃料电池（SOFC）与碳捕集技术相结合符合电力行业去碳化的意图。本研究探讨了 SOFC 与钙循环（CaL）碳捕集技术（SOFC/CaL）相结合的两种配置：一种是辅助加热器，另一种是额外燃料，以提供碳捕集过程所需的能量。结果表明，SOFC/CaL 系统的电能效率比独立 SOFC 低约 26%，但总体效率（将电能和热能都视为产品）仍然相当。然而，独立 SOFC 的二氧化碳排放量为 314.7 千克/兆瓦时，配备辅助加热器的 SOFC/CaL 为 125.8 千克/兆瓦时，加装额外燃料的 SOFC/CaL 为 22.4 千克/兆瓦时。SOFC 的规模和燃料价格对碳捕集经济性和实现成本平价所需的二氧化碳税有很大影响。对于燃料成本为 10 美元/千焦的 10 兆瓦电厂，独立 SOFC 的平准化电力成本估计为 66.7 美元/兆瓦时，SOFC/CaL 为 82.5 美元/兆瓦时。要实现成本均等，必须征收 39-53 美元/吨 CO2 的二氧化碳税。

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来源期刊

Energy 工程技术-能源与燃料

CiteScore

15.30

自引率

14.40%

发文量

审稿时长

14.2 weeks

期刊介绍： Energy is a multidisciplinary, international journal that publishes research and analysis in the field of energy engineering. Our aim is to become a leading peer-reviewed platform and a trusted source of information for energy-related topics. The journal covers a range of areas including mechanical engineering, thermal sciences, and energy analysis. We are particularly interested in research on energy modelling, prediction, integrated energy systems, planning, and management. Additionally, we welcome papers on energy conservation, efficiency, biomass and bioenergy, renewable energy, electricity supply and demand, energy storage, buildings, and economic and policy issues. These topics should align with our broader multidisciplinary focus.