基于SOFC/GT和掺氢天然气的综合能源系统性能研究及经济性分析

Performance Study and Economic Analysis of Integrated Energy Systems Based on SOFC/GT and Hydrogen-blended Natural Gas

提出了一种以固体氧化物燃料电池(SOFC)/燃气轮机(GT)为原动机,以掺氢天然气为燃料的综合能源系统。建立了风光发电和制氢设备、SOFC/GT系统、冷热电能源转换和存储设备、碳捕集设备等多种类型能源利用设备的数学模型,在考虑多种负荷平衡约束、设备运行约束和“双碳”目标约束的情况下研究了综合能源系统的性能与经济性。结果表明:随着燃料掺氢比的增加,SOFC/GT系统发电效率从60.36%增加到64.79%,综合能源利用率从87.80%增加到90.80%;系统使用可再生能源制氢时,碳排放量最低,尽管考虑了碳交易收益,但高昂的制氢成本导致系统运行成本最高。

An integrated energy system using solid oxide fuel cell(SOFC)/gas turbine(GT)as power generation device and hydrogen-doped natural gas as the fuel was proposed.The mathematical models of various types of energy utilization equipment,such as wind power generation,solar power generation,hydrogen production equipment,SOFC/GT system,energy conversion and storage equipment for electricity,heat,and cooling,carbon capture equipment,etc,were established.The performance and economy of the integrated energy system were studied considering various load balance constraints,equipment operation constraints and aiding in achieving the"dual carbon"targets.Results show that the power generation efficiency of SOFC/GT system increases from 60.36%to 64.79%,and the comprehensive energy utilization rate increases from 87.80%to 90.80%with the increase of fuel hydrogen blending ratio.When the system used renewable energy sources to produce hydrogen,the carbon emissions are the lowest,although carbon trading gains are considered,the high cost of hydrogen production leads to the highest operating costs.