整体煤气化燃料电池发电系统构建及模拟优化研究

Research on System Construction and Simulation Optimization of Integrated Gasification Fuel Cell

整体煤气化燃料电池(integrated gasification fuel cell,IGFC)发电技术是一种清洁、高效、绿色的煤基发电技术,可以与CO_(2)捕集技术高效结合,实现CO_(2)近零排放。为实现对IGFC系统的高效模拟与计算分析,基于利用固体氧化物燃料电池(solid oxide fuel cell,SOFC)的百MW级IGFC系统流程,在Aspen Plus软件上建立模拟仿真模型。以操作温度800℃、操作压力1.5MPa、燃料利用率80%、阴极空气循环比例0.5、阴极空气利用率12.5%为燃料电池单元的典型操作条件进行模拟,实现了46.24%的系统净发电效率,并对系统中各单元的出力、耗能情况进行分析。进一步,针对阴极空气循环比例、燃料利用率、燃料电池操作温度、阴极空气利用率等关键控制参数进行敏感性分析,研究其对系统效率和系统各单元出力、耗能的影响作用规律。结果可为进一步提高IGFC系统性能提供指导建议。

Integrated gasification fuel cell(IGFC)technology is a kind of clean, efficient and green coal-based power generation technology, which can effectively achieve nearly zero CO_(2)emissions in combination with the CO_(2)capture technology. To complete the efficient simulated calculation and analysis of the IGFC system, this paper built a simulation model by using Aspen Plus software for the 100MW IGFC system flow of the solid oxide fuel cell(SOFC). Based on the model, the IGFC system with nearly zero CO_(2)emissions was simulated in accordance with typical operating conditions of fuel cells, such as the operating temperature of 800℃, the operating pressure of 1.5MPa, the fuel utilization of 80%, the cathode air circulation ratio of 0.5, and the cathode air utilization rate of 12.5%. The net power generation efficiency of 46.24% was achieved, and the output and energy consumption of each unit in the system were analyzed.Furthermore, in terms of key control parameters, including cathode air circulation ratio, fuel utilization, fuel cell operating temperature and cathode air utilization rate, the paper researched and analyzed their influence rules on the system efficiency and output and energy consumption of each unit of the system. The results can provide suggestions for improving the performance of the IGFC system.