为提升能源利用效率并减少碳排放,提出了一种基于燃气电站的氢、热、电联产的混合动力系统。通过热力学分析和经济性分析对系统进行评估,研究结果显示该系统的能量效率和 GFDA3 效率分别可达到74.60%和64.47%,高于现有研究中的燃料电池-燃气轮机系统。各子系统中燃料电池对混合动力系统总能量输出功率的贡献最大(88.59%), GFDA3 损失也最大,占总 GFDA3 损失的51.74%,电解水与压缩空气储能系统的相对 GFDA3 损失较小。压缩空气储能控制机组调峰范围在85%~115%,设计工况下电解水单元的产氢速率为0.41 kmol/h,双储能系统的配置增强了机组的调峰能力。此外,该系统具有0.08~0.10 t/GJ的低碳排放,表明对环境影响较小。考虑贴现率等因素,该项目的投资成本在3.66 a内可以收回(含建设周期1 a),计算得净现值为110.690万美元。因此,拟提议方案在经济性方面也表现出一定的优势。

To enhance energy utilization efficiency and reduce carbon dioxide emission,a hybrid power system based on hydrogen,heat,and electricity co-generation in a gas plant is proposed.Through thermodynamic and economic analysis on the system,it is revealed that the energy efficiency and exergy efficiency can reach 74.60% and 64.47%,respectively,both higher than the fuel cell-gas turbine system under research and development.Among various subsystems,the fuel cell contributes the most to the total energy output power (88.59%),yet also incurs the highest exergy loss,accounting for 51.74%.However,the relative exergy losses of the water electrolysis and compressed air energy storage subsystems are comparatively lower.The compressed air energy storage unit's control range for peak shaving spans from 85% to 115%,and the electrolysis unit produces hydrogen at a rate of 0.41 kmol·h^-1,enhancing the system's peak shaving capacity.Moreover,the proposed system demonstrates low carbon dioxide emission of 0.08 to 0.10 t·GJ^-1,indicating minimal environmental impact.Considering discount rates and other factors,the investment cost of this project can be recovered within 3.66 years (including a 1-year construction period),with a net present value of 1.107 million U.S.dollars.Therefore,this proposed approach also exhibits a certain economic advantage.

于志勇(1988-),男,硕士,工程师,研究方向为动力工程,52829730@qq.com;陈衡(1989-),男,博士,副教授,研究方向为动力工程及工程热物理、储能调峰优化,通讯联系人,heng@ncepu.edu.cn。