制氢与掺混一体化系统全生命周期碳足迹评价与技术经济性评估

Life-cycle Carbon Footprint Assessment and Techno-Economic Analysis of Hydrogen Production and Blending Integrated System

通过构建制氢与掺混一体化系统仿真模型,建立多能流、物料流数据的全生命周期清单,定量评价其技术经济与降碳潜力。基于平准化掺氢天然气成本和净现值分析模型,探讨能量效率、电流密度等关键技术参数及风电价格、原材料价格等经济参数对经济评价指标的影响,并进行技术经济性评估;基于全生命周期碳足迹评价模型,分析系统的降碳潜力。研究表明:原材料价格和电价是影响平准化成本的主要因素,风电交易电价平均每下降0.10元/(kW·h),平准化成本可下降149元/t;年产1.57万t绿色氢气和50.28万t天然气掺混的新改扩建项目净碳排放量为27816 t,与所掺氢气等热值的天然气总CO_(2)排放量为1334175 t/a。故此项目在经济技术和环境友好方面是可行的。

By developing a simulation model of hydrogen production and blending integrated system,the life cycle inventory of multi-energy flow and material flow data was established to quantitatively evaluate technical economy and carbon reduction potential of the integrated system.Based on models of levelized cost and net present value of hydrogen-doped natural gas,influences of important technical parameters including energy efficiency and current density,and economic factors including wind power prices and raw material costs,on the economic evaluation index were analyzed.The tech-economic feasibility of the integrated system was evaluated.Furthermore,a whole life cycle carbon footprint evaluation model was employed to assess the carbon reduction potential.The study shows that the prices of raw materials and electricity are the primary factors influencing the levelized cost.A decrease of 0.10 yuan/(kW·h)in wind power transaction price can result in a reduction of 149 yuan/t in the levelized cost.The proposed new reconstruction and expansion project with an annual output of 15700 t of green hydrogen and 502800 t of natural gas yields a net carbon emission of 27816 t,while the total CO_(2) emission from natural gas amounts to 1334175 t per year,considering its calorific value as hydrogen.The project is feasible in economic technology and environmental friendliness.