Research On Coupling Scheme And Thermodynamic Characteristics Of Integrated Biomass Hydrogen Production And Solid Oxide Fuel Cell System

At present,the price of fossil energy such as crude oil and coal in the world is rising rapidly.The high price and the environmental pressure brought by primary energy have affected the development of my country’s economy and energy technology.Biomass energy belongs to clean energy and has a wide range of sources.It is a scientific choice for the transformation and development of energy structure.Biomass energy reserves in my country are abundant and easy to obtain.The biomass hydrogen production technology derived from this also has broad application prospects.The promotion of biomass energy is conducive to solving the problem of energy sources for residents in remote areas of northwest my country,but biomass gas production is easily affected by environmental temperature and fluctuates.Therefore,measures need to be taken to maintain the temperature of the biomass gas production process,and at the same time to seek suitable way of use.Solid oxide fuel cells(SOFCs)can efficiently utilize biomass gas and have good fuel adaptability.As a power generation device,there are abundant application scenarios.The effects of parameters including wind speed,solar irradiance,H2O/CH4 ratio at the reformer inlet,reformer operating temperature,and SOFC current density on the thermal characteristics of the system are analyzed.By analyzing the exergy efficiency of each component of the system,find the component with larger energy loss.Combined with advanced exergy analysis,a new coupling scheme is designed for the system.Compared with the original scheme,the total exergy loss of the system can be reduced by 18.64 k W.The genetic algorithm was used to optimize the key parameters affecting the efficiency of the circulation system,and the circulation efficiency of the system was increased by 4.28%.The results of economic analysis show that the estimated cost recovery period of the system is 5.19 years,and the return on capital is 19.29%.According to the environmental analysis,the CO2 emission per unit power of the system is 0.113t/GJ.Using exo-economic analysis as a tool,considering component procurement cost and maintenance cost,the exo-economic performance of each energy flow of the system is evaluated.Combined with the exergy economic factors of each component,the assessment needs to increase the capital investment of anaerobic digester and heat storage system.