Life Cycle Assessment And Scenario Simulation Research Of Hydrogen Fuel Cell Heavy Commercial Vehicles

Hydrogen fuel cell heavy duty commercial vehicles(FCHCV)are one of the ideal solutions to the problems of energy security and greenhouse effect.However,based on the current situation of Chinese automobile industry,life cycle energy consumption and emissions of FCHCV under key parameters scenario simulation are not clear.Meanwhile,how to quantitatively predict the energy saving and emission reduction potential of FCHCV compared with diesel heavy commercial vehicles(DHCV)under the key parameters progress is an urgent demand faced by Chinese automobile industry.Therefore,it is essential for the large-scale promotion of FCHCV in the future to quantify life-cycle energy consumption and emissions results of FCHCV and DHCV,and to evaluate the energy saving and emission reduction potential of FCHCV by using life cycle assessment(LCA)method.In this paper,LCA is used to establish the material,energy,emissions,and cost evaluation model for life cycle FCHCV,and the life cycle inventories of FCHCV are analyzed to obtain life cycle energy consumption and emissions results of FCHCV.A FCHCV of Shaanxi Automobile is taken as the evaluation object,the system boundary and functional units are determined,and the life cycle FCHCV data of material flow,energy flow and emission flow were analyzed.During the operation and use of FCHCV,hydrogen production from coal gasification,steam methane reforming,water electrolysis in Chinese hybrid grid,and photovoltaic electrolytic water are analyzed emphatically.It is found that the energy consumption and carbon emissions of FCHCV based on photovoltaic electrolytic water are60.90% and 87.70% lower than those of Chinese hybrid grid electrolytic water,respectively.Secondly,the effects of fuel cell degradation,typical regional power structure and hydrogen paths on the material,energy consumption and emissions evaluation of FCHCV are quantified.It is found that when the use of hydrogen increases by 13.90% in the fuel cell degradation scenario simulation,energy consumption and carbon emission of FCHCV in its life cycle increase by 1.26E+06 MJ and 2.66E+04 kg respectively based on photovoltaic electrolytic water.The differences in the electricity structure of Beijing,Shanghai,Guangdong,Hebei and Henan FCHCV urban demonstration clusters are discussed in this study.It is found that the LCA results of Chinese hybrid grid electrolytic water FCHCV based on the electricity structure of Beijing and Guangdong are the highest and the lowest,respectively.The effects of12 kinds of hydrogen paths on the LCA results of FCHCV are quantitatively studied.The carbon emissions and energy consumption of FCHCV based on photovoltaic electrolytic water matching with pipeline hydrogen transport are the lowest.Finally,vehicle LCA prediction and evaluation models are established to quantitatively predict the life-cycle energy consumption and emissions of FCHCV and DHCV in 2035,and to evaluate the life-cycle energy saving and emission reduction potential of FCHCV.It is found that by 2035,the energy consumption and carbon emission of FCHCV based on photovoltaic electrolytic water will be 41.78% and 79.09% lower than those of DHCV,respectively.However,the energy consumption and carbon emission of FCHCV based on hybrid electric water electrolysis are 56.80% and 10.47% higher than DHCV,respectively.Therefore,FCHCV based on hydrogen production from renewable energy sources has great potential for energy saving and emission reduction in the future,but FCHCV based on hydrogen production from hybrid grid has less competitiveness with DHCV in energy saving and emission reduction in the future.