Starting from the characteristics of hydrogen fuel,we outline the classification and advantages and disadvantages of fuel cells,and the technical characteristics of internal combustion engines and gas turbines that use hydrogen as fuel.It focuses on the current research status of fuel cell locomotives and analyzes the prospects of the above types of power units using hydrogen fuel at the present stage.Currently,fuel cell loco-motives,as a class of self-contained locomotives using new energy sources,can be used as an effective alter-native to internal combustion locomotives with their better advantages,and play an important role in the shunt-ing and engineering operation industries,and can be fully utilized in the southwestern region where the number of tunnels is large.Considering that the fuel cell itself can only be used for power generation but not energy storage,the fuel cell hybrid locomotive,which is a combination of fuel cell and energy storage components,has a better development prospect.Internal combustion locomotives and gas turbine locomotives fueled by hydro-gen can be used as alternatives to further promote the application and development of hydrogen fuel in the field of railroad transportation.
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