Design Of Fuel Cell System Box For Tram And Temperature Field Analysis Of The Bop Cabin

With the research conducted for the technology of the tram rail, fuel cells tram rail become the focus of the study that makes tram rail get rid of electric tractive power supply system completely like internal combustion engines. Fuel cells boxes are power resources of the fuel cells tram, whose performance index and reliable quality index directly affect the running of the tram rail. Therefore, it is critical to design fuel cell boxes.The objective of this project is to design fuel cell boxes, which are applied to the fuel cell trams. In terms of design objective and operational environment of fuel cell boxes, the design requirements, design principles, design contents, the steps of design and the problems which should be paid attention to in the design process are proposed, on which each part of fuel cells box is designed in details that combines into a whole set of fuel cells box.For the design of fuel cells box, finite element model of fuel cells box is established. Application distribution chart was obtained using the Hyperwork software to analyze the fuel cells box’s strength at 8 different working conditions. The simulation results show the maximum stress is less than the allowable stress and fuel cells box meets the strength requirements.Taking into account of the narrow space in the auxiliary storage, a number of installed components, intensive layouts and heat dissipation, the physical and mathematical models of air flow and heat exchange in the auxiliary storage are set up, that describe the detailed turbulence models and their applications. Utilizing FLUENT software, SIMPLE algorithm analysis is conducted to attain speed and temperature distribution diagrams for steady-state analysis of the temperature field in the auxiliary storage, which is consistent with experimental test results.Based on the steady-state analysis of the temperature field in the auxiliary storage and considering the fuel cells’ current change curve, a UDF function was compiled. The FLUENT transient analysis of temperature field in the auxiliary storage is conducted to obtain the curves of temperature distribution over time, which are validated by the experimental test results.