SIMULATION STUDY ON THERMAL CONDUCTIVITY PERFORMANCE OF LARGE VOLUME VEHICLE LIQUID HYDROGEN CYLINDER DURING STORAGE AND TRANSPORTATION
A numerical model was established based on the actual structure of vehicle-mounted liquid hydrogen cylinders in order to study the thermal conduction safety of the cylinders during the storage and transportation of large-volume vehicles.The internal temperature and heat flux changes of the cylinders were simulated and analyzed under the coupling changes of single parameters and multi-parameters under the start-stop conditions of the cylinders under various environmental temperature,pressure,and acceleration conditions.The findings demonstrate that the heat flux in the cylinder increases as acceleration increases when a single parameter is changed.The heat flux falls as cylinder pressure rises;the heat flux increases with increasing room temperature.When there is a two-factor coupling,an increase in acceleration reduces the impact of ambient temperature decrease on the heat flux in the cylinder while simultaneously enhancing the impact of pressure increase;an increase in pressure reduces the impact of an increase in ambient temperature on the heat flux in the cylinder.It offers a theoretical foundation for the safe application of large-volume liquid hydrogen cylinders installed in vehicles.
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