Influence of the gas injector configuration on the temperature evolution during refuelling of on-board hydrogen tanks

Compressed hydrogen is the most suitable technology for storage in hydrogen fuelled vehicles. Due to the low density of the hydrogen, high pressures are required inside the tanks in order to have autonomy comparable to conventional vehicles. The compression of the hydrogen during refueling (performed in less than 5 minutes), produces the warming of the gas inside the tank. Different strategies are being studied in order to find the most practical, safe and efficient refueling; the aim is to reach a State of Charge (SOC) value above 95% in the shortest time without surpassing the safety temperature and pressure limits. There are different parameters affecting the average and maximum temperature of the gas achieved during a refueling. Some are related to the filling conditions (inlet temperature and mass flow rate) while others are related to tank characteristics (e.g. the type of liner, manufacturing materials, geometry or dimensions of the inlet opening). In this paper, an extensive analysis performed using different injector configurations to refuel 70 MPa composite reinforced commercial tanks is shown. The aim is to study the temperature stratification and the average temperature reached inside the tank for optimizing refueling strategies.

DE MIGUEL ECHEVARRIA Nerea;  ACOSTA IBORRA Beatriz;  MORETTO Pietro;  ORTIZ CEBOLLA Rafael; 

2015-09-30

Universidad Rey Juan Carlos Servicio de Publicaciones

JRC95170

978-84-697-0417-2,   

https://publications.jrc.ec.europa.eu/repository/handle/JRC95170,