A hydrogen refuelling station (HRS) is one of the central items required to assure “H2 mobility” using hydrogen-powered vehicles. The study presents an initial analysis of the system's thermodynamics and considers the filling of a user’s car tank as a partial depressurization of the main hydrogen tank. This problem was discussed in an article presented in the last edition of this conference (CISAP 11). Some of the graphs presented were questionable due to the incorrect thermodynamics used. Since the calculated temperature profile could not be reproduced, a new corrected temperature graph is presented. The second part of the study presents the depressurization of the main hydrogen storage tank to the atmosphere. The time required to depressurize, the pressure and temperature profiles, and the discharge flow rate are calculated. The case analyzed is the depressurisation event of an H70 (70 MPa) dispensing station starting from the maximum pressure of 90 MPa.
