Method for estimating a volume of a reservoir to be filled from a pressurized fluid distribution station

A method for estimating a volume (V) of a reservoir to be filled from a station for distributing a pressurized fluid such as gaseous hydrogen, the method comprising:

• injecting a pressurized fluid into the reservoir,
• determining a pressure variation (dp) in the reservoir after the injection of the flow of fluid, the pressure variation being determined with respect to an initial pressure (p0) of the reservoir before the injection,
• determining an amount (dm) of fluid flow injected into the reservoir,
• estimating the volume (V) of the reservoir to be filled on the basis of the amount (dm) of the fluid flow injected into the reservoir and on the basis of the pressure variation (dp) in the reservoir after the injection of the fluid flow,
• wherein the volume (V) of the reservoir to be filled is also estimated on the basis of an injection temperature (Tinj), wherein the injection temperature (Tinj) comprises a temperature of the fluid flow entering the reservoir, and on the basis of a temperature variation (dT) in the reservoir after the injection of the fluid flow, the temperature variation being determined with respect to an initial temperature (T0)) of the reservoir before the injection.