A method optimizes the cryogenic pressure tank fill level which can be achieved during a refill in a motor vehicle. A heating device for heating a gas in the pressure tank has at least two modes, namely a regular operating mode, in which the heating device heats the gas in the pressure tank such that a specified pressure of the gas in the pressure tank is reached, and a continuous operation mode in which the heating device constantly heats the gas in the pressure tank such that the pressure of the gas in the pressure tank rises above the specified pressure. The method has the following steps: detecting the density of the gas in the pressure tank; comparing the detected density of the gas in the pressure tank with a specified density value; and if during the comparison it is determined that the detected density falls below the specified density value, either operating the heating device in the regular operating mode or switching the heating device from the regular operating mode to the continuous operation mode, in particular on the basis of a specified path to the destination of the motor vehicle and the service stations provided on the specified path to the destination for refilling the pressure tank with gas.

A method for filling or withdrawing from a pressurized gas tank. The tank having a wall having a cylindrical overall shape with dimensions and thermophysical properties that are given and known. The method including the regulation of the flow rate of the introduced or withdrawn gas, and/or of the temperature of the introduced gas, to avoid a situation in which the tank reaches a given high temperature threshold or a given low temperature threshold. The method including a step of estimating, by calculating in real time, at least one tank temperature from: the average temperature of the tank wall, the maximum temperature reached by the tank wall, the minimum temperature reached by the tank wall, and in that the flowrate of gas or the temperature of the gas is regulated depending on the calculated tank temperature.

Systems and methods for recharging a fire extinguisher are disclosed. The systems include a rigid frame to which a tank is affixed, with the tank being configured to hold pressurized inert gas. The systems include an inlet fill hose that includes a first ball valve and a second ball valve, with a proximal end of the inlet fill hose being fluidly connected to the tank and a distal end of the inlet fill hose being configured to be fluidly connected to a fire extinguisher. The systems further include an inert gas inlet port that is fluidly connected to the tank and includes a third ball valve, and an inert gas outlet port that is fluidly connected to the tank and includes a fourth ball valve. The systems also include a pressure gauge that is operably connected to the tank.

A device for filling a small portable pressure vessel from a larger pressure vessel with a compressed fluid such as carbon dioxide. The device comprises an inlet adapted to receive fluid from a pressurized source, and an outlet adapted to connect to a pressure vessel. Between the inlet and the outlet there is a fill valve and a vent valve and at least one cam shaft configured to rotate and operate the valves.

An apparatus, system and method for measuring quantity of a material are disclosed. One or more sensors are used to measure the quantity of the material are measured and error causing parameters are also measured. Error causing parameters are processed by executing one or more correction methodologies to determine a correction output. The quantity of the material is measured by using the correction output. One or values associated with the quantity of the material are measured and displayed. The one or more values are transmitted to a server and informative messages are received from the server.

To provide a calibration device for apparatus filling a gas such as hydrogen gas and capable of precisely measuring quantity of the gas that is filled at high pressure. A calibration device of the present invention includes: a filling vessel 2, accommodated in a measurement housing 1, to the filling vessel 2 a high pressure fuel gas such as hydrogen gas being fed from outside of the measurement housing 1; a scale 3 for measuring a weight of a fuel gas fed to the filling vessel 2; and a control device CU for eliminating an error caused by changing buoyant force from a gas in the measurement housing before and after filling the fuel gas.

According to one or more aspects, systems and techniques for hydrogen fueling with integrity checks are provided herein. Communicated parameters measured by on-board sensors of a vehicle may be cross-referenced against calculated parameters measured by sensors of a fueling station. For example, communicated parameters relating to a compressed hydrogen storage system (CHSS) tank of a vehicle to be fueled may be received at different time intervals. Calculated parameters may be calculated based on a mass of hydrogen fuel dispensed by a hydrogen fueling station from a reference point to one of the time intervals and densities of the CHSS tank of the vehicle at respective time intervals. An error may be calculated between the communicated parameters and the calculated parameters. A fueling mode, such as a conservative fueling mode or a non-conservative fueling mode, may be determined based on the calculated error.

Embodiments disclosed herein are directed to controlling the fueling process for a space launch vehicle based on a composition of a Liquefied (LNG) propellant being loaded onto the space launch vehicle. According to one embodiment, controlling a fueling process for a launch vehicle can comprise monitoring a flow of a fuel being loaded into a tank of the launch vehicle during the fueling process. Loading of the fuel into the tank of the launch vehicle can then be controlled based on the determined mass of the fuel and a predefined mass loading target for the fuel.

The present disclosure provides systems and methods for refilling fluid containers. A fluid container may include a bottle and a valve assembly. The valve assembly may include two valves and be configured to engage with the bottle and a filling head or dispensing head. A system is configured to provide pressurized fluid to the refillable container, monitor filling, determine when to stop filling, and determine how much fluid was provided. The valve assembly may include a float mechanism coupled to one of the valves of the valve assembly to ensure fluid flow is stopped when the fluid container is full. The fluid, which can include carbon dioxide, is stored in a storage tank. A flow system provides the fluid to a filling head, which engages with the fluid container. The flow system includes a transfer pump, valves, and sensors configured to provide the fluid to the filling head.

The invention relates to a method for filling a tank with a pressurized fuel gas, the average temperature of the gas in the tank is estimated in real time during the filling. The method includes, before the filling, determining the initial temperature of the gas in the tank, determining the initial pressure of the gas in the tank, determining the initial average temperature of the wall of the tank and determining the initial mass of gas in the tank. According to the method, during the filling, the enthalpy of the gas entering into the tank is determined as a function of time and the mass of gas injected into the tank is determined as a function of time or, respectively, the pressure in the tank is determined as a function of time. The average temperature of the gas at the time in the tank is determined in degrees K.