Disclosed is a method for monitoring pressure, for a vessel assembly including a sealed vessel capable of holding a liquid, a filter capable of capturing vapors from the liquid, a pipe connecting the vessel to the filter, and an isolation valve arranged to selectively shut off the pipe, including a detection of the boiling of the liquid contained in the vessel.

A tank that may be used in combination with an actuating means such as a pneumatic door actuator includes a first, inner, enclosure positioned and enclosed within a second, outer, enclosure, to provide an enclosed chamber between the inner enclosure and outer enclosure. The pressure in the chamber may be measured with a gauge that does not extend into the inner enclosure. The measured pressure may then be monitored and compared in order to detect a change in pressure and thereby also detect a leak through a wall from the inner enclosure. The tank may also be used to inflate and/or deploy an emergency evacuation slide in an aircraft.

The invention relates to a method for a communication between a fueling device (2) and a vehicle (4), having the steps of coupling the fueling device to a tank (6) of the vehicle by means of a fuel hose (10), providing pressurized fuel to the fuel hose, varying the pressure on the fuel hose by superimposing a specified base pressure with a pressure sequence in order to modulate a first signal to be transmitted, detecting the pressure being applied to the fuel hose by means of the vehicle, and extracting the first signal to be transmitted from the detected pressure.

The invention relates to a method (200) for operating a tank device (1) for storing compressed fluids, having a tank (2), a valve device (100), a feed line (29), a flow-regulating element (27) situated in the feed line (29), and a control unit (64). The valve device (100) comprises a magnet apparatus (11), by means of which magnet apparatus (11) the opening and closing process of the valve device (100) can be controlled, the magnet apparatus (11) comprising a solenoid (10). A characteristic map (80) is stored in the control unit (64), in which characteristic map (80) reference pressure differences (70) with associated electrical current strengths for the solenoid (10) are stored, the electrical current strength being selected such that the valve device (100) is still open, an initial electrical current strength being stored in the characteristic map (80). The method is characterised by the following steps: a. applying (60) the initial electrical current strength to the solenoid (10); b. determining (61) the pressure p.sub.0 in the tank (2) and determining (61) the pressure p.sub.1 in the feed line (29) between the valve device (100) and the flow-regulating element (27); c. determining (62) the difference between the pressure p.sub.0 in the tank (2) and the pressure p.sub.1 in the feed line (29) between the valve device (100) and the flow-regulating element (27); d. assigning the determined difference between the pressure p.sub.0 in the tank (2) and the pressure p.sub.1 in the feed line (29) between the valve device (100) and the flow-regulating element (27) to one of the reference pressure differences (70) in the characteristic map (80) such that,if the determined difference between the pressure p.sub.0 in the tank (2) and the pressure p.sub.1 in the feed line (29) between the valve device (100) and the flow-regulating element (27) can be assigned to one of the reference pressure differences (70): i. selecting (64) an electrical current strength assigned to the determined reference pressure difference (70) for the solenoid (10); ii. applying (65) the selected electrical current strength to the solenoid (10); iii. cyclically repeating (66) steps a. to d.; if the determined difference between the pressure p.sub.0 in the tank (2) and the pressure p.sub.1 in the feed line (29) between the valve d

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.

A cryogen storage vessel at an installation is filled with liquid cryogen from a liquid cryogen storage tank that has a pressure lower than that of the vessel. After headspaces of the vessel and tank are placed in fluid communication with another via a gas transfer vessel and are pressure-balanced, a pump in a liquid transfer line connected between the tank and the vessel is operated to transfer amounts of liquid cryogen from the tank to the vessel via the liquid transfer line and pump as amounts of gaseous cryogen are transferred, through displacement by the pumped cryogenic liquid, from the vessel to the tank.

Intelligent temperature and pressure gauge assemblies (52) for use with vessels (24) having pressurized hazard suppression materials therein include temperature and pressure sensors (136, 138) coupled with a digital processor (72) with associated memory for storing empirical temperature and pressure data. The data includes normalized linear temperature-pressure curves consistent with static or slowly changing temperature conditions experienced by the vessels (24), as well as nonlinear temperature-pressure curves consistent with rapidly changing temperature conditions. In use, the assemblies (52) repeatedly sense temperature and pressure conditions of the hazard suppression material and compare sensed values with stored values, and generate an output in conformance with the comparison. In this fashion, the assemblies (52) compensate for rapidly changing temperatures without generating false failure signals.

A method for operating a valve of a pressure vessel system includes determining an actual pressure difference between an inlet pressure at an inlet of the valve and an outlet pressure at an outlet of the valve, and enabling the valve if the actual pressure difference is lower than or equal to a maximum admissible pressure difference of the valve.

The disclosure provides a gas filling method. The gas filling method includes the following steps: an effective heat mass calculation step, which uses the heat capacity of the piping and the detection value of the gas temperature sensor to calculate the value of the effective heat mass related to the temporary pressure loss caused by the piping before gas-filling is started; a pressure loss parameter calculation step, which uses the detection value of the pressure sensor when the flow rate of the gas in the piping changes to calculate the value of the pressure loss parameter related to the pressure loss caused by the piping after the gas-filling is started; and a filling condition changing step, which changes the filling condition into a condition that is defined based on the value of the pressure loss parameter and gas-filling is continued.

A system for filling an LPG vehicle with LPG using an auxiliary bombe is provided. The system may be configured for easily filling a main bombe with LPG even in the hot season (summertime) or the like during which the outside temperature rapidly rises, by using an auxiliary bombe in addition to using the main bombe. The system may also be capable of always smoothly refilling the main bombe with LPG by moving a portion of the LPG in the main bombe to the auxiliary bombe, when the pressure in the main bombe is higher than the LPG filling pressure of a filling gun in the hot season during which the outside temperature rapidly rises, so that the pressure in the main bombe becomes lower than the filling pressure.