The present invention relates to a method for improving stability of a hydrogen gaseous dispensing system. An example of such system is hydrogen powered vehicle fuel filling station. Vehicle is filled by multiple high pressure gaseous hydrogen tubes, usually one tube at a time. For safety and reliability reasons a control requirement for such system is to be able to deliver the hydrogen at constant rate to the fuel tank so that its rate of pressure increase stays constant during entire filling process. A dual pressure regulator arrangement is proposed to better maintain flow continuity and/or pressure during tube switching.

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 fueling station can include an outer housing comprising a housing volume, a first fluid bladder positioned within the housing volume and configured to hold a first fluid, a second fluid bladder positioned within the housing volume and configured to hold a second fluid, a first fluid conduit in fluid communication with the first fluid bladder, a second fluid conduit in fluid communication with the second bladder, a first hose positioned at least partially outside the outer housing and in fluid communication with both the first and second fluid conduits, and a bi-directional first nozzle connected to an end of the first hose opposite the first and second fluid conduits. The bi-directional first nozzle can be configured to simultaneously release fluid from the first hose and to collect fluid into the first hose. The first fluid bladder can be configured to release fluid through the first conduit in response to introduction of fluid into the second fluid bladder via the second conduit. The second fluid bladder can be configured to release fluid through the second conduit in response to introduction of fluid into the first fluid bladder via the first conduit.

A small scale natural gas liquefaction plant is integrated with an LNG loading facility in which natural gas is liquefied using a multi-stage gas expansion cycle. LNG is then loaded onto an LNG truck or other LNG transport vehicle at the loading facility using a differential pressure control system that uses compressed boil off gas as a motive force to move the LNG from the LNG storage tank to the LNG truck so as to avoid the use of an LNG pump and associated equipment as well as to avoid venting of boil off vapors into the environment.

For improving storage of hydrogen in a vehicle, a hydrogen tank assembly is provided for a vehicle. The hydrogen tank assembly includes an inner tank wall defining a hydrogen tank volume configured for storing liquid hydrogen; and an outer hydrogen collector defining, together with the inner tank wall, at least one cavity outside of the hydrogen tank volume and including at least one hydrogen outlet for leading gaseous hydrogen which leaks from the hydrogen tank through the inner tank wall into the at least one cavity to a hydrogen storage or a hydrogen consumer.

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 the temperature and pressure conditions of the hazard suppression material and compare these sensed values with the 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.

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 v

A refuelling device for supplying liquefied gas is provided, including a feed system adapted to place each reservoir in fluidic through connection with a tank and including withdrawal ducts for withdrawing the liquefied gas from the reservoirs; an inlet duct for introducing the liquefied gas into the tank; a collection manifold for conveying the withdrawal ducts into the inlet duct; a pump adapted to move the liquefied gas in the feed system; and a pressure gauge to measure the inlet pressure of the liquefied gas in the pump; and a valve adapted to regulate the flow in the inlet duct according to the inlet pressure.

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 present disclosure relates to systems and methods for fueling a tank of a heavy-duty vehicle having a total volume above 1000 liters with a gaseous hydrogen fuelin an accelerated manner An average slope of the mass flow of a first part of the fueling implemented as a first fueling method is higher than the slope of the mass flow of a second part of the fueling implemented as a second fueling method.