A method of processing biogas that includes obtaining a mobile tank containing biogas at a pressure greater than 1000 psig, connecting the mobile tank to a pressure let down system, and depressurizing the mobile tank to remove biogas therein. The depressurization includes removing gas from the mobile tank using the pressure let down system, and introducing a warming gas into the mobile tank.

A vehicle (100, 200, 300, 400) includes a chassis (110, 210, 310, 410), a gas storage tank (120, 220, 320, 420) for a gas, and a gas storage tank (120, 220, 320, 420) arranged between the chassis (110, 210, 310, 410) and the gas storage tank (120, 220, 320, 420) and connected to the chassis (110, 210, 310, 410) and the gas storage tank (120, 220, 320, 420), the first weighing device (140, 240, 340, 440) being arranged to measure a force exerted by the gas storage tank (120, 220, 320, 420) on the first weighing device (140, 240, 340, 440).

A hydrogen filling system of the present invention is provided with: a pressure accumulator; a pipe connecting the pressure accumulator and a hydrogen tank on a vehicle; a flow volume control valve, a pressure sensor, and a flow volume sensor with which the pipe is fitted; and a station ECU which operates the control valve under a predetermined filling condition. A gas filling method for filling hydrogen gas into the tank from the accumulator is provided with: a step of, after filling of the hydrogen gas has been started, calculating, using a detected value from the pressure sensor when the flow volume of hydrogen gas in the pipe has decreased, the value of a pressure loss coefficient correlated with a pressure loss caused in the pipe; and a step of changing the filling condition to a condition determined on the basis of the value of the pressure loss coefficient.

Station for filling one or more tank(s) with pressurized gas, in particular pressurized hydrogen, comprising at least two pressurized gas source stores, a transfer pipe having an upstream end connected parallel to the source stores and a downstream end intended to be connected to a tank to be filled, the station comprising a valve assembly for controlling the transfer of gas between the sources and the tank to be filled and an electronic controller connected to the valve assembly and configured to control the valve assembly, the electronic controller being configured to implement successive transfers of gas between the source stores and the tank to be filled via successive pressure balancing sequences, the electronic controller being configured to determine the temperature attained by the gas in the source stores or by the source stores during transfers of gas and, when said attained temperature is below a determined threshold, to prevent or to interrupt this transfer of gas or to reduce the flow of gas transferred during said transfer.

An amount Y of liquid hydrogen that has passed through a first valve and has been volatilized during a predetermined time after first and second valves are opened is calculated by using a pressure P0 in an internal space of a liquid hydrogen tank measured before the two valves are opened, a pressure P1 in the internal space measured after the lapse of the predetermined time since the two valves are opened, and an amount X of the gaseous hydrogen that has passed through the second valve during the predetermined time. A fluid level H of the liquid hydrogen in the liquid hydrogen tank after the lapse of the predetermined time since the two valves are opened is calculated by using a expression showing a relationship between the H and an amount Y1 of the liquid hydrogen that passes through the first valve and drops therefrom, and the Y.

A method for rapidly filling a compressed gas storage tank with a moderated temperature rise using a Coanda nozzle to inject the feed gas into the tank and using the Coanda nozzle to direct the feed gas along the inner surface of the storage tank; entraining the stored gas with the feed gas that is flowing under the influence of the Coanda effect to flow along the inner surface of the gas storage tank; and transferring heat from the flowing gas to the external walls of the tank. Also, a compressed gas storage tank for rapid filling with a moderated temperature rise comprising: a gas storage tank and a Coanda nozzle capable of directing feed gas that is injected into the gas storage tank along the inner surface of the gas storage tank.

An apparatus for hydrogen dispensing can be configured to generate a display to be output visually to a customer that may use a dispenser to fill a fuel tank with hydrogen fuel. The display can include a graphical user interface or other interface that can show the customer information about the dispensing of fuel that is being provided to the user. This displayed information can include information to indicate an estimated time remaining to fully fill a vehicle's fuel tank so the customer can have visual and/or audible indications for how much longer the customer may have to wait to have the vehicle's fuel tank filled for continued use of the dispenser. This can improve the customer's experience at the fueling station. For instance, embodiments can allow the customer to more effectively use the fueling station and manage his or her time at the fueling station.

A method for calculating the remaining usage time of a gas cylinder equipped with a pressure reducer, the method comprising the following steps: (a) measuring the pressure of the gas in the cylin-der; (b) calculating the variation of pressure of the gas in the cylinder over time while gas is out-putted; (c) calculating a remaining usage time Tr based on the measured pressure in the cylinder and the calculated variation of pressure. Step (c) takes into account characteristics of the pressure reducer relative to variations of its nominal flow rate along the decrease of its inlet pressure while emptying the cylinder.

The invention relates to a pressurized gas container, in particular a gas cylinder, having an internal volume for gas storage, a fluid-distributing valve, a pressure sensor and microprocessor-based control means. The microprocessor-based control means are configured to detect filling of the gas container with gas, by comparing said at least one pressure value measured by the pressure sensor with at least one predefined and stored reference pressure threshold value; then to initiate a timer on the basis of a detection of filling of the gas container with gas; and to trigger a warning when the timer exceeds a given period calculated from the initiation of the timer.

This invention relates to a method and a system for calculating in real-time the duration of autonomy of a non-refrigerated tank containing natural gas comprising a liquefied natural gas (LNG) layer and a gaseous natural gas (GNG) layer. This invention also relates to a system for calculating, in real time, according to the method of the invention, the duration of autonomy of a non-refrigerated tank, as well as a vehicle comprising an NG tank and a system according to the invention.