A type IV pressure vessel has improved permeate gas management. The pressure vessel comprises an inner polymeric liner, a breather layer disposed on the liner, and an outer composite shell structure disposed on the breather layer. The breather layer is gas permeable, impermeable to liquids, and provides a flow passageway for gas permeating through the liner wall collected by the breather layer. The outer composite shell is formed by one or more layers of fiber of a first fiber type and resin. Gas permeating from an interior space of the liner is received by the breather layer and directed to a predetermined exit location on the pressure vessel.

The invention relates to an indoor safety device for a liquefied fuel gas system, the system comprising a storage device storing liquefied fuel gas; a vent member arranged in fluid communication with the gas inside the storage device; and a safety valve arranged to evacuate gas when the pressure inside the storage device exceeds a predetermined first value, the safety device comprising: a vent coupling; a pressure relief valve arranged downstream of the vent coupling; and a conduit for conveying gas, adapted to be connected to the pressure relief valve, the safety device being removably connected to the system by connecting the vent coupling to the vent member, wherein the pressure relief valve is configured to release gas when the pressure inside the storage device exceeds a predetermined second value, lower than the first value.

A hydrogen refilling station for filling tanks of fuel cell electric vehicles includes a liquid hydrogen tank that feeds liquid hydrogen to an upstream end of a filling circuit that also includes a heat exchanger. The heat exchanger exchanges heat between the liquid hydrogen and heat transfer fluid flows to thereby cool the heat transfer fluid and vaporize the liquid hydrogen to provide a supply of high pressure hydrogen gas for filling hydrogen-fueled vehicle tanks at a downstream end of the circuit. Because the liquid hydrogen is surrounded by the heat transfer fluid inside the heat exchanger, little if any fogging occurs.

A hydrogen filling system includes a first tank and a second tank that are configured to be filled with hydrogen and communicate with each other, a first hydrogen feeder and a second hydrogen feeder configured to feed hydrogen to the first tank and the second tank, and a controller configured to control the first hydrogen feeder and the second hydrogen feeder. The controller estimates a hydrogen fill factor of the first tank and the second tank, based on a first internal temperature of the first tank and a second internal temperature of the second tank, and a first pressure of hydrogen gas fed from the first hydrogen feeder and a second pressure of hydrogen gas fed from the second hydrogen feeder. The controller is configured to stop the first hydrogen feeder and the second hydrogen feeder when the hydrogen fill factor reaches a predetermined threshold fill factor.

Gaseous fueling systems and methods are provided for dispensing fuel to a vehicle or container. The distribution systems speed up the filling process and may eliminate the use of expensive cooling systems required in the art. The methods utilize sequences of filling and emptying the vehicle gas storage tank to control the temperature of the gas inside the tank. These filling and emptying sequences may overlap. The methods repeatedly dispense fuel to the vehicle fuel tank at a first flow rate and for a first period of time and remove fuel from the fuel tank at a second flow rate for a second period of time, which periods may overlap, to maintain fuel temperature within a desired temperature range and until the vehicle fuel tank is filled to a desired level. In addition, the fill-up mass flowrate can be maximized to system capabilities so a fill-up can be completed in about one minute.

The present disclosure provides a carbon-fibre composite high-pressure hydrogen storage tank and a manufacturing process thereof. The hydrogen storage tank includes a tank body, wherein a gas guide port is formed in one side of the tank body, a reinforcing member for improving the strength of the tank body is arranged in an inner cavity of the tank body, a side end of the reinforcing member is fixedly connected to an inner wall of the tank body, and the tank body and the reinforcing member are all made of the carbon-fibre composite. The present disclosure can improve the whole strength and rigidity of the hydrogen storage tank and ensure the safer and more reliable hydrogen storage tank under a high pressure.

The invention relates to a fluid compression apparatus comprising a housing having a compression chamber, an intake system communicating with the compression chamber which is configured to allow fluid to be compressed into said compression chamber, and a mobile piston for ensuring the compression of the fluid in the compression chamber. The apparatus further comprises a discharge port which is configured to allow the exit of compressed fluid from the compression chamber, the compression chamber being defined by a portion of the body of the piston and a fixed wall of the apparatus, the piston being translationally mobile along a longitudinal direction. The invention is characterized in that the piston has a tubular portion mounted around a fixed central guide, a first terminal end of the central guide forming the fixed wall delimiting a part of the compression chamber. The apparatus also comprises a sealing system formed between the central guide and the piston according to the longitudinal direction of translation of the piston, the intake system being located at a first end of the apparatus, the discharge port being located at a second end of the apparatus.

Gaseous fueling systems and methods are provided for dispensing fuel to a vehicle or container. The distribution systems speed up the filling process and may eliminate the use of expensive cooling systems required in the art. The methods utilize sequences of filling and emptying the vehicle gas storage tank to control the temperature of the gas inside the tank. The methods repeatedly dispense fuel to the vehicle fuel tank at a first flow rate and for a first period of time and remove fuel from the fuel tank at a second flow rate for a second period to maintain fuel temperature within a desired temperature range and until the vehicle fuel tank is filled to a desired level. In addition, the fill-up mass flowrate can be maximized to system capabilities so a fill-up can be can be completed in about one minute.

A tank container for storing gases, in particular for storing hydrogen in a motor vehicle. The tank container includes a main body which is preferably tubular, and comprises reinforcement elements which are arranged on a wall of the main body and are produced using an additive manufacturing process.

A vehicle is provided with an interior chamber apart from a passenger compartment, and a container chamber in which a high pressure gas container is accommodated. A heat generating body is accommodated in the interior chamber. Further, in the vehicle, there are formed introduction ports through which atmospheric air is introduced into the interior chamber, a communication passage that enables communication between the interior chamber and the container chamber, and a lead-out port through which the atmospheric air is led out from the container chamber. The atmospheric air that is introduced into the interior chamber through the introduction ports flows into the container chamber via the communication passage, and furthermore, is led out to the exterior of the container chamber from the lead-out port.