A control conduit for liquid hydrogen offloading is configured to couple a controller of a liquid hydrogen offload system to a liquid hydrogen tanker. The control conduit includes a control line and a gas detector. The control line is configured to transmit a control signal from the controller to the liquid hydrogen tanker. The gas detector is configured to detect hydrogen gas and provide a gas detector signal to the controller. The gas detector is secured to the control line at a predetermined distance from a tanker connection end of the control line.

One or more indicators provide an indication of fueling status of a hydrogen powered vehicle. One or more sensors detect temperature and/or other characteristics of the fuel provided to the vehicle and provide an electrical signal to one or more of the indicators to permit an indication of fueling status. The indicators, which may be visual and/or audible, may be positioned on the fueling apparatus and on the vehicle in the vicinity of a fueling receptacle. The indicators may also be positioned elsewhere on the vehicle and may be separate from the vehicle such as on or around a fueling station and/or on separate computerized devices.

A computer-controlled method of automatically purging and precooling a hydrogen fuel line prior to transferring hydrogen fuel from a source to a storage tank includes purging moisture from a hydrogen fuel line. The hydrogen fuel line is configured to fluidically couple a hydrogen tanker storage tank and a fueling station storage tank, the hydrogen storage tanker storage tank and the fueling station storage tank configured to store liquid hydrogen. The method also includes pre-cooling the hydrogen fuel line, causing hydrogen fuel to flow through the hydrogen fuel line to re-fill the fueling station storage tank, and expelling residual hydrogen fuel from the hydrogen fuel line when the fueling station storage tank re-filling is complete.

A method for filling at least one buffer container of a hydrogen filling station, the station comprising a fluid circuit linked to said at least one buffer container, the circuit of the filling station comprising a first end linked to at least one source of hydrogen gas, the circuit comprising a second end provided with a transfer conduit intended to be removably connected to a tank, the method being characterized in that it comprises a step of determining the current concentration of at least one impurity in the hydrogen in the buffer container during the filling of same, a step of comparing said current concentration of the impurity relative to a predefined threshold concentration and, when the current concentration of the at least one impurity reaches said threshold concentration, stopping the filling of said buffer container.

A nozzle device includes: a charging nozzle configured to supply a charging fluid and provided to be connected to a receptacle provided in a subject; a cover member to surround the charging nozzle and the receptacle; and a fluid supply unit to supply an interior of the cover member with an anti-freezing fluid for inhibiting freezing between the charging nozzle and the receptacle, thereby obtaining an advantageous effect of preventing freezing of the receptacle and improving safety and reliability. In addition, the nozzle device may include a hydrophobic coating layer for inhibiting freezing.

An automatic system and method to detect moisture in a compressed gas cylinder is faster, less labor intensive and has increased accuracy, including the ability to detect free moisture, over prior methods and devices. This device and method avoid the need to individually invert cylinders. A system to detect moisture level in a compressed gas cylinder includes a gas vent/fill line that is in fluid communication with a compressed gas cylinder; a vacuum system with a vacuum line and a vacuum pump connected to the vacuum line; and a dewpoint monitor connected to a dewpoint line and the vacuum line. When a compressed gas cylinder is connected to the gas vent/fill line, the vacuum pump draws gas from the gas vent/fill line into the vacuum line and the dewpoint line, and into the dewpoint monitor, where the dewpoint monitor measures moisture content in compressed gas.

Systems and methods provide a self-contained sealed apparatus that captures, filters, compresses and stores methane gas produced by the decomposition of bio-degradable organic materials. The system includes a rotatable and sealable chamber with an intermittent drive unit that mixes moist bio-degradable material during an anaerobic reaction, and captures methane gas generated by anaerobic decomposition. A filter to remove impurities, a low-pressure storage tank, a compressor and a high-pressure storage tank are interconnected and controlled by a system that monitors system parameters, that may include gas flow rate, temperature, and gas volume, and controls system parameters, that may include drive unit activation, generator operation, and compressor operation.

A computer-controlled method of automatically purging and precooling a hydrogen fuel line prior to transferring hydrogen fuel from a source to a storage tank includes purging moisture from a hydrogen fuel line. The hydrogen fuel line is configured to fluidically couple a hydrogen tanker storage tank and a fueling station storage tank, the hydrogen storage tanker storage tank and the fueling station storage tank configured to store liquid hydrogen. The method also includes pre-cooling the hydrogen fuel line, causing hydrogen fuel to flow through the hydrogen fuel line to re-fill the fueling station storage tank, and expelling residual hydrogen fuel from the hydrogen fuel line when the fueling station storage tank re-filling is complete.

A bayonet coupling system includes a bayonet, a bayonet coupler, and a seal. The bayonet includes a bayonet tube configured to enable the flow of hydrogen fuel therethrough, and a flange coupled to the bayonet tube. The seal is configured to surround the bayonet tube and contact the flange along one side of the flange. The bayonet coupler includes a bayonet coupler tube having an inside diameter larger than an outside diameter of the bayonet tube, the bayonet coupler tube configured to receive the bayonet tube and to seal against the flange at the seal. The bayonet coupler is fixedly mounted directly or indirectly to a hydrogen storage tank such that a longitudinal axis of the bayonet coupler is inclined a predetermined angle with respect to horizontal to prevent a substantial thermal gradient from forming at the seal.

A nozzle device includes: a charging nozzle configured to supply a charging fluid and provided to be connected to a receptacle provided in a subject; a cover member to surround the charging nozzle and the receptacle; and a fluid supply unit to supply an interior of the cover member with an anti-freezing fluid for inhibiting freezing between the charging nozzle and the receptacle, thereby obtaining an advantageous effect of preventing freezing of the receptacle and improving safety and reliability. In addition, the nozzle device may include a hydrophobic coating layer for inhibiting freezing.