A device for fueling motor vehicles with a fluid used as a fuel and composed of liquefied gas, in particular liquefied natural gas, includes: at least one storage container; a cooling device; at least one conveying device for feeding the fluid from the at least one storage container to at least one fueling device for motor vehicles; and at least one line for supplying the fluid to the fueling device. The at least one line includes a media-conveying central pipeline as a medium pipe and at least one additional media-conveying pipeline that is arranged concentrically with respect to the central pipeline and defines an annular space together with the media-conveying central pipeline. The media-conveying central pipeline and the at least one annular space supply and return the fluid or a gas flow. The at least one additional media-conveying pipeline is surrounded by a jacket pipe.

A high pressure tank apparatus includes a high pressure tank, a leaked fluid container, and a supply/discharge side discharge flow path. The high pressure tank includes a liner made of resin, a reinforced layer that covers an outer surface of the liner, an insertion member that has formed therein a supply/discharge hole capable of communicating with an inside of the liner and the supply/discharge flow path; and a supply/discharge side cap in which are formed an insertion hole through which the insertion member is inserted and a supply/discharge side draw-out hole that draws out the fluid interposed between the liner and the reinforced layer. The supply/discharge side discharge flow path guides a temporarily released fluid that is the fluid drawn out via the supply/discharge side draw-out hole to a discharge region.

A high pressure tank includes: a resin liner for containing a fluid; a reinforced layer covering an outer surface of the liner; a cap including a supply/discharge hole to supply and discharge the fluid to and from the liner; an isolation wall member; and a communication unit. The cap includes a cylindrical protrusion having the supply/discharge hole formed therein. An opening is formed in the reinforced layer to expose the protrusion. The isolation wall member encloses the protrusion and the opening, and forms a closed space. The communication unit communicates with the closed space.

A CNG storage tank system with secondary containment and monitoring, such that any leaks from a primary containment tank are initially contained within a secondary containment tank, detected by a CNG sensing system in communication with a monitoring station, such that leaked CNG in the form of methane can be safely and controllably vented to the atmosphere or into CNG capture tanks. In addition, a tank expansion detection system may be employed to detect excessive expansion of the primary containment tank.

Leak testing is performed after filling a first tank with pressurized gas and before filling a second tank with the same via a filling circuit including first and second isolation valves. After the first tank is filled, the pressure of gas trapped between the two closed isolation valves is measured. If the pressure is below a predetermined threshold, the first isolation valve is opened until the pressure reaches or exceeds the predetermined threshold, at which time the first isolation valve is closed and the second isolation valve is opened so that the leak test may be performed. If the pressure is otherwise at or above the threshold, the leak test is performed.

A system for the storage and transportation of high pressure compressed natural gas. The system includes a gas distribution manifold having an inlet and an outlet, wherein the inlet is configured to be connectable to a natural gas supply source, and a plurality of storage vessels in fluid communication with the distribution manifold between the inlet and the outlet. The system further includes at least one isolation valve operatively connected between the gas distribution manifold and the plurality of storage vessels, wherein the at least one the isolation valve is configured to control gas filling and discharging of the plurality of storage vessels.

Gas supplying device including a changeover unit, the changeover unit including two inlets connected to two distinct pressurized gas sources, and one outlet connected to a user member, the changeover unit including an automatic and/or manual switchover mechanism making it possible to switch the supply of gas to the user member to one source or to the other source so as to ensure continuity of supply, the device including a pressure sensor measuring the gas pressure at the outlet and/or at least one inlet of the changeover unit, wherein the device includes an ambient temperature sensor and an electronic data processing and storage member, the electronic data processing and storage member receiving the measurement from the ambient temperature sensor and the measurement from the pressure sensor and being configured to calculate, the corrected variation in gas pressure which is not caused by the variation in ambient temperature.

A method of testing the seal of transportable containers, such as suitcases, trunks, and cases, which form inside them, in at least one closed configuration, at least one compartment to be seal tested, the method includes the following steps: accommodating a container to be tested, in the closed configuration, in a saturation chamber; dispensing a tracer gas in the saturation chamber; and lowering the pressure value inside the compartment. The method further includes waiting for a preset time, keeping the saturation chamber closed; drawing an air sample from the compartment; and measuring the actual concentration of tracer gas in the air sample drawn from the compartment. Thus, an actual concentration higher than a reference value, correlated to the normal concentration of tracer gas in the atmosphere, can indicate the entry of the tracer gas in the compartment and a condition of at least potential defectiveness of the seal of the compartment of the container.

A pressure vessel has a first end with a first boss, the first boss having a first outer surface. The vessel includes a liner having a second outer surface, a shell disposed over the second outer surface, and a first vent. The first vent is formed onto at least a portion of the first outer surface and at least a portion of the second outer surface. The first vent includes a texture that provides a higher rate of gas flow through the first vent than through a portion of an interface of the liner and shell lacking the texture. In another aspect, a pressure vessel has a first end and a second end, a plurality of first longitudinal vents and a plurality of second longitudinal vents. At least one of first longitudinal vents is circumferentially offset around the pressure vessel from at least one of the second longitudinal vents.

A transport refrigeration system (200) comprising: a vehicle (102) having a refrigerated cargo space (119); a refrigeration unit (22) in operative association with the refrigerated cargo space, the refrigeration unit providing conditioned air to the refrigerated cargo space; a first engine (26) configured to power the refrigeration unit; a plurality of first fuel tanks (330) fluidly connected to the first engine, the plurality of first fuel tanks configured to supply fuel to the first engine, wherein each of the plurality of first fuel tanks includes a lock off valve (450) and a pressure sensor (470) configured to detect a pressure level within each of the first fuel tanks; and one or more engine controllers (54) in electronic communication with each pressure sensor and lock off valve, the one or more engine controllers being configured to adjust at least one of the lock off valves in response to a pressure level detected by at least one of the pressure sensors.