A gas cylinder monitoring device (34) for use with a valve (18) for controlling the flow of gas from a cylinder (14). The valve (18) has a valve body (20), and the device comprises an ambient temperature sensor (38) to measure the ambient temperature (TA), a valve body temperature sensor (36) to measure the temperature (TV) of the valve body, and a processor (42). The processor (42) operates to process a compensated temperature (CT) calculated from the difference between the measured valve body temperature (TV) and the ambient temperature (TA) over time (t). A flow-rate (FR) of the flow of gas from the cylinder and/or the pressure (P) on the gas is determined.

A system and device for monitoring the content of a gas/liquid or gas only containment vessel such as a cylinder is provided. The disclosed apparatus is easily affixed to a standard gas cylinder and configured to monitor the pressure of the cylinder contents and activate a visual and/or audio alarm when the contents of the gas/liquid cylinder are no longer in a liquid or partially liquid state as well as activate another visual and/or audio alarm at a prescribed pressure when the contents of the cylinder are nearing depletion.

Control system and method for controlling state of hydrogen charge in hydrogen storage system in a vehicle to prevent hydrogen boil-off losses. The control system obtains information about predetermined stop duration and location for vehicle; obtains information on required hydrogen usage for reaching predetermined stop location from a current location of the vehicle; obtains information on a maximum hydrogen level of the hydrogen storage system to prevent hydrogen boil-off losses when the vehicle reaches the predetermined stop location and the stop duration starts; and generates a control signal for controlling the state of hydrogen charge of the hydrogen storage system based on a current hydrogen level in the hydrogen storage system when the vehicle is at the current location, the required hydrogen usage for reaching the predetermined stop location and the maximum hydrogen level of the hydrogen storage system to prevent hydrogen boil-off losses.

A cryogenic liquid dispensing device may include a cryogenic cylinder for containing a cryogenic liquid. A dispensing pipe may be in fluid communication with the cryogenic cylinder. A dispensing valve may be configured to govern the fluid communication between the dispensing pipe and the cryogenic cylinder. A heating element may be disposed within the cryogenic cylinder, and the heating element may be configured to generate heat within the cryogenic cylinder to increase the pressure within the cryogenic cylinder. By generating heat within the cryogenic cylinder, the pressure within the cylinder may be increased and used to motivate a cryogenic fluid within the cylinder to the dispensing valve and out of the dispensing pipe. Preferably, the device may include a processing unit that may be configured to cause the heating element to generate heat within the cryogenic cylinder when a pressure reader detects a minimum pressure within the cryogenic cylinder.

A fluid supply device including a pressurized fluid valve, including a body, a fluid circuit accommodated at least in part in the body, the fluid circuit having an upstream end configured to be connected to a reserve of pressurized fluid and a downstream end configured to be connected to a receiving device, the fluid circuit including at least one member for controlling the flow rate in the fluid circuit and a member for actuating the fluid circuit, the at least one control member including an adjustable flow rate regulator, controlled by a data acquisition and processing electronic unit integrated into the valve and including an antenna or a wired connection configured to receive a remote control signal from the flow rate regulator to monitor and to control remotely the flow rate imposed by the flow rate regulator.

A device for supplying pressurized fluid including a pressurized fluid cylinder, at least one first tap connected to the pressurized fluid cylinder, the tap including an internal fluid circuit including an isolation valve, the device including an electronic apparatus for the wireless remote communication of data via electromagnetic waves, the electronic communication apparatus including a communication element designed to communicate wirelessly using at least one of the following frequency-modulation and/or phase-modulation low-consumption and long-range communication technologies: LoRa communication technology, communication technology from Sigfox, where the device includes a protective cap mounted on the cylinder in order to protect the first tap and a second tap connected detachably to the first tap, and the electronic communication apparatus being situated either on the cylinder, on the cap, on the first tap, or on the second tap.

A heat exchange system employed to gasify liquid natural gas (LNG) or for other required purpose includes the cold substance such as LNG, a heat dissipation apparatus, a water storage tank, a heating portion, and a cooling portion. The heating portion is coupled between the cold substance and the water storage tank. The cooling portion is coupled between the heat dissipation apparatus and the water storage tank. The cooling portion transmits heat of the heat dissipation apparatus to water of the water storage tank to cool the heating portion, and the heating portion transmits heat of the water of the water storage tank to the cold substance.

A power management system and method including a normally-open switch, an on/off circuit, a microprocessor, and at least one sensor to monitor a condition. The on/off circuit includes an on/off control gate-controlled switch device such as a PMOS device for system power, a flip/flop switch to respectively activate and deactivate the on/off control PMOS device, and a transition detection circuit connected to the normally-open switch. A single DC power source establishes a source voltage to power the on/off circuit and the normally-open switch. The transition detection circuit generates an on signal when the user initially activates the normally-open switch, and supplies the on signal to the flip/flop switch to change it to an on state to activate the on/off control PMOS device. While activated, the on/off control PMOS device enables system power from the power source to be provided to at least the sensor and the microprocessor. The microprocessor generates an off signal when the normally-open switch is activated for at least a selected period of time, and supplies the off signal to the flip/flop switch to change it to an off state to deactivate the on/off control PMOS device and thereby disable system power to at least the sensor and the microprocessor.

The invention relates to a device for providing pressurized fluid. The device includes a first functional assembly including a pressurized fluid bottle having an opening having attached therein a first tap including an inner fluid circuit including an insulating valve. The device includes a second functional assembly forming a physical entity separate from the first assembly. The second assembly includes a second tap having an inner fluid circuit. The first tap and the second tap include respective coupling members forming a removable rapid connection system. The device includes in the first assembly at least one electronic data storage communication unit that is removably, wirelessly queryable via electromagnetic waves and in that the second assembly includes at least one electronic communication unit for removably, wirelessly reading, via electromagnetic waves, data from the electronic member of the first assembly.

A gas cylinder monitoring system (10) for monitoring the contents of a gas cylinder in an EMS vehicle (50) including a gas cylinder (12) for receiving and distributing gas therein, an individual cylinder monitoring system (14) operable to monitor data associated with the gas cylinder (12) and having a cylinder monitoring transmitter (16) operable to broadcast the data, and at least one receiving station (60,70) having a receiver (18,20) operable to receive the data from the individual cylinder monitoring system (14) and indicate if the contents of the gas cylinder (12) are below a pre-determined threshold and require replacing.