Systems and methods for remotely monitoring contents of a vessel in real-time. Along a shipping route, status of the contents (e.g., volume) is periodically and automatically transmitted to a remote user. A method includes determining volume of contents in a vessel at a first location along a route, determining volume of the contents in the vessel at a second location along the route, and comparing the two determined volumes. If the change in volume satisfies a preset threshold, then the method includes triggering a notification to a remote user.

A method for managing the filling levels of a plurality of tanks arranged in a ship, said tanks being connected in such a way as to allow liquid to be transferred between said tanks, the method comprising providing an initial state (7) of the tanks, determining a target state (8) defining respective final filling levels of said tanks, determining a liquid transfer scenario (9), the transfer scenario defining one or more flows of liquid to be transferred between the tanks during a transfer period in order to shift from the initial state to the target state of the tanks, calculating a probability of damage to the tanks (10) during the course of said transfer scenario, as a function of successive filling levels of the tanks during the transfer period, if the probability of damage to the tanks satisfies an acceptance criterion, transferring (13) the liquid between the tanks in accordance with said transfer scenario.

A hydrogen supplying device includes a liquid hydrogen pump, an evaporator, a pressure chamber configured to be filled with hydrogen gas flowing therein from the evaporator and to supply the filled hydrogen gas to a hydrogen engine, and a pump control unit configured to adjust a discharge flow rate of the liquid hydrogen pump based on both a flow rate of hydrogen to be supplied to the hydrogen engine and an actual pressure in the pressure chamber.

According to one aspect of the present invention, a hydrogen fuel filling system includes a first flow passage through which hydrogen fuel supplied from a pressure accumulator that accumulates hydrogen fuel under pressure passes; a second flow passage through which hydrogen fuel supplied from the pressure accumulator passes, and which is arranged in parallel with the first flow passage; a switching valve that switches flow passages selectively from one of the first and second flow passages to another, or that switches flow passages between one and both of the first and second flow passages; and a control circuit that controls opening/closing of the switching valve, wherein a fuel cell vehicle using hydrogen fuel as a power source is filled with hydrogen fuel while switching the flow passages by the switching valve during supply from the pressure accumulator.

According to one aspect of the present invention, a method for diagnosing failure in a pressure gauge of a hydrogen filling system includes filling a fuel cell vehicle powered by hydrogen fuel with the hydrogen fuel from an accumulator, in which the hydrogen fuel is accumulated, via a dispenser; and acquiring pressure values measured by a plurality of pressure gauges disposed at different positions in a flow passage of the hydrogen fuel between the accumulator and an outlet of the dispenser at timing when a flow rate of the hydrogen fuel to be filled at a stage close to an end of the filling becomes a threshold value or less, determining whether or not a deviation between the pressure values is within a threshold value on the basis of acquired pressure values, and outputting a determination result.

Method for filling a tank with pressurized gas to a target pressure from at least one pressurized gas source via a transfer pipe provided with at least one valve, the tank having a predetermined inner length and predetermined inner diameter, the end of the transfer pipe forming an injector with a predetermined injection diameter; said method comprises a step for transferring pressurized gas from the source to the tank at a predetermined flow rate, the method comprising a step of controlling the transfer of gas from the source to the tank to reduce the heat produced in the tank, the step of controlling the transfer of gas comprising at least one of: sizing of the injection diameter, and sizing of the flow rate of the transferred gas; the control step being carried out according to the ratio L/D between the length and the diameter of the tank.

A method and system for determining a momentary boil-off rate for a storage tank for a natural gas in liquid phase and gas phase. A mass flow from the gas phase of the natural gas at an discharge pipeline of the storage tank and a mass flow into the liquid phase of the natural gas at an loading/discharge pipeline of the storage tank is determined. A volume, a temperature and a pressure of the gas phase of the natural gas is measured. A dynamical model is applied to the determined values to determine the momentary boil-off rate.

A management system includes a position detection unit which obtains a position of a work machine, a posture detection unit which obtains a posture of the work machine, an object detection unit which obtains a three-dimensional shape of a buried object, a position calculation unit which obtains a position of the buried object by using the position of the work machine obtained by the position detection unit, the posture of the work machine obtained by the posture detection unit, and the three-dimensional shape of the buried object obtained by the object detection unit, and an information acquisition unit which acquires buried object information including at least the position of the buried object obtained by the position calculation unit.

A valve integrated pressure regulator (VIPR) assembly for dispensing a gas from a compressed gas cylinder is provided. The valve integrated pressure regulator (VIPR) includes a continuously adjustable, low pressure flow meter valve and a flow sensor incorporated directly into the valve body of the VIPR assembly.

A process for filling a gas tank made from a gas tank material with gas is provided, which process comprises the following steps: a) setting (S10) a nominal gas filling rate such that the tank is substantially completely filled within a predetermined filling time from a predetermined initial gas pressure value, b) determining (S20), assuming hot case tank conditions, a maximum mass-averaged gas filling temperature that will be reached at the end of the filling process, when filling the gas tank for the predetermined filling time with the nominal gas filling rate, c) selecting (S30) a target gas filling temperature not greater than the maximum mass-averaged gas filling temperature, d) cooling (S40) the gas to be supplied to the gas tank to the target gas filling temperature, e) starting the supply of gas to the gas tank, f) determining (S50) the actual mass-averaged gas filling temperature of the gas supplied to the tank, g) estimating (S60) an end-of-fill gas pressure from the actual mass-averaged gas filling temperature assuming cold case tank conditions, and h) terminating (S70) the supply of gas to the gas tank when the actual pressure of the gas tank is equal to the lower of the end-of-fill gas pressure and a maximum final fill pressure.