摘要:
Warming high pressure storage tanks for hydrogen, CNG and industrial gases to compensate for thermal and mechanical stresses caused by a low temperature resulting from gas decompression in the tank as gas is depleted from the storage tank and/or environmental exposure of storage tanks in low temperature climate conditions. Heating is accomplished by 1 ) heating the tank system by passing an electrical current through a resistive structural material from which the tank is formed, 2) utilizing an electrical induction heating system to warm a liner in the tank or the polymer fiber composite forming the tank shell, 3) utilizing the Joule- Thomson effect to recover heat from high pressure gas exhausted from the tank and directing the recovered heat to the gas remaining in the tank and/or 4) combining either or both of heating the tank with an electrical current and utilizing an electrical induction system with a Joule-Thomson recovery heater.
摘要:
A cryogenic refrigeration system has a control system that controls the operation of the refrigeration system and provides status information to the operator of the refrigeration system. The cryogenic refrigeration system includes one or more heaters and at least one Joule-Thomson valve. The heaters are used to control the recondensing capacity of the refrigeration system and to heat the at least one Joule-Thomson valve and other points to melt away contaminants that may freeze at such points. The control system (70) controls operation of the heaters (31, 33). The control system also automates an initialization routine that utilizes the heaters to prevent blockage of the valves (30, 32) and cools the refrigeration system down to a desired temperature. In addition, the control system shuts down the refrigeration system if the status information it monitors exceed a safe range.
摘要:
An LNG fuel tank system for at least one gas engine used for ship propulsion is comprising at least one LNG fuel tank (4) and a gas vessel (8), the LNG fuel tank to be-bunkered from an onshore LNG pressure tank filling facility by means of an LNG filling line (1). According to the present invention the LNG fuel tank (4) is a ship low pressure controlled atmospheric pressure LNG tank, and the gas vessel (8) is a single shell non-insulated pressure vessel arranged to accumulate flashed and boil-off gas during LNG bunkering and pressure relieving the LNG fuel tank, respectively, and the gas engines are fuelled from either the gas vessel (8) or the LNG fuel tank (4), dependent on a predefined gas vessel pressure.
摘要:
Embodiments of a pressurized gas supply (10, 30, 50) are provided. In one embodiment, the pressurized gas supply includes a pressurized gas reservoir (14, 34, 54) and a pressure reducer (16, 40, 56) fluidly coupled to the pressurized gas reservoir. The pressure reducer is configured to reduce the pressure of gas received from the pressurized gas reservoir to a predetermined output pressure (Po). A gas mixture is held within the pressurized gas reservoir at a starting pressure (Ps) and at a starting temperature (Ts). The gas mixture includes: (i) a warming gas having a positive Joule-Thompson (JT) coefficient at Ts and over the pressure range Ps-Po, and (ii) a cooling gas having a negative JT coefficient at Ts and over the pressure range Ps-Po. The cooling of the cooling gas at least partially offsets the warming of the warming gas when the gas mixture is expelled by the isothermal gas supply to achieve a desired gas output temperature.
摘要:
A pressure vessel for storage and transportation of CNG comprises a body, which defines an internal volume in which the CNG is stored and transported. An inlet is provided through which the CNG can be loaded into the internal volume of the vessel. At the end of said inlet there is a CNG expansion section through which the CNG expands into the vessel when loaded. The pressure vessel further comprises a CNG loading appendage for injecting the CNG at a point inside the internal volume of the vessel, thereby increasing the space between the expansion point of the CNG and the walls of the vessel.
摘要:
Warming high pressure storage tanks for hydrogen, CNG and industrial gases to compensate for thermal and mechanical stresses caused by a low temperature resulting from gas decompression in the tank as gas is depleted from the storage tank and/or environmental exposure of storage tanks in low temperature climate conditions. Heating is accomplished by 1 ) heating the tank system by passing an electrical current through a resistive structural material from which the tank is formed, 2) utilizing an electrical induction heating system to warm a liner in the tank or the polymer fiber composite forming the tank shell, 3) utilizing the Joule- Thomson effect to recover heat from high pressure gas exhausted from the tank and directing the recovered heat to the gas remaining in the tank and/or 4) combining either or both of heating the tank with an electrical current and utilizing an electrical induction system with a Joule-Thomson recovery heater.
摘要:
Es wird ein Speicherbehälter, insbesondere ein Speicherbehälter für kryogene Medien, vorzugsweise für flüssigen Wasserstoff, aufweisend wenigstens eine Kondensierieitung, die der Zuführung von gasförmigem kryogenen Medium dient, beschrieben. Erfindungsgemäss weist die Kondensierleitung (3) wenigstens einen Wärmetauscher (W) auf, über den das zugeführte kryogene Medium im Wärmetausch gegen das gespeicherte kryogene Medium (F) abgekühlt wird. Des Weiteren wird ein Verfahren zum Befüllen eines Speicherbehälters mit einem gasförmigen kryogenen Medium beschrieben.
摘要:
A vaporizer for liquefied gas, such as liquefied petroleum gas, which includes a heat exchanger and a capacity control valve for controlling the inflow of liquefied gas to the heat exchanger. The heat exchanger has an inlet to accept liquefied gas and an outlet to release superheated gas vapor. The capacity control valve has an inlet to accept the liquefied gas from a source of liquefied gas, an outlet coupled to the inlet of the heat exchanger. The capacity control valve includes a valve positioned between the inlet and outlet of the capacity control valve, and movable between fully closed and fully open positions. The capacity control valve includes a diaphragm positioned between a thermal expansion chamber with a pressure dependent on the temperature of the gas vapor in the outlet of the heat exchanger sensed by a sensing bulb, and a liquefied gas inlet chamber with the pressure dependent on the pressure of the liquefied gas being supplied to the vaporizer by the liquefied gas source. The movements of the diaphragm move the value to regulate the flow of liquefied gas to the heat exchanger.
摘要:
A vaporizer for liquefied gas, such as liquefied petroleum gas, which includes a heat exchanger and a capacity control valve for controlling the inflow of liquefied gas to the heat exchanger. The heat exchanger has an inlet to accept liquefied gas and an outlet to release superheated gas vapor. The capacity control valve has an inlet to accept the liquefied gas from a source of liquefied gas, an outlet coupled to the inlet of the heat exchanger. The capacity control valve includes a valve positioned between the inlet and outlet of the capacity control valve, and movable between fully closed and fully open positions. The capacity control valve includes a diaphragm positioned between a thermal expansion chamber with a pressure dependent on the temperature of the gas vapor in the outlet of the heat exchanger sensed by a sensing bulb, and a liquefied gas inlet chamber with the pressure dependent on the pressure of the liquefied gas being supplied to the vaporizer by the liquefied gas source. The movements of the diaphragm move the value to regulate the flow of liquefied gas to the heat exchanger.