摘要:
Die Erfindung betrifft ein Verfahren zum Verdichten von Isolierschüttgut (S), aufweisend die Schritte: Einfüllen von Isolierschüttgut (S) in einen Isolierraum (I) eines zu isolierenden Behälters (1), Evakuieren des Isolierraumes (I) zur Herstellung eines Unterdrucks im Isolierraum (I) relativ zu dem Druck in einem den Behälter (1) umgebenden Außenraum (A), Versetzen des Behälters (1) in eine Vibration zum Verdichten des Isolierschüttguts (S), und Beaufschlagen des im Isolierraum (I) befindlichen Isolierschüttguts (S) mit einem Gas (G) zum Verdichten des Isolierschüttguts (S).
摘要:
Methods and apparatus for offloading CNG from high-pressure storage vessels (22) are provided. The methods and apparatus are operable to warm the offloaded CNG either before or after a letdown in pressure to ensure that the delivered product is gaseous and that delivery of condensed products to downstream equipment is avoided. Particularly, a heating assembly (32) configured to warm a stream offloaded from a vessel (22) and flowing through a coil-shaped conduit (84) by infrared energy emitted by one or more heating elements (70) is provided upstream or downstream of a pressure reduction device (50).
摘要:
A pressure vessel is provided including an inner tank formed from a tank liner surrounded by a wound layer of composite filaments. A protective jacket is disposed on the inner tank that facilitates stacking and portability of the pressure vessel and helps to define an air passage for convective heat transfer between the hybrid tank and the environment.
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:
The invention provides a method of treatment of hydrocarbon fluid flowing through a pipeline comprising an in-field flowline and downstream thereof a larger internal cross-sectional area trunkline, said method comprising introducing a gas hydrate formation inhibitor into hydrocarbon gas at a site in said pipeline and downstream thereof cooling the gas in said pipeline to a temperature close to or below the water dew point thereof whereby to condense water from the gas such that the water dew point of the gas entering said trunkline is close to or lower than the ambient temperature.
摘要:
Liquefied natural gas is regasified to form natural gas, including circulation of an intermediate fluid between a vaporizer and an ambient air heater, where the intermediate fluid is warmed by exchanging heat with the ambient air as the intermediate fluid passes through the ambient air heater, and the intermediate fluid is cooled by exchanging heat with LNG as the intermediate fluid passes through the vaporizer. The ambient air heater is subjected to a defrosting cycle by intermittently regulating the temperature of the intermediate fluid fed to the ambient air heater to a temperature greater than zero degrees Celsius using a source of supplemental heat.
摘要:
This distribution station (6) for cryogenic liquid comprises a rear surface, a front surface, and two side surfaces each connecting the rear surface to the front surface, a monitoring screen (52), and at least one control button (54), a filling pipe (42), a vapor collection pipe (44) extending from the distribution station, the filling pipe (42) and the vapor collection pipe (44) extending outside of the station from the rear surface of the distribution station, and the monitoring screen (52) being arranged substantially parallel to the rear surface and oriented away from this rear surface, and at least one control button (54) being arranged on the front surface.
摘要:
A fuel supply system includes a fuel gas tank; a temperature detecting portion; a fuel gas discharge flow path; a main stop valve that is provided in the fuel gas discharge flow path; and a control portion. The main stop valve includes an inlet portion and an outlet portion, a main valve that is arranged between the inlet portion and the outlet portion and that opens and closes the fuel gas discharge flow path, a pilot flow path that is provided so as to communicate the inlet portion with the outlet portion, a pilot valve that opens and closes the pilot flow path, and an actuator capable of opening and closing the main valve and the pilot valve at different timings. The control portion opens the pilot valve and closes the main valve when the detected temperature is equal to or lower than a first reference temperature.
摘要:
Methods and systems for reducing a pressure of compressed natural gas and for delivering natural gas are disclosed. A regulator comprising a vortex tube may be used to reduce the pressure of compressed natural gas while a temperature thereof is also reduced. The temperature reduction associated with a pressure drop in the compressed natural gas is achieved by throttling the gas at constant enthalpy from about 206.8 bar (about 3,000 PSIG) to 10.3 bar (150 PSIG) through the regulator. At least one heat exchanger may be utilized to increase the temperature of the compressed natural gas to a temperature suitable for injection delivery. A pressure-reducing regulator may be used to further reduce a pressure of the gas to about 3.1 bar (about 45 PSIG) for delivery to an end-user.