VIRTUAL GASEOUS FUEL PIPELINE
Various embodiments provide an end-to-end gaseous fuel transportation solution without using physical pipelines. A virtual pipeline system and methods thereof may involve transportation of gaseous fuels including compressed natural gas (CNG), liquefied natural gas (LNG), and/or adsorbed natural gas (ANG). An exemplary pipeline system may include a gas supply station, a mother station for treating gaseous fuels from the gas supply station, a mobile transport system for receiving and transporting the gaseous fuels, and user site for unloading the gaseous fuels from the mobile transport system. The unloaded gaseous fuels can be further used or distributed.
1 . A method of transferring compressed gas from a vessel of a mobile transport system to a user site, the method comprising:
initially transferring compressed gas from the vessel to a fluid passageway at the user site via a first pathway, but not a second pathway; and
subsequently transferring compressed gas from the vessel to the fluid passageway via the second pathway in response to a predetermined event.
2 . The method of claim 1 , wherein:
a pressure differential between the vessel and the fluid passageway is larger during the first time period than during the second time period, and
the second pathway has a lower resistance to gas flow than the first pathway.
3 . The method of claim 1 , wherein:
a pressure differential between the vessel and the fluid passageway is larger during the first time period than during the second time period, and
the first pathway includes a gas regulation device that is omitted from the second pathway.
4 . The method of claim 3 , wherein the gas regulation device comprises a heater or a pressure reduction device.
5 . The method of claim 1 , wherein:
a pressure differential between the vessel and the fluid passageway is larger during the first time period than during the second time period, and
the second pathway has a lower resistance to gas flow than the first pathway.
6 . The method of claim 1 , wherein the predetermined event comprises:
a. pressure in the vessel falling below a pressure threshold;
b. a pressure differential between the vessel and the fluid passageway falling below a differential pressure threshold; or
c. a flow rate from the vessel to the fluid passageway falling below a rate threshold.
7 . A method of transferring gaseous fluid from a source vessel to a destination vessel, the method comprising:
actively refrigerating the gaseous fluid within the source vessel;
fluidly connecting the source vessel to the destination vessel via a fluid passageway such that refrigerated gaseous fluid from the source vessel flows into the destination vessel; and
actively refrigerating a portion of the fluid passageway during said flow of refrigerated gaseous fluid from the source vessel to the destination vessel.
8 . The method of claim 7 , wherein the gaseous fluid comprises gaseous fuel.
9 . The method of claim 7 , wherein the active refrigeration of the portion of the fluid passageway comprises Joule-Thompson cooling of the refrigerated gaseous fluid via a Joule-Thompson mechanism disposed in the fluid passageway.
10 . The method of claim 9 , wherein the passageway comprises hoses that are not rated for a temperature below −20° F., and wherein the Joule-Thompson mechanism is disposed downstream along the passageway from the hoses.
11 . The method of claim 7 , wherein the source vessel comprises a stationary storage vessel that is not disposed on a mobile transport system.
12 . The method of claim 7 , wherein during the flow of gaseous fluid from the source vessel to the destination vessel, the destination vessel is supported by a wheeled frame.
13 . The method of claim 7 , wherein when the fluidly connecting begins, (a) a gaseous fluid pressure in the source vessel is at least 1500 psig, and (b) a gaseous fluid pressure in the destination vessel is lower than in the source vessel.
14 . The method of claim 7 , wherein the active refrigeration of the source vessel keeps a temperature of the source vessel below 20 degrees F.
15 . A method of transferring compressed gas from a cascade of sequentially-higher pressure source vessels to a target vessel, the method comprising:
sequentially transferring compressed gas to the target vessel from sequentially higher pressure source vessels; and
using a tandem piggyback compressor to sequentially transfer compressed gas from relatively low pressure ones of the source vessels to relatively higher ones of the source vessels.