Abstract:
A pressure vessel refueling system enables consistent mass flow rates and reduces the in-tank temperature rise caused by the heat of compression as gas is added to a vessel. The system includes a pressure vessel having a first gas inlet/outlet port and an interior cavity, and a nozzle is in fluid communication with the first gas inlet/outlet port. The nozzle and the pressure vessel are thermally coupled such that Joule-Thomson expansion of a gas flowing through the nozzle cools the interior cavity and contents of the pressure vessel.
Abstract:
An improved vehicle fuel system enables mixing of natural gas and a liquid fuel upstream of a combustion cylinder. According to some embodiments the system includes: a gas pressure vessel and associated gas pressurization system to deliver natural gas at a desired pressure; a liquid fuel storage vessel and associated reservoir pump to deliver liquid fuel at a desired pressure; a mixing system configured to receive and mix the liquid fuel from the liquid fuel storage vessel and natural gas from the gas pressure vessel to produce a homogeneous fluid fuel mixture; and a common rail system connecting the mixing system to an engine that consumes the homogeneous fluid fuel.
Abstract:
A pressure vessel refuelling system enables consistent mass flow rates and reduces the in-tank temperature rise caused by the heat of compression as gas is added to a vessel. The system includes a pressure vessel having a first gas inlet/outlet port and an interior cavity, and a nozzle is in fluid communication with the first gas inlet/outlet port. The nozzle and the pressure vessel are thermally coupled such that Joule-Thomson expansion of a gas flowing through the nozzle cools the interior cavity and contents of the pressure vessel.
Abstract:
A pressure vessel refueling system enables fast refueling of Compressed Natural Gas (CNG) fuel tanks. The system includes a pressure vessel having a gas inlet/outlet port and a liquid inlet/outlet port; a first liquid at least partially filling the pressure vessel; a liquid layer of a second liquid floating on top of the first liquid, wherein the second liquid is immiscible with the first liquid; a gas at least partially filling the pressure vessel above the liquid layer of the second liquid, the gas in fluid communication with the gas inlet/outlet; and a pump in fluid communication with the liquid inlet/outlet of the pressure vessel, whereby the first liquid can be pumped or returned to/from storage into or out of the pressure vessel.
Abstract:
A pressure vessel refuelling system enables fast fill refuelling of CNG fuel tanks by inducing a stratification of gas temperatures inside a tank during refuelling, then re-cycling a portion of the relatively warmer gas out of the tank during refuelling and back to a gas chiller. The system includes a pressure vessel having a lower end, a first gas port and a second gas port, wherein the second gas port is positioned above the lower end of the pressure vessel; and a cooling circuit connecting the first gas port with the second gas port; whereby gas flowing from an interior cavity of the pressure vessel through the second gas port is cooled in the cooling circuit before returning to the pressure vessel through the first gas port; and whereby a temperature of gas inside the pressure vessel varies from a first temperature at a level of the lower end of the pressure vessel to a second temperature, which is higher than the first temperature, at a level of the second gas port.
Abstract:
An improved vehicle fuel system enables mixing of natural gas and a liquid fuel upstream of a combustion cylinder. According to some embodiments the system includes: a gas pressure vessel and associated gas pressurisation system to deliver natural gas at a desired pressure; a liquid fuel storage vessel and associated reservoir pump to deliver liquid fuel at a desired pressure; a mixing system configured to receive and mix the liquid fuel from the liquid fuel storage vessel and natural gas from the gas pressure vessel to produce a homogeneous fluid fuel mixture; and a common rail system connecting the mixing system to an engine that consumes the homogeneous fluid fuel.
Abstract:
A pressure vessel refuelling system enables fast refuelling of Compressed Natural Gas (CNG) fuel tanks. The system includes a pressure vessel having a gas inlet/outlet port and a liquid inlet/outlet port; a first liquid at least partially filling the pressure vessel; a liquid layer of a second liquid floating on top of the first liquid, wherein the second liquid is immiscible with the first liquid; a gas at least partially filling the pressure vessel above the liquid layer of the second liquid, the gas in fluid communication with the gas inlet/outlet; and a pump in fluid communication with the liquid inlet/outlet of the pressure vessel, whereby the first liquid can be pumped or returned to/from storage into or out of the pressure vessel.