Method and device for supplying gas under pressure

Details Method and device for supplying gas under pressure Method and device for supplying gas under pressure

1994-12-23

1998-04-21

Voeltz, Emanuel T.

Boots, shoes, and leggings

364510, 73 1G, 73 3, G01F 338

Patent

active

057425230

ABSTRACT:
A device for delivering through a pipe a mass of a selected gas close to a selected predetermined mass value m, to a system at a predetermined working pressure P0 substantially greater than 100 bars according to the present invention incorporates a vessel of known volume V0, fitted with an inlet valve and with an outlet valve that is operatively connected to control passage through the pipe. A volume of a selected gas is injected into the vessel until a pressure of the gas in the vessel reaches a predetermined initial high pressure P1 with the initial high pressure P1 being greater than the working pressure P0. A temperature T of the gas in the vessel and the pressure of the gas in the vessel are measured, and a calculated pressure P2 is calculated using a formula: ##EQU1## wherein the volume of the vessel is substantially greater than a volume of the mass m at the working pressure P0 and the initial high pressure P1 is greater than the working pressure P0. The measured temperature T and the calculated pressure P2 of the gas in the vessel are then stored in memory. The outlet valve is afterwards opened until the pressure of the gas in the vessel reaches the pressure P2 and for closing the outlet valve when the pressure P2 is reached. The temperature T of the gas in the vessel is maintained at a substantially constant value when the outlet valve is open.

REFERENCES:
patent: 4829449 (1989-05-01), Polesnak
patent: 5220515 (1993-06-01), Freerks
patent: 5411685 (1995-05-01), Burgis

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