System for metering gas supplied under high pressure

Details System for metering gas supplied under high pressure System for metering gas supplied under high pressure

1994-07-11

1996-09-17

Chilcot, Richard

Measuring and testing

Volume or rate of flow

With indirect temperature or density compensation

73199, G01F 186

Patent

active

055570500

ABSTRACT:
A metering system, for metering a volume V.sub.o of compressed gas supplied under high pressure from a first tank to a second tank, includes a first duct for supplying the compressed gas from the first tank to the second tank, the first duct having a pressure regulator providing a relatively high driving pressure P, and a first nozzle having a section S with an inner diameter located downstream of the pressure regulator and providing a downstream pressure p therefrom, the pressure regulator being controlled by the downstream pressure p to maintain driving pressure P so that the downstream pressure p remains less than 0.95 P. A second duct branches at one end from the first duct between the pressure regulator and the first nozzle and includes a second nozzle having a section s with an inner diameter smaller than the inner diameter of the section S of the first nozzle. An outlet of the second nozzle is maintained under relatively low pressure conditions, and a volume meter is connected to the outlet of the second nozzle for metering under low pressure conditions a volume v.sub.o of gas flowing through the second duct. The volume V.sub.o which flows to the second tank under such low pressure conditions is determined by V.sub.o =v.sub.o (S/s).

REFERENCES:
patent: 2862387 (1958-12-01), Webster
patent: 3750472 (1973-08-01), Ducousset
patent: 4131015 (1978-10-01), Chawla et al.
patent: 4527600 (1985-07-01), Fisher et al.
patent: 4706492 (1987-11-01), Jones, Jr. et al.
patent: 5307833 (1994-05-01), Stoy et al.

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