US4584868A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for determining the supercompressibility factor of a flowing gas
Assignee: Elster American Meter Co LLC
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Filing: 1985-05-16
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Granted: 1986-04-29
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Expires: 2005-05-16
Abstract
Abstract An arrangement for determining the supercompressibility factor of a flowing gas at elevated pressure includes a first meter for measuring the volume flow rate of the gas at the elevated pressure, a restrictor at the outlet of the first meter for dropping the pressure of the gas to a pressure at which the supercompressibility factor is known, and a second meter for measuring the volume flow rate of the gas at the lower pressure. A computer calculates the supercompressibility factor of the gas at the elevated pressure by utilizing measured values of temperature, pressure and volume flow rate of the gas at both the elevated and lower pressures.
Inventors
- 👤 Robert S. Jacobsen
- 👤 George W. Schneider, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:48
CPC Classifications
G; G01; G01L; G01L7/00; G01N; G01N7/00; G01F; G01F1/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
141 words
An arrangement for continuously determining the supercompressibility factor (Z 1 ) of a gas at an elevated pressure (P 1 ), comprising: means for dropping the pressure of said gas to a lower pressure (P 2 ) at which the supercompressibility factor (Z 2 ) of said gas is known; means for measuring the volume (V 1 ) of said gas at said elevated pressure; means for measuring the temperature (T 1 ) of said gas at said elevated pressure; means for measuring said elevated pressure (P 1 ); means for measuring the volume (V 2 ) of said gas at said lower pressure; means for measuring the temperature (T 2 ) of said gas at said lower pressure; means for measuring said lower pressure (P 2 ); and means for calculating said elevated pressure supercompressibility factor using the formula ##EQU5##
Claim 2
Dependent Claim
141 words
An arrangement for continuously determining the supercompressibility factor (Z 1 ) of a gas at an elevated pressure (P 1 ), comprising: means for dropping the pressure of said gas to a lower pressure (P 2 ) at which the supercompressibility factor (Z 2 ) of said gas is known; means for measuring the volume (V 1 ) of said gas at said elevated pressure; means for measuring the temperature (T 1 ) of said gas at said elevated pressure; means for measuring said elevated pressure (P 1 ); means for measuring the volume (V 2 ) of said gas at said lower pressure; means for measuring the temperature (T 2 ) of said gas at said lower pressure; means for measuring said lower pressure (P 2 ); and means for calculating said elevated pressure supercompressibility factor using the formula ##EQU5##
Claim 3
Dependent Claim
14 words
The arrangement according to claim 1 wherein said pressure dropping means comprises a restrictor.
Claim 4
Dependent Claim
21 words
The arrangement according to claim 1 further including means for raising the temperature of said lower pressure gas to ambient temperature.
Claim 5
Dependent Claim
16 words
The arrangement according to claim 3 wherein said temperature raising means includes a finned heat exchanger.
References Cited (Backward Citations)
US3701280A
Cited
US4390956A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-04-28 | 1989-10-28 | 1990-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-28 | 1993-10-28 | 1994-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-28 | 1997-10-28 | 1998-04-29 | $7700.00 | Window Closed / Lapsed |