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US4783168A
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Method of determining a physical property of a medium
Assignee: NV NEDERLANDSE GASUNIE LAAN CORPUS DEN HOORN 102 9728 JR GRONIGEN NETHERLANDS A CORP OF NETHERLANDS
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Filing: 1987-04-20
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Granted: 1988-11-08
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Expires: 2007-04-20
Abstract
Abstract Method of determining a physical property of a medium, especially natural gas, comprising a qualitative and a quantitative analysis in which the components and the specific gravity of the medium and the specific gravities and weight fractions of the components are determined and the property to be determined is calculated with a formula known per se, at least one weight fraction being determined by Raman spectrometry.
Inventors
- 👤 Onno Florisson
- 👤 Geert E. H. Joosten
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:01
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/62; G01N21/63; G01N21/65; G01N33/00; G01N33/22; G01N33/225
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
107 words
Method of determining the calorific value of a medium, comprising the steps of: determining the specific gravity of the medium; measuring the respective concentrations of various components and determining their identity within the medium using Raman spectrometry, calculating the calorific value of the medium according to the equation ##EQU8## wherein H is the calorific value of the medium in MJ/m 3 , C i is the weight fraction of a particular component in %, H i is the calorific value of a particular component in MJ/kg, p i is the specific gravity of a particular component in Kg/m 3 , and n is the number of components.
Claim 2
Dependent Claim
107 words
Method of determining the calorific value of a medium, comprising the steps of: determining the specific gravity of the medium; measuring the respective concentrations of various components and determining their identity within the medium using Raman spectrometry, calculating the calorific value of the medium according to the equation ##EQU8## wherein H is the calorific value of the medium in MJ/m 3 , C i is the weight fraction of a particular component in %, H i is the calorific value of a particular component in MJ/kg, p i is the specific gravity of a particular component in Kg/m 3 , and n is the number of components.
Claim 3
Dependent Claim
17 words
Method according to claim 1, characterized in that the gross calorific value of the medium is determined.
Claim 4
Dependent Claim
24 words
Method according to claim 2, characterized in that the gross calorific value of each individual phase of which the medium is composed is determined.
References Cited (Backward Citations)
US3950101A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-11-08 | 1992-05-09 | 1992-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-11-08 | 1996-05-09 | 1996-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-11-08 | 2000-05-09 | 2000-11-08 | $7700.00 | Window Closed / Lapsed |