Measuring a gas mass fraction
US6612187B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 23, 2000 |
| Grant date | Sep 2, 2003 |
| Priority date | — |
| Expiry date | Oct 23, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F1/74
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method of measuring a gas mass fraction (X) in a mass of liquid and gas flowing in direction (A) along pipeline (2) which includes a venturi formed by throat (10), convergent portion (12) and divergent portion (14). Adjacent the venturi (12, 10, 14) but upstream is a flow conditioner (28) creating a uniform mixture of gas and liquid downstream so as to reduce or avoid slip between the gas and liquid phases in the venturi. Differential pressure (DP1) is measured between a position upstream of the flow conditioner and a position intermediate the flow conditioner and venturi. Differential pressure (DP2) is measured between the throat and a position intermediate the flow conditioner and venturi. Differential pressure (DP3) is measured across the venturi. Computer (50) calculates the gas mass fraction (X) using a formula that may take the form: X=a·(DP1)b·(DP2)c·(DP3)d·(DP2−DP3)e·(DP1+DP3)f, in which a, b, c, d, e and f are constants.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.