Back to results
US 8,136,414 B2Granted
Flow metering
OwnerRichard Steveninventor
Life of this patent
Estimating the term…
Abstract
An improved flow meter, which has diagnostic capabilities due to the reading of total pressure head loss, calculation of corresponding flow rate and comparison with flow rates calculated from other differential pressures.
Claims70
A method of metering flow through a fluid conduit, which comprises a fluid obstruction, comprising the steps of:
- measuring at least two differential pressures taken between at least three different conduit positions;
- wherein the at least two differential pressures are selected from:
- a total head loss differential pressure taken between a position upstream of the fluid obstruction and a position downstream of the fluid obstruction;
- a traditional differential pressure taken between the position upstream of the fluid obstruction and an intermediate position between the upstream and downstream positions;
- and
- a recovery differential pressure taken between the intermediate position and the downstream position;
- calculating a fluid flow rate using one of the differential pressure measurements, and monitoring the accuracy of this fluid flow rate calculation by examining the relationship between the measured differential pressures.
4 more elements
A flow metering apparatus comprising:
- a fluid conduit comprising fluid obstruction;
- a first pressure tapping at an upstream end of the fluid conduit;
- a second pressure tapping at a downstream end of the fluid conduit;
- an intermediate pressure tapping between the first and second pressure tappings;
- at least two DP transmitters arranged for reading the differential pressures between at least the three different conduit positions;
- wherein the at least two DP transmitters are selected from DP transmitters arranged to measure:
- a total head loss differential pressure taken between the first pressure tapping and the second pressure tapping;
- a traditional differential pressure taken between the first pressure tapping and the intermediate pressure tapping;
- and
- a recovery differential pressure taken between the intermediate pressure tapping and the second pressure tapping;
- and:
- a calculator for calculating a fluid flow rate using one of the differential pressure measurements, and monitoring the accuracy of this fluid flow rate calculation by examining the relationship between the measured differential pressures.
9 more elements
Dependencies are inferred from the claim text.