Method and apparatus for measuring and providing corrected gas flow
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United States of America Patent
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May 9, 1989
Grant Date -
N/A
app pub date -
Feb 5, 1986
filing date -
Feb 5, 1986
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method and apparatus is disclosed for measuring flowing gas and at least one variable for calculating gas flow corrected to a base value of that variable. Illustratively, the measured variables are temperature and pressure, and devices are employed for measuring the temperature T.sub.f and pressure P.sub.f of the gas flowing through a conduit, and means in the illustrative form of a flow meter for measuring the volume V.sub.f of the gas flowing through the conduit. Calculating means in the illustrative form of a programmed microprocessor is employed to calculate the corrected gas volume to base conditions in accordance with an expression including the supercompressibility factor. The supercompressibility factor is calculated according to an equation involving only whole number exponentiation and a selected set of coefficients. The calculation means selects a particular set of these coefficients in accordance with indications of pressure and/or temperature.
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