WATER VAPOR CONTENT IN THE NATURAL GAS MEASURING METHOD AND SYSTEM Russian patent published in 2019 - IPC G01N21/39 

FIELD: measurement technology.

SUBSTANCE: group of inventions relates to the field of gases analysis. Water vapor content in the natural gas measuring method and the system for its implementation include recording, using diode laser spectroscopy, of the natural gas sample in the analytical cell analytical absorption spectrum and the reference gas in the reference cell reference absorption spectrum. Measuring the natural gas sample in the analytical cell temperature and pressure, and recording the analytical and reference absorption spectra in the spectrum working region of about 940 nm, for which only the water absorption band is observed. Recorded the analytical spectrum using the multiple-pass analytical cell. As the reference gas the pure water vapor is used. By the reference absorption spectrum determining the wavelengths in the spectrum working region absolute scale. For the natural gas sample temperature and pressure measured values, calculating the water vapor in the analytical cell single concentration absorption spectrum. Using the least squares method, by the water vapor single concentration calculated absorption spectrum, determining the desired water vapor concentration in the natural gas sample in the selected measurement units as the analytical absorption spectrum in the absolute wavelength scale linear regression coefficient.

EFFECT: reducing the water vapor content in the natural gas measurements time, the measurement system simplification, increase in its reliability, enabling high measurement accuracy and the measured values range expansion.

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