FIELD: applied physics.
SUBSTANCE: invention relates to applied physics, namely to the field of determining the mass flow rate of wet steam in the steam line from the steam generator, and can be used in steam generators of thermal power plants and nuclear power plants. A method for determining the mass flow rate of wet steam in a steam pipeline from a steam generator includes: measurement of static pressure and pressure drop in the steam pipeline on two of its receivers, the window of one of which is open towards the flow, and the window of the other is in the direction of flow movement; determination of the density of the vapor phase by static pressure; measurement of the degree of dryness of wet steam and the mass flow rate of the steam generator feed water. At the interval of the stable state of the measured values, the values of the degree of dryness of steam and the mass flow rate of the feed water are registered; the determination of a fixed value of the mass flow rate of wet steam by a fixed value of the mass flow rate of the feed water; calculation of a fixed value of the conversion function based on a fixed value of the mass flow rate of wet steam, the current value of the density of its vapor phase, the current value of the pressure drop and the value of the cross section of the steam pipe. Also, the first flow boundary is calculated: according to the current values of the vapor phase density and pressure drop, as well as the fixed value of the conversion function and the value of the cross section of the steam line; calculation of the second flow boundary: by the current values of the vapor phase density and pressure drop, the fixed value of the conversion function, the value of the steam pipe cross section, as well as by the fixed and current values of the degree of dryness; determination of the wet steam mass flow rate by the sum of the current values of the second flow boundary with an empirically determined fraction of the difference between the current values of the first and second flow boundaries.
EFFECT: increase in the accuracy of determining steam parameters.
1 cl, 1 dwg
