SU1545030A1 - Method of controlling the flow rate of cooled medium - Google Patents

Abstract

This invention relates to a power system. Can be used in disposal systems for combustion products. Allows to increase the accuracy of adjustment. To achieve this goal, two dynamic heads of the cooled medium are measured as it moves in the direction from the source to the discharge duct and from the outlet duct to the source, and with increasing the first dynamic head they increase the flow rate of the cooled medium in the working duct and consumption in the working gas duct. 1 il.

Description

The invention relates to a power system and can be used in systems for the disposal of combustion products.

The aim of the invention is to improve the accuracy of regulation. . The drawing shows a block diagram of a device that implements the method.

The device contains sensors 1 and 2 of dynamic pressures installed on the bypass duct 3, comparison unit 4, flow medium controller 5 supplied from source 6 through working duct 7 through heat exchanger 8 to common exhaust duct 9 and chimney 10.

The adjustment method is as follows.

The cooled medium from the source 6 by means of an exhaust fan passes through the heat exchanger 8, the common bypass duct 9 and through the chimney 10 enters the atmosphere.

The dynamic head of the flow of the cooled medium in the bypass duct 3 is measured by sensors 1 and 2, the measurement results are received in comparison unit 4, the resulting signal of which is controlling for regulator 5.

In the steady-state mode, the flow rate of the cooled medium in the bypass duct 3 is absent, dynamic pressures measured by sensors 1 and 2 are zero, and the control signal from block 4 does not arrive at comparison with controller 5.

When the flow rate of the cooled medium from the source 6 increases, a portion of the cooled medium flows into the common exhaust gas duct 9 through the bypass gas duct 3 and the dynamic head of the flow measured by the sensor 1 enters the comparison unit 4. Resp

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The resulting control signal from the comparison unit A is fed to the controller 5 and causes the smoke maker to open further, increasing the flow rate of the cooled medium through the heat exchanger and reducing the flow through the bypass duct to a zero dynamic head measured by the sensor 1.

When the flow rate of the cooled medium from the source 6 decreases, a part of the cooled medium from the common bypass gas 9 flows through the bypass gas supply 3 to the heat exchanger 8 and the dynamic pressure measured by the sensor 2 enters the comparison unit. The resulting control signal from the comparison unit calls the valve cover and reduces the flow rate of the cooled medium through the heat exchanger and reduces the flow of the cooled medium through the bypass gas 3 to the zero dynamic head measured by the sensor 2.

Claims (1)

The invention provides an increase in the reliability of operation of the cooling medium removal system by controlling and maintaining the zero flow rate of the cooled medium "jcp0 bypass duct" without disconnecting device. Invention Formula The method of controlling the flow rate of the cooled medium, including the change in its flow rate in the working gas duct according to the value of the parameter measured on the bypass gas duct, characterized in that, in order to improve the control accuracy, two dynamic pressures of the cooled medium are measured as it moves from the bypass duct and from the bypass duct to the source; moreover, with an increase in the first dynamic head, the flow rate of the cooled medium in the working duct is increased, and with an increase in the second dynamic of the pressure reducing its consumption in the working duct.