System and method for testing flow characteristics of gas fuel control valves for gas turbines

Abstract

The invention discloses a gas fuel control valve flow characteristic testing system and method for a combustion gas turbine, and the system comprises a gas incoming pipe and a gas outgoing pipe, which are connected to a tested control valve. The gas incoming pipe is sequentially provided with a gas supply pressure regulating valve, a temperature measurement device I and a pressure measurement device I. The gas supply pressure adjustment valve is connected with a compressed air pipe, and the temperature measurement device I is connected with a gas inlet end of the tested control valve. One side of the gas outgoing pipe is provided with a pressure measurement device II, a flow meter, a temperature measurement device II, and a back pressure regulating valve. The pressure measurement device I is connected with the gas outlet end of the tested control valve, and the back pressure regulating valve is close to a gas exhaust port end. The system and method achieve the testing of the flow characteristics of a gas fuel control valve, and effectively solve a problem of the precise calibration of the flow characteristics of the gas fuel control valve. The method can provide a testing and experiment solution for the domestic scientific research of the gas fuel control valve.

Description

technical field [0001] The invention belongs to the technical field of gas turbines, and in particular relates to a flow characteristic test system and method of gas fuel control valves for gas turbines. It is suitable for the two working states of the tested valve, critical and subcritical, and the method of adjusting the back pressure of the tested valve to change the working state of the tested valve to realize the accurate calibration of the flow characteristics of the tested valve. Background technique [0002] At present, almost all gas fuel flow control valves for domestic gas turbines with a power level above 10MW are imported products. The wide variation range makes it difficult to accurately measure the flow rate, so it is impossible to complete a special flow characteristic calibration test. After the valve is installed, it is necessary to test the flow characteristic of the valve through unit debugging on the unit, which is relatively risky and expensive. [000...

AI Technical Summary

Problems solved by technology

Usually, from start-up to rated load state of a gas turbine, the mass flow rate of the fuel varies from dozens of times to nearly a hundred times, while the gas flow meter’s accurate measurement range is usually only a dozen times, so the precise adjustment and measurement of the flow rate are brought to the fore. come very difficult

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