Method for measuring efficiency of independent condensing steam-driven induced draft fan

Abstract

The invention provides a method for measuring the efficiency of an independent condensing steam-driven induced draft fan. The method comprises a steam-driven induced draft fan, a small steam turbine,a condenser, a temperature measuring point, a pressure measuring point, a flow measuring point and the like. The steam-driven induced draft fan, the small steam turbine and the condenser are integrally researched, the exhaust enthalpy of the small steam turbine is calculated based on a thermodynamic method, and finally the efficiency of the steam-driven induced draft fan is obtained. The method has the advantages of few required measurement parameters, low measurement cost and small influence of measurement errors on results, and only needs to measure the dynamic pressure, static pressure andtemperature of inlet gas of the steam-driven induced draft fan, the static pressure and temperature of outlet gas of the steam-driven induced draft fan, the steam inlet pressure and temperature of thesmall steam turbine, the water inlet pressure, temperature and flow of circulating water of the condenser, the water outlet pressure and temperature of the circulating water of the condenser and thetemperature, pressure and flow of condensed water of a hot well. Therefore, the performance of the independent condensing steam-driven induced draft fan is comprehensively known, a reliable basis is provided for guiding the economical and safe operation of the steam-driven induced draft fan, and reasonable suggestions and improvement directions are provided for future economical operation.

Description

technical field [0001] The invention belongs to the field of power plant boilers and steam turbine systems, and in particular relates to a method for measuring the efficiency of an independent condensing steam-driven induced draft fan. Background technique [0002] Power plant boiler induced draft fan is one of the most important auxiliary machines for boilers. Large power plant boilers generally use axial flow induced draft fans. The size of the induced draft fan of the boiler continues to increase, and its proportion to the power consumption rate of the plant is further increased. At the same time, the requirements for the safety, reliability and economy of the induced draft fan of the power plant boiler are also getting higher and higher. my country's self-developed and imported power plant boiler fan technology products continue to emerge. However, it is almost impossible to conduct a full-scale test in the manufacturing plant because it requires too much money. Therefo...

AI Technical Summary

Problems solved by technology

However, the efficiency measurement of the independent condensing steam-driven induced draft fan is still a blank, because the output power of the small steam turbine cannot be directly and accurately measured, which affects the calculation accuracy of the efficiency of the induced draft fan and the economical safety of the steam-driven induced draft fan to a certain extent Evaluation

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