A method for measuring the efficiency of an independent condensing steam-driven induced draft fan

Abstract

A method for measuring the efficiency of an independent condensing steam-driven induced draft fan includes a steam-driven induced draft fan, a small steam turbine, a condenser, a temperature measurement point, a pressure measurement point, a flow measurement point, and the like. The invention studies the steam-driven induced draft fan, the small steam turbine and the condenser as a whole, calculates the exhaust enthalpy of the small steam turbine based on the thermodynamic method, and finally obtains the efficiency of the steam-driven induced draft fan. The required measurement parameters are few, the measurement cost is low, and the measurement error has little influence on the results. Only need to measure: the gas dynamic pressure, static pressure, and temperature at the inlet of the steam-driven induced draft fan, and the static pressure and temperature of the gas at the outlet of the steam-driven induced draft fan. Steam turbine inlet pressure and temperature, condenser circulating water inlet pressure, temperature and flow rate, condenser circulating water outlet pressure and temperature, hot well condensate water temperature, pressure and flow rate. In order to fully understand the performance of the independent condensing steam-driven induced draft fan, provide a reliable basis for guiding the economical and safe operation of the steam-driven induced draft fan, and put forward reasonable suggestions and improvement directions for future economic operation.

Description

technical field [0001] The invention belongs to the field of power station boilers and steam turbine systems, and particularly relates to a method for measuring the efficiency of an independent condensing steam-driven induced draft fan. Background technique [0002] The power station boiler induced draft fan is one of the most important auxiliary machines of the boiler. Axial-flow induced draft fan is generally used in large power station boilers. As a result, the size of the boiler induced draft fan continues to increase, and its proportion in the power consumption rate of the plant is also further increased. my country's self-developed and imported from abroad power plant boiler fan technology products continue to emerge. However, it is almost impossible to carry out full-scale tests in the manufacturing plant. Therefore, it is more necessary and important to evaluate the performance of the induced draft fan in the actual system on site. [0003] There are two main types...

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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