Calculation method and device for influence of ambient temperature change on coal consumption of coal-fired generating units

Abstract

The invention provides a method and device for calculating influences of changes of the environment temperature on coal consumption of a coal-fired power generation unit. The method includes the steps of obtaining the temperature of air at an inlet of an air pre-heater and the temperature of smoke at the inlet of the air pre-heater at the set environment temperature T, and calculating the temperature (please see the specification) of furnace exhaust smoke according to the temperature of the air at the inlet of the air pre-heater and the temperature of the smoke at the inlet of the air pre-heater; calculating the change amount deltaq<2> of heat losses of the furnace exhaust smoke according to the temperature (please see the specification) of the furnace exhaust smoke; obtaining the backpressure based on the influences of the environment temperature on the backpressure; finding a turbine backpressure correction curve according to the backpressure, and obtaining a difference value deltaH<R> between practical heat losses H<R> at the backpressure and design heat losses H<RTHA>; calculating the total quantity deltab of the influences of the environment temperature on the coal consumption of the unit according to the change amount deltaq<2> of the heat losses of the furnace exhaust smoke and the difference value deltaH<R>. By means of the method and device, the influences of the changes of the environment temperature on the coal consumption of the coal-fired power generation unit can be quantitatively calculated, the external condition deviation can be accurately calculated, and then the final energy efficiency level of the power generation unit can be researched.

Description

technical field [0001] The invention relates to a coal consumption analysis technology of a coal-fired generating set, in particular to a calculation method and a device for calculating the influence of ambient temperature changes on the coal consumption of a coal-fired generating set. Background technique [0002] As the society's demand for electricity is getting higher and higher, how to improve the power generation efficiency of generator sets has become a problem that people pay attention to. [0003] For a certain generator set, the final energy efficiency level it can achieve depends on three factors, namely: the design and manufacturing level of the generator set; the application conditions of the generator set; management application level. The management application level of the manager to the generator set is a subjective factor of the unit operation, which can be improved through the improvement of the operation management. The design and manufacturing level of...

AI Technical Summary

Problems solved by technology

In the existing technology, there has not been any analysis technology about the impact of ambient temperature changes on the coal consumption of coal-fired generating units

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