Fuel reduction rate output system, fuel reduction rate output method, and fuel reduction rate output program

摘要

To calculate a fuel reduction rate acquired by improvement of controllability of a boiler in real time.SOLUTION: A fuel reduction rate output system 1 which calculates a fuel reduction rate 15 related to fuel reduction correspondence applied to a boiler combustion control system 4 includes: a deviation determination unit 11 for recording history of a measurement main steam pressure PV as main steam pressure history 14, for calculating deviation of the main steam pressure history 14 and the measurement main steam pressure PV, and for outputting the history of the main steam pressure in which the deviation is in a predetermined range as the history of the control main steam pressure; a standard deviation calculation unit 12 for calculating standard deviation on the basis of the history of the control main steam pressure outputted by the deviation determination unit 11; and a fuel reduction rate output unit 13 for calculating a standard deviation improvement rate on the basis of the standard deviation calculated by the standard deviation calculation unit 12, and for calculating and outputting the fuel reduction rate 15 on the basis of a reference expression showing the relation between the standard deviation improvement rate and the fuel reduction rate.SELECTED DRAWING: Figure 1