Empirical energy characteristic of a fluidized-bed boiler based on measurements from a distributed control system

Abstract

Identification of empirical characteristic of power efficiency of multi-fuel fluidized-bed boiler CFB-Compact co-fired with hard coal, low-grade coal and biomass has been carried out. Measurement data from a distributed control system (DCS) of the boiler have been used. Thermal power of the boiler, molar fraction of oxygen in flue gases as well as part of the low-grade coal and part of the biomass chemical energy in the total chemical energy of the fuel have been assumed as independent variables in the empirical characteristics of the boiler power efficiency. The second-degree polynomial has been applied for an output mathematical form of the empirical characteristics of the boiler efficiency. For identification the estimators of the empirical characteristics coefficients the stepwise regression method has been used. The final conclusions has been formulated.