Based on the test data of air preheater bypass excess heat utilization system with generalized regenerative mechanism of a 600 MW unit

according to the EU standard and the national standard

the calculation matching system for boiler efficiency/heat consumption/coal consumption of the turbine-boiler coupling system is investigated

and its influence on the calculation of standard coal consumption in power plants is analyzed. By combining the principle of heat input-output conservation with anti-equilibrium

and through case study

the feasibility and shortcomings of the current boiler calculation specifications are verified. A new model of boiler efficiency/unit heat consumption/coal consumption matching system is derived

through which the boiler efficiency and turbine benefits can be more intuitively reflected in the turbine-boiler coupled heat utilization system

and can be used to evaluate the change of hot air temperature. Moreover

some theoretical and practical problems that need to be studied and clarified in the calculation of boiler efficiency

coal consumption

pipe efficiency

plant power consumption rate and standard coal consumption in heat utilization system with heat input-output process are also discussed.