Heat Balance Calculation of a Turbo-charged Marine Boiler

Heat balance calculation is a basis for the thermodynamic performance calculation of turbo-charged marine boilers.As the turbo-charger unit participates in the thermodynamic process of the boiler,there may result a more complicated heat balance calculation of the turbo-charged marine boiler.A sectionalized calculation method is proposed for the heat balance calculation of the turbo-charged boiler along with an analysis and exploratory study of the direct heat-balance and sectionalized heat-balance calculation method.A general heat-loss formula applicable to the variable load calculation of the turbo-charged boiler is presented. A calculation formula of available heat quantity for fuel used to do work in an auxiliary steam turbine is given and a calculation and analysis of specific cases also performed.The sectionalized heat-balance calculation results are relatively satisfactory,thus providing a guide for the performance calculation and analysis of the turbo-charged marine boilers.