A Method for Calculating Thermal Efficiency Of the Solid Fuel Fired Boiler

This paper presents a simplified method for calculation of thermal efficiency of the solid fuel fired boiler on-line.Although this method simplifies complicated calculation and adopts some approximate calculation,it still includes almost all items of heat loss proposed in ASME PTC4(1),which makes it possible to replace the standard method to some degree. Besides,based on requirement of on-line calculation of thermal efficiency(2),the new method greatly reduces the number of parameters to be measured. At the end of the paper, the simplified method is proved to be practical by comparing the results of calculating efficiency with the two methods, i.e.the standard method specified in ASME PTC 4 and the simplified method proposed in this paper.