Calculations of Gas and Grate Boilers Combustion Chambers - Verification of Methods Based on Measurement Data of Actual Boilers

In the paper the comparison of the results of analytical methods for determining the temperature at the outlet from the furnace, based on the design and measurement data of the industrial boilers is presented. The comparison is done on WR10 and WR40 grate boilers as well as OG55 gas boiler. The calculations of the furnaces are based on different assumptions. Some of the methods described in the literature on the subject have been developed based on the operating data of large power boilers. In Poland, the most frequently used method is the normative method from 1973. This method is in fairly good agreement with the results obtained during the warranty tests of real units. However, it is not the most up-to-date edition of this methodology. The results of the analysis of the discussed boilers indicate that the normative methods are characterized by the best degree of convergence with the temperature values obtained directly from the measurements of these units.