A NEW METHOD FOR DIRECT EXCHANGE AREA CALCULATION IN ZONAL METHOD OF RADIANT HEAT TRANSFER MODELING IN COMBUSTION FURNACES

摘要

A new method based on the discrete transfer modeling technique for calculating the direct exchange areas (DEA) in zonal methods of radiation heat transfer is presented. The key feature of this method is a fast DEA matrix evaluation. The computational time was found to be short in comparison to other methods for direct exchange areas calculation based on numerical quadrature integration. The accuracy of the procedure is assessed by comparing the predictions with those based on the numerical integration for a test case (IFRF furnace).