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ISSN Online: 2377-424X

International Heat Transfer Conference 12
August, 18-23, 2002, Grenoble, France

Comparison of the Predictions from a Range of Multi-Zone Mathematical Models of a Continuously Operated Metal Reheating Furnace

Get access (open in a dialog) DOI: 10.1615/IHTC12.3570
7 pages

摘要

The zone method can provide accurate estimates of thermal radiation heat transfer and as such has been widely used to determine the performance of industrial combustion systems. This paper compares predictions from a range of both one-dimensional (the so-called long furnace) and more complex two-dimensional models of a gas-fired metal reheating furnace. There are substantial differences in the predictions of the two different types of models with the simpler one-dimensional version over predicting both the load surface temperature and the temperature differentials in the steel at discharge from the furnace, as well as overestimating the thermal efficiency. Consequently it may be necessary to use two-dimensional zoning arrangements unless the flow of combustion products can be represented by a simple plug flow. In addition the effect of the number of zones is studied for the two-dimensional models.