Heat Transfer in Industrial Furnaces. Final Report, April 1990-June 1994

摘要

Thermal system performance models for indirectly (radiant tube) and directly-fired industrial furnaces have been developed and validated against test data obtained on laboratory scale and operating industrial furnaces. These models are detailed in previous annual reports and open literature publications; therefore, they are not described here, but references are provided. A two-dimensional axisymmetric combustion/heat transfer model has been developed to predict turbulent flow, combustion, radiation and heat transfer in a natural gas-fired combustion system. Pollutant emissions from the system are calculated as a data post-processing step. The model is detailed in the report and has been applied to calculate the flame structure in a radiant tube and an industrial scale test furnace. The combustion/heat transfer model has also been applied to the 12 MW cylindrical furnace (end-fired) operated by John Zink, Tulsa, OK. The model predictions were compared against test data. The model was then used to study the effect of particle injection into the furnace on heat transfer to the walls and pollutant emissions. The detailed results are discussed in the body of the report.