Abstract
In Reducing energy consumption and increasing energy efficiency have long been very important issues affecting all sectors of energy consumption, including the industrial sector. Industrial furnaces have a significant energy consumption that needs to be optimised, but before that an analysis of the energy situation is necessary. This article discusses the energy state analysis of a burner system, which was performed using CFD model. Specifically, the analysis of the combustion process in a radiant tube, for which a 3D model of this tube was created. The analysis also addressed the subsequent heat transfer from the surface of the radiant tube in the power range of 50-109 kW. Input parameters and model conditions were defined based on the parameters of the real burner system. The CFD modelling performed showed that as the fuel consumption increased, the radiant tube power increased and at the same time the flue gas temperature also increased. The heat flux from the tube surface was slightly different on both sides of the tube, which was due to the flame tilt inside the radiant tube.
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