Detailed Heat Transfer Modelling & Optimization of a Forced-Convection Kiln Using CFD Methods

Abstract:

The efficiency of many industrial processes is strongly governed by the 3D-flow conditions in the fluid domain. An important step in the production of special wires is the patenting in forced convection kilns. An unfavourable deviation in the distribution of key parameters (e.g. velocity and temperature) can be found in the material properties of the product later.The usage of CFD methods (Computational Fluid Dynamics) is an alternative capable approach to analyse the 3D-heat transfer process in the kiln in detail with less effort & costs. In the current improvement study a detailed CFD-modelling of two different forced convection kilns was done for a typical load case. Considering the detailed kiln geometries and important heat transport phenomena the initial situation in the heat transfer zone was analysed for each kiln.In a second step an improvement concept was developed by increasing the heat transfer into the wire as well as smoothing the flow distribution in the heating zone of the kiln. After revamping of the kilns a number of different improvements could be realized. Despite of the plant’s higher flexibility at different load cases a significant improvement of the wire’s product quality could be found. With respect to important key parameters the deviation of material properties could be reduced to >90%. In a next step a solid-fluid-coupling will be done in the CFD-approach which allows examining the developing temperature profile of each wire line in the kiln.

• Periodical: Key Engineering Materials (Volumes 651-653)
• Pages: 1525-1530
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.651-653.1525
• Online since: July 2015
• Authors: Hermann Maier*, Walter Berger, Robert Breyner
• Keywords: CFD, Flow Conditions, Heat Transfer, Kiln, Patenting, Wire

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