Thermal Analysis in an Intermittent Kiln with Thermal Insulation: An Experimental Design Approach

Abstract:

The main purpose of this work is to evaluate the influence of the thickness and thermophysical properties of insulating materials on the maximum external surface temperature and energy gain provided for an intermittent ceramic kiln operating with natural gas as fuel. To evaluate the influence of independent variables on response variables, a factorial experimental design was developed. From the analysis of variance (ANOVA), it was possible to determine significant and well-adjusted mathematical models for both response variables. It was verified that the thickness and thermal conductivity of thermal insulation are the independent variables that have the greatest influence on the process efficiency.

• Periodical: Diffusion Foundations (Volume 27)
• Pages: 99-112
• DOI: https://doi.org/10.4028/www.scientific.net/DF.27.99
• Online since: May 2020
• Authors: Ricardo Soares Gomez, Antonio Gilson Barbosa de Lima*, T.R. Nascimento Porto, Hortência Luma Fernandes Magalhães, Michelly Dayane Araújo de Almeida, João de Mélo Vieira Neto, Loredanna Melyssa Costa de Souza
• Keywords: Ceramic Material, Drying, Energy, Firing, Thermal Efficiency

References

[1] D.R. Dinger, Practical pointers for ceramists, Vol. 1.; C B Dinger, (2010).

[2] W.D. Kingery, Factors affecting thermal stress resistance of ceramic materials, J. Am. Ceram. Soc., 38(1) (1955) 3–15.

[3] T. Defraeye, Advanced computational modelling for drying process – A review, Appl. Energy, 131 (2014) 323-344.

DOI: 10.1016/j.apenergy.2014.06.027

[4] D.A. Brosnan, G. C. Robinson, Introduction to drying of ceramics: With Laboratory Exercises; American Ceramic Society, Westerville, (2003).

[5] J.S. Reed, Principles of ceramics processing, second ed., Wiley, New York, (1995).

[6] A. Mezquita, J. Boix, E. Monfort, G. Mallol, Energy saving in ceramic tile kilns: Cooling gas heat recovery. Appl. Therm. Eng., 65(1–2) (2014) 102–110.

DOI: 10.1016/j.applthermaleng.2014.01.002

[7] T.L. Bergman, F.P. Incropera, D.P. Dewitt, A.S. Lavine, Fundamentals of heat and mass transfer, 7th ed., Wiley, New York, (2011).

[8] W.H. Chen, Y.C. Chung, J.L. Liu, Analysis on energy consumption and performance of reheating furnaces in a hot strip mill, Int. Commun. Heat Mass Transf., 32(5) (2005) 695–706.

DOI: 10.1016/j.icheatmasstransfer.2004.10.019

[9] B. Hadała, Z. Malinowski, M. Rywotycki, Energy Losses from the Furnace Chamber Walls during Heating and Heat Treatment of Heavy Forgings. Energy, 139 (2017) 298–314.

DOI: 10.1016/j.energy.2017.07.121

[10] R.S. Gomez, T.R.N Porto, H.L.F. Magalhães, G. Moreira, A.M. André, R.B.F. Melo, A.G.B. Lima, Natural gas intermittent kiln for the ceramic industry: A transient thermal analysis. Energies, 12(8) (2019) 1568.

DOI: 10.3390/en12081568

[11] H.K. Versteeg, W. Malalasekera, An introduction to computational fluid dynamics, The Finite Volume Method, second ed., Pearson Education Limited, Harlow, (2007).

[12] S.W. Churchill, H.H.S. Chu, Correlating equations for laminar and turbulent free convection from a vertical plate. Int. J. Heat Mass Transf., 18(11) (1975) 1323–1329.

DOI: 10.1016/0017-9310(75)90243-4

[13] I.B. Celik, U. Ghia, P.J. Roache, Procedure for estimation and reporting of uncertainty due to discretization in CFD applications. ASME J. Fluid Eng, 130(7) (2008).

[14] M.I. Rodrigues, A.F. Iemma, Experiment design and process optimization, second ed., Cárita Spiritist Editor, Campinas, 2009. (In Portuguese).