Effects of Design Parameters for Clay Brick Kiln Using Computational Fluid Dynamics and Experimental Design

Abstract:

One of the most critical steps in brick making is firing, performed to harden the bricks. In a typical non-industrial setting, many pieces of extruded clays are stacked into a box-shaped kiln with equally-spaced rectangular vertical holes and another set of equally-spaced horizontal holes at the bottom across two sides. Roman roof tiles are used to cover the vertical sides, while leaving the horizontal holes opened, to complete the kiln assembly. Rice husk is filled in the holes of the kiln and is used as the fuel for firing. However, approximately 10% of the bricks, stacked conventionally, are always not appropriately fired. Therefore, this research aimed at simplifying model and redesigning the clay brick kiln using three-dimensional computational fluid dynamics (CFD). The studied parameters for 2³ factorial designs were as follows: kiln height (200 – 225 cm), horizontal holes width (7.5 – 15 cm) and height (45 – 60 cm). The total volume of brick stack, averaged steady-state temperature and time to reach a steady-state temperature were selected as the response parameters. The analysis of variance (ANOVA) of 2³ factorial design showed that the width and height of holes affected the time to reach steady-state but the averaged steady-state temperature and the total volume of brick stack were dependent on all 3 parameters. Then, a kiln was constructed according to the model with the maximum number of bricks and only 4% of the bricks were not appropriately fired.

• Periodical: Advanced Materials Research (Volume 1101)
• Pages: 51-56
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1101.51
• Online since: April 2015
• Authors: W. Ratanathavorn, S. Charoenjai, Sutas Janbuala, B. Chalermsinsuwan, K. Poochinda
• Keywords: Clay Brick, Computational Fluid Dynamics, Design Parameter, Experimental Design, Firing, Kiln

References

[1] J. Sun, L. Fang, J. Han, Optimization of concrete hollow brick using hybrid genetic algorithm combining with artificial neural networks, International Journal of Heat and Mass Transfer 53 (2010) 5509–5518.

DOI: 10.1016/j.ijheatmasstransfer.2010.07.006

[2] Z. Khatir, J. Paton, H. Thompson, N. Kapur, V. Toropov, M. Lawes, D. Kirk, Computational fluid dynamics (CFD) investigation of air flow and temperature distribution in a small scale bread-baking oven, Applied Energy 89 (2012) 89–96.

DOI: 10.1016/j.apenergy.2011.02.002

[3] V.A.F. Costa, Improving the thermal performance of red clay holed bricks, Energy and Buildings 70 (2014) 352–364.

DOI: 10.1016/j.enbuild.2013.11.052

[4] C. Yang, C. Cui, J. Qin, X. Cui, Characteristics of the fired bricks with low-silicon iron tailings, Construction and Building Materials 70 (2014) 36–42.

DOI: 10.1016/j.conbuildmat.2014.07.075

[5] S. Janbuala, The Development of Composition for Bricks Products of Ayuttaya and Angthong Province, Suan Dusit Graduate School Academic Journal 5(2012) 13-21.

[6] ANSYS FLUENT, ANSYS FLUENT 6. 3 Documentation, [Online]. Available: http: /aerojet. engr. ucdavis. edu/fluenthelp/html/ug/node903. htm, (2006).

[7] I. Frank P., D. David P., B. Theodore L. and L. Adrienne S., Fundamentals of heat and mass transfer, John Wiley, United States of America, (2007).

[8] C. Douglas Montgomery, Design and Analysis of Experiments, John Wiley & Sons, New York, (2001).