CFD Analysis of Bubbling Fluidized Bed Using Rice Husk

  • Ravi Inder Singh
  • S. K. Mohapatra
  • D. Gangacharyulu

Abstract

Rice is Cultivated in all the main regions of world. The worldwide annual rice production could be 666million tons (www.monstersandcritics.com,2008) for year 2008. The annual production of rice husk is 133.2 million tons considering rice husk being 20% of total paddy production. The average annual energy potential is 1.998 *1012 MJ of rice husk considering 15MJ/kg of rice husk. India has vast resource of rice husk; a renewable source of fuel, which if used effectively would reduce the rate of depletion of fossil energy resources. As a result a new thrust on research and development in boilers bases on rice husk is given to commercialize the concept. CFD is the analysis of systems involving fluid flow, heat transfer and associated phenomena such as chemical reactions by means of computer-based simulation. High quality Computational Fluid dynamics (CFD) is an effective engineering tool for Power Engineering Industry. It can determine detailed flow distributions, temperatures, and pollutant concentrations with excellent accuracy, and without excessive effort by the software user. In the other words it is the science of predicting fluid flow, heat and mass transfer, chemical reactions and related phenomena; and an innovate strategy to conform to regulations and yet stay ahead in today’s competitive power market. This paper is divided into two parts; in first part review of CFD applied to the various types of boilers based on biomass fuels/alternative fuels is presented. In second part CFD analysis of fluidized bed boilers based on rice husk considering the rice husk based furnace has been discussed. The eulerian multiphase model has used for fluidized bed. Fluidized bed has been modeled using Fluent 6.2 commercial code. The effect of numerical influence of bed superheater tubes has also been discussed.

Keywords

CFD combustion eulerian multiphase model 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Demirbas, A., 2003, Progress in Energy and Combustion Science, Vol. 30, pp. 219–230. http://www.monstersandcritics.com/news/business/news/article_1404829.CrossRefGoogle Scholar
  2. Jain, A., Rajeshwar, Roo T., Sambi, S.S. and Grover, P.D., 1995, 7, pp. 285–289.Google Scholar
  3. Jenkins BM, Baxter LL, Miles Jr TR, Miles TR., 1998, Fuel Process Technol; 54:pp. 17.CrossRefGoogle Scholar
  4. Herna’ndez JR, Kilpinen P., 2005, Proc. of the 4th med. combustion symposium, Lisbon, Portugal.Google Scholar
  5. Singh Ravi Inder, Mohapatra S.K., Gangacharyulu D., Energy Conservation and Management, Elsevier, Vol 49 No. 11, pp 3086–3103.Google Scholar
  6. Stastny, M., Ahnert, F., Spliethoff, H., 2002. Advanced Computational Methods in Heat Transfer VII, edited by B. Sundell, C.A. Brebbia, WIT Press, Boston, pp. 439–448.Google Scholar
  7. Soren K. Kaer, 2004, Fuel, Vol. 83, pp. 1183–1190.CrossRefGoogle Scholar
  8. L. Ma, J.M. Jones, M. Pourkashinian and A. Williams, 2007, Fuel, Vol. 86, pp. 1959–1965.CrossRefGoogle Scholar
  9. Sanjib K. Das Sharma and Ratan Mohan, 2003, Int. J. chem. react. Engg., Vol 1, article 26.Google Scholar
  10. Schaeffer, D.G., 1987, J. Diff. Eq., 66, pp 19.CrossRefGoogle Scholar
  11. Syamlal, M., Rogers, W., and O’Brien, T.J., 1993, MFIX Documentation: Theory Guide, U.S. Dept of energy, Office of fossil energy, DOE/METC-94/l004(DE94000087) Technical note.Google Scholar
  12. Walsh, A.R., 2006, In: 7th European Conference on Industrial Furnaces and Boilers, Porto, Portugal, April 18–21, pp. 1–11.Google Scholar
  13. Zhang, D.Z., and Rauenzahn, R. M., 1997, J. Rheo., 4l, pp. 1275.CrossRefGoogle Scholar

Copyright information

© Tsinghua University Press, Beijing and Springer-Verlag Berlin Heidelberg 2009

Authors and Affiliations

  • Ravi Inder Singh
    • 1
  • S. K. Mohapatra
    • 2
  • D. Gangacharyulu
    • 2
  1. 1.Department of Mechanical EngineeringGuru Nanak Dev Engineering CollegeLudhiana, PunjabIndia
  2. 2.Department of Mechanical EngineeringThapar UniversityPatiala, PunjabIndia

Personalised recommendations