Effect of Horizontal Tube Position on Wall-to-Bed Heat Transfer in Air-Solid Fluidized Bed of Large Particles
Authors
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Department of Mechanical Engineering, Bangalore Institute of Technology, Bangalore - 560004, Karnataka ,IN
Girish Byregowda -
Department of Sciences, School of Physical Sciences, Amrita Vishwa Vidyapeetham, Mysuru - 570026, Karnataka ,INRavindranath Govindaswamy
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Visvesvaraya Technological University, Belagavi - 590018, Karnataka ,INVidyashankar Shivashankaran
DOI:
https://doi.org/10.18311/jmmf/2023/34362Keywords:
Fluidized Bed Heat Transfer, Large Particles, Tube PositionAbstract
Fluidized beds are extensively used in a variety of industrial applications, such as heat recovery systems, coal combustion, and solid particle drying. The effect of the position of the heat transfer tube on heat transfer from a horizontal bare tube in a 150 mm square cross-section fluidized bed containing large particles, ragi, and mustard is investigated. The influence of varying fluidizing velocities on heat transport is also examined for a fixed bed height of the large particles. When the position of the tube from the distributor plate was increased in 0.028m increments from 0.52 m to 0.080 m and then to 0.108 m, the heat transfer coefficient was reduced. Due to enhanced fluidization, all bed heights yielded almost comparable heat transfer coefficient values at velocities exceeding 1 m/s, 170 and 160 W/m2K for ragi and mustard, respectively. The dependency of the heat transfer coefficient on fluidizing velocity is qualitatively like that of small particles. An error deviation of around 8.8% was found when comparing experimental heat transfer coefficient values to those predicted from empirical correlations in the published literature.
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This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
Accepted 2023-12-06
Published 2024-01-04
References
Botterill JSM, Botterill JSM. Fluid-bed heat transfer: Gas-fluidized bed behaviour and its influence on bed thermal properties. Academic Press; 1975. https://books. google.co.in/books?id=93RocozkHtEC
Decker N, Glicksman LR. Heat transfer in large particle fluidized beds. Int J Heat Mass Transf. 1983; 26(9):1307- 20. https://doi.org/10.1016/S0017-9310(83)80062-3 DOI: https://doi.org/10.1016/S0017-9310(83)80062-3
Grewal NS, Saxena SC. Heat transfer between a horizontal tube and a gas-solid fluidized bed. Int J Heat Mass Transf. 1980; 23(11):1505-19. https://doi. org/10.1016/0017-9310(80)90154-4 DOI: https://doi.org/10.1016/0017-9310(80)90154-4
Kim SW, Ahn JY, Kim SD, Hyun Lee D. Heat transfer and bubble characteristics in a fluidized bed with immersed horizontal tube bundle. Int J Heat Mass Transf. 2003; 46(3):399-409. https://doi.org/10.1016/ S0017-9310(02)00296-X DOI: https://doi.org/10.1016/S0017-9310(02)00296-X
Mickley HS, Fairbanks DF. Mechanism of heat transfer to fluidized beds. AIChE J. 1955; 1(3):374-84. https:// doi.org/10.1002/aic.690010317 DOI: https://doi.org/10.1002/aic.690010317
Rasouli S, Golriz MR, Hamidi AA. Effect of annular fins on heat transfer of a horizontal immersed tube in bubbling fluidized beds. Powder Technol. 2005; 154(1):9- 13. https://doi.org/10.1016/j.powtec.2005.02.008 DOI: https://doi.org/10.1016/j.powtec.2005.02.008
Masoumifard N, Mostoufi N, Hamidi AA, Sotudeh- Gharebagh R. Investigation of heat transfer between a horizontal tube and gas–solid fluidized bed. Int J Heat Fluid Flow. 2008; 29(5):1504-11. https://doi. org/10.1016/j.ijheatfluidflow.2008.06.004 DOI: https://doi.org/10.1016/j.ijheatfluidflow.2008.06.004
Abid BA, Ali JM, Alzubaidi AA. Heat transfer in a gassolid fluidized bed with various heater inclinations. Int J Heat Mass Transf. 2011; 54(9-10):2228-33. https://doi. org/10.1016/j.ijheatmasstransfer.2010.12.028 DOI: https://doi.org/10.1016/j.ijheatmasstransfer.2010.12.028
Merzsch M, Lechner S, Krautz HJ. Heat transfer from single horizontal tubes in fluidized beds: Influence of tube diameter, moisture and diameter-definition by Geldart C fines content. Powder Technol. 2013; 235:1038-46. https://doi.org/10.1016/j.powtec.2012.12.002 DOI: https://doi.org/10.1016/j.powtec.2012.12.002
Ostermeier P, Vandersickel A, Becker M, Gleis S, Spliethoff H. Hydrodynamics and heat transfer around a horizontal tube immersed in a Geldart B bubbling fluidized bed. Int J Comput Methods Exp Meas. 2018; 6(1):71-85. https://doi.org/10.2495/CMEMV6- N1-71-85 DOI: https://doi.org/10.2495/CMEM-V6-N1-71-85
Vogtenhuber H, Pernsteiner D, Hofmann R. Experimental and numerical investigations on heat transfer of bare tubes in a bubbling fluidized bed with respect to better heat integration in temperature swing adsorption systems. Energies. 2019; 12(14). https://doi. org/10.3390/en12142646 DOI: https://doi.org/10.3390/en12142646
Lechner S, Merzsch M, Krautz HJ. Heat transfer from horizontal tube bundles into fluidized beds with Geldart A lignite particles. Powder Technol. 2014; 253:14-21. https://doi.org/10.1016/j.powtec.2013.10.041 DOI: https://doi.org/10.1016/j.powtec.2013.10.041
Kline SJ. McClintock F. Describing uncertainties in single-sample experiments. Mech Eng. 1953; 75:3-8. 14. Andeen BR. Glicksman LR. Heat transfer to horizontal tubes in shallow fluidized beds. In: Proceedings of ASME-AIChE Heat Transfer Conference. St. Louis, MO; 1976 :Paper No. 76-HT-67.
