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Heat and flow characteristics of air heater ducts provided with turbulators—A review

Author

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  • Alam, Tabish
  • Saini, R.P.
  • Saini, J.S.

Abstract

The use of turbulators in different forms of ribs, baffles, delta winglets, obstacles, vortex generator, rings and perforated blocks/baffles is an effective way to improve the performance of heat exchangers and solar air heaters. Investigators studied the effect of these turbulators for heat transfer and friction characteristics in air ducts. An attempt has been made in this paper to carry out an extensive literature review of turbulators used to investigate heat transfer augmentation and flow structure in air ducts. Based on the review it is found that perforation in ribs/baffles/blocks and combination of combined rib and delta winglet leads to the better thermo-hydraulic performance. The correlations presented by various investigators, in terms of non-dimensional parameters for heat transfer and friction factor in solar air heaters and heat exchangers have also been presented.

Suggested Citation

  • Alam, Tabish & Saini, R.P. & Saini, J.S., 2014. "Heat and flow characteristics of air heater ducts provided with turbulators—A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 31(C), pages 289-304.
    • Handle: RePEc:eee:rensus:v:31:y:2014:i:c:p:289-304
    DOI: 10.1016/j.rser.2013.11.050
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    References listed on IDEAS

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    1. Kotcioglu, Isak & Caliskan, Sinan & Cansiz, Ahmet & Baskaya, Senol, 2010. "Second law analysis and heat transfer in a cross-flow heat exchanger with a new winglet-type vortex generator," Energy, Elsevier, vol. 35(9), pages 3686-3695.
    2. Ozgen, Filiz & Esen, Mehmet & Esen, Hikmet, 2009. "Experimental investigation of thermal performance of a double-flow solar air heater having aluminium cans," Renewable Energy, Elsevier, vol. 34(11), pages 2391-2398.
    3. Chaube, Alok & Sahoo, P.K. & Solanki, S.C., 2006. "Analysis of heat transfer augmentation and flow characteristics due to rib roughness over absorber plate of a solar air heater," Renewable Energy, Elsevier, vol. 31(3), pages 317-331.
    4. Bergles, A.E. & Webb, R.L. & Junkan, G.H., 1979. "Energy conservation via heat transfer enhancement," Energy, Elsevier, vol. 4(2), pages 193-200.
    5. Ho-Ming, Yeh & Wen-Hsen, Chou, 1991. "Efficiency of solar air heaters with baffles," Energy, Elsevier, vol. 16(7), pages 983-987.
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    Citations

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    Cited by:

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    4. Saxena, Abhishek & Varun, & El-Sebaii, A.A., 2015. "A thermodynamic review of solar air heaters," Renewable and Sustainable Energy Reviews, Elsevier, vol. 43(C), pages 863-890.
    5. Mangrulkar, Chidanand K. & Dhoble, Ashwinkumar S. & Chamoli, Sunil & Gupta, Ashutosh & Gawande, Vipin B., 2019. "Recent advancement in heat transfer and fluid flow characteristics in cross flow heat exchangers," Renewable and Sustainable Energy Reviews, Elsevier, vol. 113(C), pages 1-1.
    6. Singh, Sukhmeet & Chander, Subhash & Saini, J.S., 2015. "Thermo-hydraulic performance due to relative roughness pitch in V-down rib with gap in solar air heater duct—Comparison with similar rib roughness geometries," Renewable and Sustainable Energy Reviews, Elsevier, vol. 43(C), pages 1159-1166.
    7. Hu, Jianjun & Guo, Meng & Guo, Jinyong & Zhang, Guangqiu & Zhang, Yuwen, 2020. "Numerical and experimental investigation of solar air collector with internal swirling flow," Renewable Energy, Elsevier, vol. 162(C), pages 2259-2271.
    8. Gürdal, Mehmet & Arslan, Kamil & Gedik, Engin & Minea, Alina Adriana, 2022. "Effects of using nanofluid, applying a magnetic field, and placing turbulators in channels on the convective heat transfer: A comprehensive review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 162(C).

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