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A general optimized geometry of angled ribs for enhancing the thermo-hydraulic behavior of a solar air heater channel – A Taguchi approach

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  • Aghaie, Alireza Zamani
  • Rahimi, Asghar B.
  • Akbarzadeh, Alireza

Abstract

The thermo-hydraulic behavior of the air flow through a solar air heater is numerically simulated and then optimized by use of Taguchi method. An innovative general geometry is introduced for the rib that variation in its parameters can generate triangular, trapezoidal and rectangular geometries simultaneously. A L16 (44) orthogonal array is used to optimize the geometry factors accounts for the maximum thermal performance of the ribbed channel. Thermal performance concept includes maximization of heat transfer coefficient and minimization of friction factor. Maximization of thermal enhancement factor is taken as the criteria of optimization. At a constant flow Reynolds number of 10,000, rib relative pitch (P/H), rib relative height (e/H), rib relative tip width (a/H) and rib front projection (s) are employed as the design factors. Results show that rib pitch, rib height, rib tip width and rib front projection have the greatest influences on the thermo-hydraulic performance, respectively. A triangular rib geometry with rib height of 0.2H and P = 2H in which the rib front is normal to the flow direction (i.e. s = 0) is recognized as the optimum configuration.

Suggested Citation

  • Aghaie, Alireza Zamani & Rahimi, Asghar B. & Akbarzadeh, Alireza, 2015. "A general optimized geometry of angled ribs for enhancing the thermo-hydraulic behavior of a solar air heater channel – A Taguchi approach," Renewable Energy, Elsevier, vol. 83(C), pages 47-54.
  • Handle: RePEc:eee:renene:v:83:y:2015:i:c:p:47-54
    DOI: 10.1016/j.renene.2015.04.016
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    References listed on IDEAS

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    1. Kumar, Anil & Saini, R.P. & Saini, J.S., 2013. "Development of correlations for Nusselt number and friction factor for solar air heater with roughened duct having multi v-shaped with gap rib as artificial roughness," Renewable Energy, Elsevier, vol. 58(C), pages 151-163.
    2. Yakut, Kenan & Alemdaroglu, Nihal & Sahin, Bayram & Celik, Cafer, 2006. "Optimum design-parameters of a heat exchanger having hexagonal fins," Applied Energy, Elsevier, vol. 83(2), pages 82-98, February.
    3. Alam, Tabish & Saini, R.P. & Saini, J.S., 2014. "Use of turbulators for heat transfer augmentation in an air duct – A review," Renewable Energy, Elsevier, vol. 62(C), pages 689-715.
    4. Bhagoria, J.L & Saini, J.S & Solanki, S.C, 2002. "Heat transfer coefficient and friction factor correlations for rectangular solar air heater duct having transverse wedge shaped rib roughness on the absorber plate," Renewable Energy, Elsevier, vol. 25(3), pages 341-369.
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    Cited by:

    1. Gawande, Vipin B. & Dhoble, A.S. & Zodpe, D.B. & Chamoli, Sunil, 2016. "A review of CFD methodology used in literature for predicting thermo-hydraulic performance of a roughened solar air heater," Renewable and Sustainable Energy Reviews, Elsevier, vol. 54(C), pages 550-605.
    2. Deo, Narinderpal Singh & Chander, Subhash & Saini, J.S., 2016. "Performance analysis of solar air heater duct roughened with multigap V-down ribs combined with staggered ribs," Renewable Energy, Elsevier, vol. 91(C), pages 484-500.
    3. Qader, Bootan S. & Supeni, E.E. & Ariffin, M.K.A. & Talib, A.R. Abu, 2019. "Numerical investigation of flow through inclined fins under the absorber plate of solar air heater," Renewable Energy, Elsevier, vol. 141(C), pages 468-481.
    4. Qader, Bootan S. & Supeni, E.E. & Ariffin, M.K.A. & Talib, A.R. Abu, 2019. "RSM approach for modeling and optimization of designing parameters for inclined fins of solar air heater," Renewable Energy, Elsevier, vol. 136(C), pages 48-68.

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