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Numerical investigation of heat transfer and fluid flow in a solar air heater duct with multi V-shaped ribs on the absorber plate

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  • Jin, Dongxu
  • Zhang, Manman
  • Wang, Ping
  • Xu, Shasha

Abstract

A numerical investigation of heat transfer and fluid flow characteristics in a solar air heater duct having multi V-shaped ribs on the absorber plate is presented in this study. Three-dimensional simulations are conducted using the ANSYS FLUENT code and the Renormalization-group k–ε turbulence model. The computations are performed for different rib geometries with a varying spanwise V-rib number, relative rib pitch, relative rib height, and angle of attack, and for different Reynolds numbers. The effects of the rib geometrical parameters on the Nusselt number, friction factor, and flow structure are obtained and analyzed. Clearly, the multi V-shaped ribs greatly enhanced the heat transfer. The maximum value of the thermal performance parameter was found to be 1.93 for the range of parameters investigated. The multi V-shaped ribs generate streamwise helical vortex flows, which promote the fluid mixing between the colder mainstream fluid and the warmer fluid near the absorber wall. In addition, the moving subsidiary vortex structure at the inter-rib region further enhances the local fluid mixing.

Suggested Citation

  • Jin, Dongxu & Zhang, Manman & Wang, Ping & Xu, Shasha, 2015. "Numerical investigation of heat transfer and fluid flow in a solar air heater duct with multi V-shaped ribs on the absorber plate," Energy, Elsevier, vol. 89(C), pages 178-190.
  • Handle: RePEc:eee:energy:v:89:y:2015:i:c:p:178-190
    DOI: 10.1016/j.energy.2015.07.069
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    References listed on IDEAS

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    Citations

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    Cited by:

    1. Jin, Dongxu & Quan, Shenglin & Zuo, Jianguo & Xu, Shiming, 2019. "Numerical investigation of heat transfer enhancement in a solar air heater roughened by multiple V-shaped ribs," Renewable Energy, Elsevier, vol. 134(C), pages 78-88.
    2. Varun Kumar B. & G. Manikandan & P. Rajesh Kanna & Dawid Taler & Jan Taler & Marzena Nowak-Ocłoń & Karol Mzyk & Hoong Thiam Toh, 2018. "A Performance Evaluation of a Solar Air Heater Using Different Shaped Ribs Mounted on the Absorber Plate—A Review," Energies, MDPI, Open Access Journal, vol. 11(11), pages 1-20, November.
    3. 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.
    4. Nidhul, Kottayat & Kumar, Sachin & Yadav, Ajay Kumar & Anish, S., 2020. "Enhanced thermo-hydraulic performance in a V-ribbed triangular duct solar air heater: CFD and exergy analysis," Energy, Elsevier, vol. 200(C).
    5. Singh, Amritpal & Singh, Sukhmeet, 2017. "CFD investigation on roughness pitch variation in non-uniform cross-section transverse rib roughness on Nusselt number and friction factor characteristics of solar air heater duct," Energy, Elsevier, vol. 128(C), pages 109-127.
    6. Ameur, Houari, 2015. "Energy efficiency of different impellers in stirred tank reactors," Energy, Elsevier, vol. 93(P2), pages 1980-1988.
    7. Bensaci, Charaf-Eddine & Moummi, Abdelhafid & Sanchez de la Flor, Francisco J. & Rodriguez Jara, Enrique A. & Rincon-Casado, Alejandro & Ruiz-Pardo, Alvaro, 2020. "Numerical and experimental study of the heat transfer and hydraulic performance of solar air heaters with different baffle positions," Renewable Energy, Elsevier, vol. 155(C), pages 1231-1244.
    8. Yu-Jin Kim & Kwang-Seob Lee & Libing Yang & Evgueniy Entchev & Eun-Chul Kang & Euy-Joon Lee, 2020. "Validation and Numerical Sensitivity Study of Air Baffle Photovoltaic-Thermal Module," Energies, MDPI, Open Access Journal, vol. 13(8), pages 1-13, April.
    9. Chauhan, Ranchan & Singh, Tej & Tiwari, Avinash & Patnaik, Amar & Thakur, N.S., 2017. "Hybrid entropy – TOPSIS approach for energy performance prioritization in a rectangular channel employing impinging air jets," Energy, Elsevier, vol. 134(C), pages 360-368.
    10. 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.
    11. Sheikholeslami, M. & Ganji, D.D., 2016. "Heat transfer enhancement in an air to water heat exchanger with discontinuous helical turbulators; experimental and numerical studies," Energy, Elsevier, vol. 116(P1), pages 341-352.
    12. Alam, Tabish & Kim, Man-Hoe, 2016. "Numerical study on thermal hydraulic performance improvement in solar air heater duct with semi ellipse shaped obstacles," Energy, Elsevier, vol. 112(C), pages 588-598.
    13. Jin, Dongxu & Zuo, Jianguo & Quan, Shenglin & Xu, Shiming & Gao, Hao, 2017. "Thermohydraulic performance of solar air heater with staggered multiple V-shaped ribs on the absorber plate," Energy, Elsevier, vol. 127(C), pages 68-77.

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