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Numerical study on thermal hydraulic performance improvement in solar air heater duct with semi ellipse shaped obstacles

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  • Alam, Tabish
  • Kim, Man-Hoe

Abstract

This paper presents numerical study on heat transfer and friction characteristics in rectangular solar air heater duct with semi elliptical shape obstacles. 3-D simulations have been conducted using Renormalization-group k-ε turbulence model. Obstacles are placed on the absorber plate in V-down shape at different angle of attack (α), ranging from 30° to 90°. Two different arrangements of obstacles namely; inline and staggered arrangements have been investigated. Four different values of Reynolds number, ranging from 6000 to 18,000 have been considered to determine the values of Nusselt number and friction factor. Angle of attack (α) and obstacles arrangement significantly affect the Nusselt number and friction factor. In staggered arrangement, maximum enhancement in Nusselt number and friction factor have been observed 2.05 and 6.93, respectively, at an angle of attack (α) of 75° and corresponding enhancement in case of inline arrangement are found as 1.73 and 6.12, respectively. The maximum enhancement in Nusselt number at 75° angle of attack is due to combined effect of high turbulence and lateral movement of air flow. Thermohydraulic performance has also been determined which shows staggered arrangement are more superior than inline arrangement for all values of angle of attack (α) investigated in present study.

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  • 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.
    • Handle: RePEc:eee:energy:v:112:y:2016:i:c:p:588-598
    DOI: 10.1016/j.energy.2016.06.105
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    References listed on IDEAS

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    4. 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.
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    Citations

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    Cited by:

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    2. Varun Kumar, B. & Manikandan, G. & Rajesh Kanna, P., 2021. "Enhancement of heat transfer in SAH with polygonal and trapezoidal shape of the rib using CFD," Energy, Elsevier, vol. 234(C).
    3. Karmveer & Naveen Kumar Gupta & Tabish Alam & Raffaello Cozzolino & Gino Bella, 2022. "A Descriptive Review to Access the Most Suitable Rib’s Configuration of Roughness for the Maximum Performance of Solar Air Heater," Energies, MDPI, vol. 15(8), pages 1-46, April.
    4. Kumar, Rajneesh & Kumar, Anoop & Goel, Varun, 2019. "Performance improvement and development of correlation for friction factor and heat transfer using computational fluid dynamics for ribbed triangular duct solar air heater," Renewable Energy, Elsevier, vol. 131(C), pages 788-799.
    5. Alam, Tabish & Kim, Man-Hoe, 2017. "Performance improvement of double-pass solar air heater – A state of art of review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 79(C), pages 779-793.
    6. Alam, Tabish & Kim, Man-Hoe, 2018. "A comprehensive review on single phase heat transfer enhancement techniques in heat exchanger applications," Renewable and Sustainable Energy Reviews, Elsevier, vol. 81(P1), pages 813-839.
    7. Tayyab, Muhammad & Cheema, Taqi Ahmad & Malik, Muhammad Sohail & Muzaffar, Atif & Sajid, Muhammad Bilal & Park, Cheol Woo, 2020. "Investigation of thermal energy exchange potential of a gravitational water vortex," Renewable Energy, Elsevier, vol. 162(C), pages 1380-1398.
    8. Nidhul, Kottayat & Yadav, Ajay Kumar & Anish, S. & Kumar, Sachin, 2021. "Critical review of ribbed solar air heater and performance evaluation of various V-rib configuration," Renewable and Sustainable Energy Reviews, Elsevier, vol. 142(C).
    9. Debnath, Suman & Das, Biplab & Randive, P.R. & Pandey, K.M., 2018. "Performance analysis of solar air collector in the climatic condition of North Eastern India," Energy, Elsevier, vol. 165(PB), pages 281-298.
    10. Kumar, Rajneesh & Goel, Varun & Kumar, Anoop, 2018. "Investigation of heat transfer augmentation and friction factor in triangular duct solar air heater due to forward facing chamfered rectangular ribs: A CFD based analysis," Renewable Energy, Elsevier, vol. 115(C), pages 824-835.
    11. Kumar, Raj & Kumar, Anil & Chauhan, Ranchan & Maithani, Rajesh, 2018. "Comparative study of effect of various blockage arrangements on thermal hydraulic performance in a roughened air passage," Renewable and Sustainable Energy Reviews, Elsevier, vol. 81(P1), pages 447-463.
    12. Salih, Salah M. & Jalil, Jalal M. & Najim, Saleh E., 2019. "Experimental and numerical analysis of double-pass solar air heater utilizing multiple capsules PCM," Renewable Energy, Elsevier, vol. 143(C), pages 1053-1066.
    13. Bezbaruah, Parag Jyoti & Das, Rajat Subhra & Sarkar, Bikash Kumar, 2021. "Experimental and numerical analysis of solar air heater accoutered with modified conical vortex generators in a staggered fashion," Renewable Energy, Elsevier, vol. 180(C), pages 109-131.
    14. Tabish Alam & Nagesh Babu Balam & Kishor Sitaram Kulkarni & Md Irfanul Haque Siddiqui & Nishant Raj Kapoor & Chandan Swaroop Meena & Ashok Kumar & Raffaello Cozzolino, 2021. "Performance Augmentation of the Flat Plate Solar Thermal Collector: A Review," Energies, MDPI, vol. 14(19), pages 1-23, September.

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