IDEAS home Printed from https://ideas.repec.org/a/eee/renene/v194y2022icp100-116.html
   My bibliography  Save this article

Experimental investigation of relative roughness height effect in solar air collector with convex dimples

Author

Listed:
  • Şevik, Seyfi
  • Özdilli, Özgür
  • Abuşka, Mesut

Abstract

This study focuses on the effect of dimple depth on improving thermal performance in a solar air collector (SAC) with huge convex dimples placed staggered on an absorber. In this regard, convex dimple absorbers with two different types of relative roughness heights, δ/D = 0.16 and δ/D = 0.32, and a flat plate absorber were tested for back-pass and front-pass applications at air mass flow rates of 0.013, 0.027, and 0.036 kg/s. The highest average energy efficiency of 37.9% and 53.5% were achieved for dimpled absorber plates in back-pass and front-pass, respectively, with δ/D = 0.32 at an air mass flow rate of 0.036 kg/s. The exergy efficiency ranged from 8.1% to 12.4% for the back-pass application, whereas it fluctuated from 14.6 to 19.7 in the front-pass application. In comparing δ/D = 0.32 with the flat plate in the back-pass application, Nud/Nuf varied from 1.2 to 1.48 with an increase in Re, while in the front-pass Nud/Nuf changed from 1.13 to 1.37. In the back-pass, Nud/Nuf/(fd/ff) achieved 1.24 in favor of δ/D = 0.32 at Re = 4000, on the other hand, it reached 1.15 in the front-pass. Similarly, the highest Colburn factor values in all Re numbers were obtained in the case of relative roughness height of δ/D = 0.32. As a result, a relative roughness height equal to 0.32 is the optimal geometry for this investigation of a dimpled collector. Accordingly, the results showed that SACs with convex dimples are more successful than the flat plates, thanks to the surface area expansion and turbulence generating ability, which significantly increases the thermal efficiency. This study also recommends the use of a front-pass application.

Suggested Citation

  • Şevik, Seyfi & Özdilli, Özgür & Abuşka, Mesut, 2022. "Experimental investigation of relative roughness height effect in solar air collector with convex dimples," Renewable Energy, Elsevier, vol. 194(C), pages 100-116.
  • Handle: RePEc:eee:renene:v:194:y:2022:i:c:p:100-116
    DOI: 10.1016/j.renene.2022.05.088
    as

    Download full text from publisher

    File URL: http://www.sciencedirect.com/science/article/pii/S0960148122007352
    Download Restriction: Full text for ScienceDirect subscribers only

    File URL: https://libkey.io/10.1016/j.renene.2022.05.088?utm_source=ideas
    LibKey link: if access is restricted and if your library uses this service, LibKey will redirect you to where you can use your library subscription to access this item
    ---><---

    As the access to this document is restricted, you may want to search for a different version of it.

    References listed on IDEAS

    as
    1. Kim, Hyun-Min & Moon, Mi-Ae & Kim, Kwang-Yong, 2011. "Multi-objective optimization of a cooling channel with staggered elliptic dimples," Energy, Elsevier, vol. 36(5), pages 3419-3428.
    2. Kumar, Anil & Kumar, Raj & Maithani, Rajesh & Chauhan, Ranchan & Sethi, Muneesh & Kumari, Anita & Kumar, Sushil & Kumar, Sunil, 2017. "Correlation development for Nusselt number and friction factor of a multiple type V-pattern dimpled obstacles solar air passage," Renewable Energy, Elsevier, vol. 109(C), pages 461-479.
    3. Kumar, Vikash, 2019. "Nusselt number and friction factor correlations of three sides concave dimple roughened solar air heater," Renewable Energy, Elsevier, vol. 135(C), pages 355-377.
    4. Liu, Jian & Song, Yidan & Xie, Gongnan & Sunden, Bengt, 2015. "Numerical modeling flow and heat transfer in dimpled cooling channels with secondary hemispherical protrusions," Energy, Elsevier, vol. 79(C), pages 1-19.
    5. Saini, R.P. & Verma, Jitendra, 2008. "Heat transfer and friction factor correlations for a duct having dimple-shape artificial roughness for solar air heaters," Energy, Elsevier, vol. 33(8), pages 1277-1287.
    6. Rashidi, Saman & Hormozi, Faramarz & Sundén, Bengt & Mahian, Omid, 2019. "Energy saving in thermal energy systems using dimpled surface technology – A review on mechanisms and applications," Applied Energy, Elsevier, vol. 250(C), pages 1491-1547.
    Full references (including those not matched with items on IDEAS)

    Citations

    Citations are extracted by the CitEc Project, subscribe to its RSS feed for this item.
    as


    Cited by:

    1. Krzysztof Dutkowski & Marcin Kruzel & Jacek Fiuk & Krzysztof Rokosz & Iwona Michalska-Pożoga & Marcin Szczepanek, 2023. "Experimental Studies on the Influence of Spatial Orientation of a Passive Air Solar Collector on Its Efficiency," Energies, MDPI, vol. 16(10), pages 1-13, May.
    2. Kim, Suyoung & Park, Sae Han & Chang, Ye Ji & Go, Yujin & Kim, Sung Won, 2024. "Carbon nanotube microbeads for enhanced gas heating in a fluidized bed solar air collector," Renewable Energy, Elsevier, vol. 221(C).

    Most related items

    These are the items that most often cite the same works as this one and are cited by the same works as this one.
    1. Choi, Seok Min & Kwon, Hyun Goo & Kim, Taehyun & Moon, Hee Koo & Cho, Hyung Hee, 2022. "Active cooling of photovoltaic (PV) cell by acoustic excitation in single-dimpled internal channel," Applied Energy, Elsevier, vol. 309(C).
    2. Luo, Lei & Du, Wei & Wang, Songtao & Wang, Lei & Sundén, Bengt & Zhang, Xinhong, 2017. "Multi-objective optimization of a solar receiver considering both the dimple/protrusion depth and delta-winglet vortex generators," Energy, Elsevier, vol. 137(C), pages 1-19.
    3. Chauhan, Ranchan & Kim, Sung Chul, 2019. "Effective efficiency distribution characteristics in protruded/dimpled-arc plate solar thermal collector," Renewable Energy, Elsevier, vol. 138(C), pages 955-963.
    4. Kumar, Vikash, 2021. "Experimental investigation of exergetic efficiency of 3 side concave dimple roughened absorbers," Energy, Elsevier, vol. 215(PB).
    5. Rashidi, Saman & Hormozi, Faramarz & Sundén, Bengt & Mahian, Omid, 2019. "Energy saving in thermal energy systems using dimpled surface technology – A review on mechanisms and applications," Applied Energy, Elsevier, vol. 250(C), pages 1491-1547.
    6. Choi, Seok Min & Kwon, Hyun Goo & Bae, Hyung Mo & Moon, Hee Koo & Cho, Hyung Hee, 2023. "Effects of staggered dimple array under different flow conditions for enhancing cooling performance of solar systems," Applied Energy, Elsevier, vol. 342(C).
    7. Kumar, Vikash & Murmu, Ramesh, 2021. "Experimental investigation for thermal performance of inclined spherical ball roughened solar air duct," Renewable Energy, Elsevier, vol. 172(C), pages 1365-1392.
    8. Zhen Zhao & Liang Xu & Jianmin Gao & Lei Xi & Qicheng Ruan & Yunlong Li, 2022. "Multi-Objective Optimization of Parameters of Channels with Staggered Frustum of a Cone Based on Response Surface Methodology," Energies, MDPI, vol. 15(3), pages 1-19, February.
    9. Salman, Mohammad & Park, Myeong Hyeon & Chauhan, Ranchan & Kim, Sung Chul, 2021. "Experimental analysis of single loop solar heat collector with jet impingement over indented dimples," Renewable Energy, Elsevier, vol. 169(C), pages 618-628.
    10. Liu, Jian & Song, Yidan & Xie, Gongnan & Sunden, Bengt, 2015. "Numerical modeling flow and heat transfer in dimpled cooling channels with secondary hemispherical protrusions," Energy, Elsevier, vol. 79(C), pages 1-19.
    11. Kumar, Rajneesh & Sharma, Akshay & Goel, Varun & Sharma, Rajesh & Sethi, Muneesh & Tyagi, V.V., 2023. "An experimental investigation of new roughness patterns (dimples with alternative protrusions) for the performance enhancement of solar air heater," Renewable Energy, Elsevier, vol. 211(C), pages 964-974.
    12. Azadani, Leila N. & Gharouni, Nadiya, 2021. "Multi objective optimization of cylindrical shape roughness parameters in a solar air heater," Renewable Energy, Elsevier, vol. 179(C), pages 1156-1168.
    13. Hamid, Mohammed O.A. & Zhang, Bo & Yang, Luopeng, 2014. "Application of field synergy principle for optimization fluid flow and convective heat transfer in a tube bundle of a pre-heater," Energy, Elsevier, vol. 76(C), pages 241-253.
    14. Arunkumar, H.S. & Kumar, Shiva & Karanth, K. Vasudeva, 2020. "Analysis of a solar air heater for augmented thermohydraulic performance using helicoidal spring shaped fins-A numerical study," Renewable Energy, Elsevier, vol. 160(C), pages 297-311.
    15. Hosseinkhani, A. & Gandjalikhan Nassab, S.A., 2024. "Study of gas radiation effect on the performance of single-pass solar heaters with an air gap," Energy, Elsevier, vol. 294(C).
    16. El-Sebaii, A.A. & Al-Snani, H., 2010. "Effect of selective coating on thermal performance of flat plate solar air heaters," Energy, Elsevier, vol. 35(4), pages 1820-1828.
    17. Mohammadi, K. & Sabzpooshani, M., 2013. "Comprehensive performance evaluation and parametric studies of single pass solar air heater with fins and baffles attached over the absorber plate," Energy, Elsevier, vol. 57(C), pages 741-750.
    18. 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.
    19. Lanjewar, Atul & Bhagoria, J.L. & Sarviya, R.M., 2011. "Heat transfer and friction in solar air heater duct with W-shaped rib roughness on absorber plate," Energy, Elsevier, vol. 36(7), pages 4531-4541.
    20. Xiuzhen Li & Shijie Liu & Xun Mo & Zhaoyang Sun & Guo Tian & Yifan Xin & Dongsheng Zhu, 2023. "Investigation on Convection Heat Transfer Augment in Spirally Corrugated Pipe," Energies, MDPI, vol. 16(3), pages 1-17, January.

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:eee:renene:v:194:y:2022:i:c:p:100-116. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    If CitEc recognized a bibliographic reference but did not link an item in RePEc to it, you can help with this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: Catherine Liu (email available below). General contact details of provider: http://www.journals.elsevier.com/renewable-energy .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.