IDEAS home Printed from https://ideas.repec.org/a/eee/renene/v145y2020icp2056-2073.html
   My bibliography  Save this article

Curved vs. flat solar air heater: Performance evaluation under diverse environmental conditions

Author

Listed:
  • Singh, Ajeet Pratap
  • Singh, O.P.

Abstract

The present study evaluates and compares the performance matrix of a curved and flat solar air heater (SAH) under diverse environmental conditions using an experimentally validated numerical model. Firstly, the optimum curvature angle for curved SAH that offers optimum thermal performance (i.e. 25°) under wide range of parameters such as Reynolds numbers (2200–6000), mass flow rate (0.0172–0.0472 kg/sm2) and solar radiation inclination angle (0–60°) has been determined. The enhancement factor (i.e. Nucurved/Nuflat) is in the range 1.5-2.2 which show that curved SAH is thermally much better than flat design. Secondly, the optimized curved SAH is then compared with flat design for 0–60° tilt anglesθ, under tranquil and windy conditions (wind velocity range: 0.5–4 m/s), respectively. Under windy condition the heat loss from SAH to surrounding is lower for curved SAH at θ = 0°, 60° in windward, 30° in leeward and 30° in tranquil- condition in comparison to flat SAH. In the extreme case θ = 60° and wind speed of 4 m/s, the percentage change in average differential pressure coefficient ΔCP is about 2% higher for curved SAH under windward while it is about 19% less in leeward condition compared to flat SAH.

Suggested Citation

  • Singh, Ajeet Pratap & Singh, O.P., 2020. "Curved vs. flat solar air heater: Performance evaluation under diverse environmental conditions," Renewable Energy, Elsevier, vol. 145(C), pages 2056-2073.
  • Handle: RePEc:eee:renene:v:145:y:2020:i:c:p:2056-2073
    DOI: 10.1016/j.renene.2019.07.090
    as

    Download full text from publisher

    File URL: http://www.sciencedirect.com/science/article/pii/S0960148119311103
    Download Restriction: Full text for ScienceDirect subscribers only

    File URL: https://libkey.io/10.1016/j.renene.2019.07.090?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.

    Citations

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


    Cited by:

    1. Kumar, Amit & Akshayveer, & Singh, Ajeet Pratap & Singh, O.P., 2020. "Efficient designs of double-pass curved solar air heaters," Renewable Energy, Elsevier, vol. 160(C), pages 1105-1118.
    2. Sheikhnejad, Yahya & Gandjalikhan Nassab, Seyed Abdolreza, 2021. "Enhancement of solar chimney performance by passive vortex generator," Renewable Energy, Elsevier, vol. 169(C), pages 437-450.
    3. Khanlari, Ataollah & Tuncer, Azim Doğuş & Sözen, Adnan & Aytaç, İpek & Çiftçi, Erdem & Variyenli, Halil İbrahim, 2022. "Energy and exergy analysis of a vertical solar air heater with nano-enhanced absorber coating and perforated baffles," Renewable Energy, Elsevier, vol. 187(C), pages 586-602.
    4. Kumar, Amit & Akshayveer, & Singh, Ajeet Pratap & Singh, O.P., 2022. "Investigations for efficient design of a new counter flow double-pass curved solar air heater," Renewable Energy, Elsevier, vol. 185(C), pages 759-770.
    5. Singh, Ajeet Pratap & Kumar, Amit & Akshayveer, & Singh, O.P., 2021. "A novel concept of integrating bell-mouth inlet in converging-diverging solar chimney power plant," Renewable Energy, Elsevier, vol. 169(C), pages 318-334.
    6. Vengadesan, Elumalai & Senthil, Ramalingam, 2020. "A review on recent developments in thermal performance enhancement methods of flat plate solar air collector," Renewable and Sustainable Energy Reviews, Elsevier, vol. 134(C).
    7. Kumar, Amit & Singh, Ajeet Pratap & Akshayveer, & Singh, O.P., 2022. "Performance characteristics of a new curved double-pass counter flow solar air heater," Energy, Elsevier, vol. 239(PA).
    8. Singh, Ajeet Pratap & Singh, Jaydeep & Kumar, Amit & Singh, O.P., 2023. "Vertical limit reduction of chimney in solar power plant," Renewable Energy, Elsevier, vol. 217(C).

    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:145:y:2020:i:c:p:2056-2073. 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.

    We have no bibliographic references for this item. You can help adding them by using 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.