IDEAS home Printed from https://ideas.repec.org/a/gam/jeners/v12y2019i12p2341-d241007.html
   My bibliography  Save this article

Influence of Geometric Parameters of Alternate Axis Twisted Baffles on the Local Heat Transfer Distribution and Pressure Drop in a Rectangular Channel Using a Transient Liquid Crystal Technique

Author

Listed:
  • Arnut Phila

    (Department of Mechanical Engineering, Faculty of Engineering, King Mongkut’s Institute of Technology Ladkrabang, Bangkok 10520, Thailand)

  • Chinaruk Thianpong

    (Department of Mechanical Engineering, Faculty of Engineering, King Mongkut’s Institute of Technology Ladkrabang, Bangkok 10520, Thailand)

  • Smith Eiamsa-ard

    (Department of Mechanical Engineering, Faculty of Engineering, Mahanakorn University of Technology, Bangkok 10530, Thailand)

Abstract

This paper reports the effects of alternate axis twisted baffle geometric parameters on the heat transfer and flow characteristics within rectangular channels. In our experiments we used modified shapes of alternate axis twisted baffles according to relative pitch ratios ( s / w ) equal to 2–12 and twist ratios ( y / w ) equal to 1–5, under conditions where the angle of attack ( α ) was 90° and the relative blockage height ( e / D h ) was at a constant value of 0.095. The results for the Reynolds numbers based on the duct hydraulic diameter ranged from 9000 to 24,000 at a constant Prandtl number, Pr = 0.707, using air as a working fluid. A 0.05 mm thick stainless-steel foil was used as a heater, and a thermochromic liquid crystal technique was used to obtain the local temperature distribution on the heated surfaces. Images were captured in areas with periodic, fully developed regions in the channel. The results show that rectangular channels equipped with alternate axis twisted baffles demonstrated 80%–185% greater heat transfer than rectangular channels with no baffles. Channels with alternate axis twisted baffles at higher twist ratios ( y / w ) and smaller relative pitch ratios ( s / w ) showed increased heat transfer, as well as pressure loss within the system, compared with other types of twisted baffles. The thermal enhancement factor of the rectangular channels equipped with alternate axis twisted baffles was higher than that for transverse baffles and smooth channels under similar operating conditions.

Suggested Citation

  • Arnut Phila & Chinaruk Thianpong & Smith Eiamsa-ard, 2019. "Influence of Geometric Parameters of Alternate Axis Twisted Baffles on the Local Heat Transfer Distribution and Pressure Drop in a Rectangular Channel Using a Transient Liquid Crystal Technique," Energies, MDPI, vol. 12(12), pages 1-25, June.
  • Handle: RePEc:gam:jeners:v:12:y:2019:i:12:p:2341-:d:241007
    as

    Download full text from publisher

    File URL: https://www.mdpi.com/1996-1073/12/12/2341/pdf
    Download Restriction: no

    File URL: https://www.mdpi.com/1996-1073/12/12/2341/
    Download Restriction: no
    ---><---

    References listed on IDEAS

    as
    1. Anil Kumar & Man-Hoe Kim, 2016. "Thermal Hydraulic Performance in a Solar Air Heater Channel with Multi V-Type Perforated Baffles," Energies, MDPI, vol. 9(7), pages 1-18, July.
    2. Zhang, Ji & Zhu, Xiaowei & Mondejar, Maria E. & Haglind, Fredrik, 2019. "A review of heat transfer enhancement techniques in plate heat exchangers," Renewable and Sustainable Energy Reviews, Elsevier, vol. 101(C), pages 305-328.
    3. Liu, S. & Sakr, M., 2013. "A comprehensive review on passive heat transfer enhancements in pipe exchangers," Renewable and Sustainable Energy Reviews, Elsevier, vol. 19(C), pages 64-81.
    4. Aharwal, K.R. & Gandhi, B.K. & Saini, J.S., 2008. "Experimental investigation on heat-transfer enhancement due to a gap in an inclined continuous rib arrangement in a rectangular duct of solar air heater," Renewable Energy, Elsevier, vol. 33(4), pages 585-596.
    5. Agung Tri Wijayanta & Muhammad Aziz & Keishi Kariya & Akio Miyara, 2018. "Numerical Study of Heat Transfer Enhancement of Internal Flow Using Double-Sided Delta-Winglet Tape Insert," Energies, MDPI, vol. 11(11), pages 1-15, November.
    6. Lee, Dong Hyun & Rhee, Dong-Ho & Kim, Kyung Min & Cho, Hyung Hee & Moon, Hee Koo, 2009. "Detailed measurement of heat/mass transfer with continuous and multiple V-shaped ribs in rectangular channel," Energy, Elsevier, vol. 34(11), pages 1770-1778.
    7. Karwa, Rajendra & Solanki, S.C & Saini, J.S, 2001. "Thermo-hydraulic performance of solar air heaters having integral chamfered rib roughness on absorber plates," Energy, Elsevier, vol. 26(2), pages 161-176.
    Full references (including those not matched with items on IDEAS)

    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. 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).
    2. Bhushan, Brij & Singh, Ranjit, 2010. "A review on methodology of artificial roughness used in duct of solar air heaters," Energy, Elsevier, vol. 35(1), pages 202-212.
    3. Singh Yadav, Anil & Kumar Thapak, Manish, 2014. "Artificially roughened solar air heater: Experimental investigations," Renewable and Sustainable Energy Reviews, Elsevier, vol. 36(C), pages 370-411.
    4. Luna, D. & Nadeau, J.-P. & Jannot, Y., 2009. "Solar timber kilns: State of the art and foreseeable developments," Renewable and Sustainable Energy Reviews, Elsevier, vol. 13(6-7), pages 1446-1455, August.
    5. 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).
    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.
    7. Kim, Kyung Min & Kim, Beom Seok & Lee, Dong Hyun & Moon, Hokyu & Cho, Hyung Hee, 2010. "Optimal design of transverse ribs in tubes for thermal performance enhancement," Energy, Elsevier, vol. 35(6), pages 2400-2406.
    8. Sahu, Mukesh Kumar & Prasad, Radha Krishna, 2017. "Thermohydraulic performance analysis of an arc shape wire roughened solar air heater," Renewable Energy, Elsevier, vol. 108(C), pages 598-614.
    9. Patil, Anil Kumar, 2015. "Heat transfer mechanism and energy efficiency of artificially roughened solar air heaters—A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 42(C), pages 681-689.
    10. 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.
    11. Chamoli, Sunil & Thakur, N.S. & Saini, J.S., 2012. "A review of turbulence promoters used in solar thermal systems," Renewable and Sustainable Energy Reviews, Elsevier, vol. 16(5), pages 3154-3175.
    12. Alam, Tabish & Kim, Man-Hoe, 2017. "A critical review on artificial roughness provided in rectangular solar air heater duct," Renewable and Sustainable Energy Reviews, Elsevier, vol. 69(C), pages 387-400.
    13. 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.
    14. Junjie Zhao & Bin Zhang & Xiaoli Fu & Shenglin Yan, 2021. "Numerical Study on the Influence of Vortex Generator Arrangement on Heat Transfer Enhancement of Oil-Cooled Motor," Energies, MDPI, vol. 14(21), pages 1-17, October.
    15. Singh, Simarpreet, 2017. "Performance evaluation of a novel solar air heater with arched absorber plate," Renewable Energy, Elsevier, vol. 114(PB), pages 879-886.
    16. Ahadi, Mohammad & Abbassi, Abbas, 2015. "Entropy generation analysis of laminar forced convection through uniformly heated helical coils considering effects of high length and heat flux and temperature dependence of thermophysical properties," Energy, Elsevier, vol. 82(C), pages 322-332.
    17. 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.
    18. Hwang, Sang Dong & Kwon, Hyun Goo & Cho, Hyung Hee, 2010. "Local heat transfer and thermal performance on periodically dimple-protrusion patterned walls for compact heat exchangers," Energy, Elsevier, vol. 35(12), pages 5357-5364.
    19. Olga Arsenyeva & Leonid Tovazhnyanskyy & Petro Kapustenko & Jiří Jaromír Klemeš & Petar Sabev Varbanov, 2023. "Review of Developments in Plate Heat Exchanger Heat Transfer Enhancement for Single-Phase Applications in Process Industries," Energies, MDPI, vol. 16(13), pages 1-28, June.
    20. 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.

    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:gam:jeners:v:12:y:2019:i:12:p:2341-:d:241007. 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: MDPI Indexing Manager (email available below). General contact details of provider: https://www.mdpi.com .

    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.