IDEAS home Printed from https://ideas.repec.org/a/gam/jeners/v16y2022i1p441-d1020444.html
   My bibliography  Save this article

Study on Intermittent Microwave Convective Drying Characteristics and Flow Field of Porous Media Food

Author

Listed:
  • Yu Man

    (School of Materials and Energy, Guangdong University of Technology, Guangzhou 511400, China)

  • Junjie Tong

    (School of Naval Architecture and Ocean Engineering, Guangzhou Maritime University, Guangzhou 510700, China)

  • Tingyu Wang

    (School of Naval Architecture and Ocean Engineering, Guangzhou Maritime University, Guangzhou 510700, China)

  • Shuxiang Wang

    (School of Naval Architecture and Ocean Engineering, Guangzhou Maritime University, Guangzhou 510700, China)

  • Hu Xu

    (School of Naval Architecture and Ocean Engineering, Guangzhou Maritime University, Guangzhou 510700, China)

Abstract

Numerical simulations were carried out for moist, porous media, intermittent microwave convective drying (IMCD) using a multiphase flow model in porous media subdomains coupled with a forced-convection heat-transfer model in an external hot air subdomain. The models were solved by using COMSOL Multiphysics was applied at the pulse ratio (PR) of 3. Based on drying characteristics of porous media and the distribution of the evaporation interface, IMCD was compared with convection drying (CD). Drying uniformity K , velocity difference, temperature difference, and humidity difference were introduced to evaluate the performance of three models with different inlets and outlet wall curvature. The numerical results show that as the moisture content of slices was reduced to 3 kg/kg, the drying rate in IMCD was 0.0166–0.02 m/s higher than that in CD, and the total drying time of the former was 81.35% shorter than that of the latter. In the late drying stage of IMCD, the core of the sample still had a high vapor concentration and temperature, which led to the evaporation interface remaining on the surface. The vapor evaporated from the slices can diffuse rapidly to the outside, which is why IMCD is superior to traditional convection drying. Through the comprehensive analysis of the models with different inlet and outlet wall curvatures, the drying uniformity K of the type III was the highest, reaching 89.28%. Optimizing flow-field distribution can improve uniform of airflow distribution.

Suggested Citation

  • Yu Man & Junjie Tong & Tingyu Wang & Shuxiang Wang & Hu Xu, 2022. "Study on Intermittent Microwave Convective Drying Characteristics and Flow Field of Porous Media Food," Energies, MDPI, vol. 16(1), pages 1-16, December.
    • Handle: RePEc:gam:jeners:v:16:y:2022:i:1:p:441-:d:1020444
    as

    Download full text from publisher

    File URL: https://www.mdpi.com/1996-1073/16/1/441/pdf
    Download Restriction: no
    File URL: https://www.mdpi.com/1996-1073/16/1/441/
    Download Restriction: no
    ---><---

    References listed on IDEAS

    as
    1. Win-Jet Luo & Cheng-Yan Lin & Nai-Feng Wu & Zhi-Qun Xu, 2020. "Performance Enhancement of a Sludge Continuous Feed Heat Pump Drying System by Air Deflectors and Auxiliary Cooling Subsystems," Energies, MDPI, vol. 13(24), pages 1-22, December.
    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. Hai-Bo Zhao & Kun Wu & Jing-Feng Zhang, 2021. "Simulation Study on Active Air Flow Distribution Characteristics of Closed Heat Pump Drying System with Waste Heat Recovery," Energies, MDPI, vol. 14(19), pages 1-19, October.

    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:16:y:2022:i:1:p:441-:d:1020444. 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.