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Energy consumption and qualitative evaluation of a continuous band microwave dryer for rice paddy drying

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  • Jafari, Hassan
  • Kalantari, Davood
  • Azadbakht, Mohsen

Abstract

In this study, a laboratory scale continuous-band microwave dryer was fabricated and used for drying the paddy. The experiments were carried out at 3 microwave powers (90, 270, and 450 W), conveyor speed 0.24 m/min, and 3 paddy layer thicknesses (6, 12, and 18 mm). The penetration depth of the waves into the examined paddy was obtained equal to 12.7 mm at 25.46% moisture content (w.b %). The maximum energy absorption (81.46%) was obtained at 90 W power and 18 mm layer, whereas the minimum energy absorption was obtained equal to 34.90% at 6 mm paddy thickness and 270 W microwave power. The obtained results indicated that the maximum energy efficiency, the maximum thermal efficiency, the maximum drying efficiency, the minimum specific energy consumption, and the minimum seed breakage percent occurred at 90 W microwave power and 18 mm drying thickness. Therefore as a final concluding result, drying thickness of 18 mm and microwave power of 90 W was selected as the most appropriate combination for drying paddy using the continuous band microwave dryer.

Suggested Citation

  • Jafari, Hassan & Kalantari, Davood & Azadbakht, Mohsen, 2018. "Energy consumption and qualitative evaluation of a continuous band microwave dryer for rice paddy drying," Energy, Elsevier, vol. 142(C), pages 647-654.
    • Handle: RePEc:eee:energy:v:142:y:2018:i:c:p:647-654
    DOI: 10.1016/j.energy.2017.10.065
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    References listed on IDEAS

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    1. Ranjbaran, M. & Zare, D., 2013. "Simulation of energetic- and exergetic performance of microwave-assisted fluidized bed drying of soybeans," Energy, Elsevier, vol. 59(C), pages 484-493.
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    1. Sánchez, Juan R. & Gutiérrez-Cano, José D. & Plaza-González, Pedro J. & Penaranda-Foix, Felipe L. & Catalá-Civera, José M., 2023. "Microwave calorimeter for dielectric and thermal analysis of materials," Energy, Elsevier, vol. 263(PD).
    2. Safoura Zadhossein & Yousef Abbaspour-Gilandeh & Mohammad Kaveh & Mariusz Szymanek & Esmail Khalife & Olusegun D. Samuel & Milad Amiri & Jacek Dziwulski, 2021. "Exergy and Energy Analyses of Microwave Dryer for Cantaloupe Slice and Prediction of Thermodynamic Parameters Using ANN and ANFIS Algorithms," Energies, MDPI, vol. 14(16), pages 1-19, August.
    3. Panda, Brajesh Kumar & Mishra, Gayatri & Panigrahi, Shubham Subrot & Shrivastava, Shanker Lal, 2021. "Microwave-assisted parboiling of high moisture paddy: A comparative study based on energy utilization, process economy and grain quality with conventional parboiling," Energy, Elsevier, vol. 232(C).

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