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Semi-industrial continuous band microwave dryer for energy and exergy analyses, mathematical modeling of paddy drying and it's qualitative study

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

Abstract

The aims of this research are to investigate the energy and exergy analyses for continuous band microwave dryer and qualitative changes of the crop during drying. A semi-industrial continuous microwave dryer was fabricated. The penetration depth of microwave's waves, the percentage of grain breakage, mathematical modeling, effective moisture diffusivity, and specific energy consumption were obtained and energy and exergy analyses were done. The results showed that energy efficiency and exergy efficiency at the same powers increased by increasing the thickness of grain layers. In the same layers with increasing the microwave power, energy efficiency and exergy efficiency were reduced. In layers with the same thickness, increasing in power of microwave increased the specific energy consumption. The models of Wang and Page showed the best fit for layer 6 mm and the model of Lewis indicated best fit for layer 12 mm and for layer 18 mm, the model of Wang was considered as the best model. The breakage of the paddy grains was increased with increasing the rate of changes in moisture ratio and increased energy absorption. Finally, the power of 90 W and thickness of 18 mm for the layer of paddy is recommended.

Suggested Citation

  • Jafari, Hassan & Kalantari, Davood & Azadbakht, Mohsen, 2017. "Semi-industrial continuous band microwave dryer for energy and exergy analyses, mathematical modeling of paddy drying and it's qualitative study," Energy, Elsevier, vol. 138(C), pages 1016-1029.
    • Handle: RePEc:eee:energy:v:138:y:2017:i:c:p:1016-1029
    DOI: 10.1016/j.energy.2017.07.111
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    References listed on IDEAS

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    1. Sarker, Md. Sazzat Hossain & Ibrahim, Mohd Nordin & Abdul Aziz, Norashikin & Punan, Mohd Salleh, 2015. "Energy and exergy analysis of industrial fluidized bed drying of paddy," Energy, Elsevier, vol. 84(C), pages 131-138.
    2. 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.
    3. Acevedo, Luis & Usón, Sergio & Uche, Javier, 2015. "Local exergy cost analysis of microwave heating systems," Energy, Elsevier, vol. 80(C), pages 437-451.
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    1. 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.
    2. 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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