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Thermodynamic analysis of the drying process of bananas in a small-scale solar updraft tower in Brazil

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  • Maia, Cristiana Brasil
  • Ferreira, André Guimarães
  • Cabezas-Gómez, Luben
  • de Oliveira Castro Silva, Janaína
  • de Morais Hanriot, Sérgio

Abstract

This paper presents a thermodynamic analysis of the drying of bananas inside a small-scale prototype solar updraft tower in Belo Horizonte, Brazil. A model based on the first and second laws of thermodynamics was developed, using the ambient conditions and airflow parameters data obtained in the experimental prototype. The exergy rates were determined, and it was concluded that the incident solar radiation plays an important role on the drying process of bananas, the higher the solar radiation, the higher the exergy rates. The exergetic efficiency was compared to that obtained without products inside the solar updraft tower, and it was found that the exergetic efficiency increased from about 20% to 27% with load.

Suggested Citation

  • Maia, Cristiana Brasil & Ferreira, André Guimarães & Cabezas-Gómez, Luben & de Oliveira Castro Silva, Janaína & de Morais Hanriot, Sérgio, 2017. "Thermodynamic analysis of the drying process of bananas in a small-scale solar updraft tower in Brazil," Renewable Energy, Elsevier, vol. 114(PB), pages 1005-1012.
    • Handle: RePEc:eee:renene:v:114:y:2017:i:pb:p:1005-1012
    DOI: 10.1016/j.renene.2017.07.102
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    Cited by:

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    3. Barbosa, Eloiny Guimarães & Araujo, Marcos Eduardo Viana de & Lopes, Roberto Precci & Martins, Marcio Arêdes & Moraes, Maria Joselma de & Barbosa, Elisa Guimarães & Falconí, Javier Hernán Heredia, 2020. "Exergetic, economic and environmental (3E) analysis of a low cost solar heater in different configurations," Renewable Energy, Elsevier, vol. 160(C), pages 1096-1104.
    4. Atalay, Halil, 2019. "Comparative assessment of solar and heat pump dryers with regards to exergy and exergoeconomic performance," Energy, Elsevier, vol. 189(C).
    5. Kuan, M. & Shakir, Ye. & Mohanraj, M. & Belyayev, Ye. & Jayaraj, S. & Kaltayev, A., 2019. "Numerical simulation of a heat pump assisted solar dryer for continental climates," Renewable Energy, Elsevier, vol. 143(C), pages 214-225.

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