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Mass Transfer Properties for the Drying of Pears

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Transactions on Engineering Technologies

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Abstract

Portugal is among the tropical countries that have a long tradition of drying fruits, such as figs, grapes or pears. The knowledge of the transfer phenomena involved in drying processes is of major importance for the design and optimization of the most adequate operating conditions. In this way, the present work intended to study the mass transfer properties for the convective air drying of pears, based on the diffusion model. The values of the diffusivity and mass transfer coefficient for the drying of pears of the Portuguese native variety D. Joaquina were determined for two drying temperatures, 60 and 70 °C. The results obtained showed an increase of 38 % in diffusivity and an even more pronounced increase in the mass transfer coefficient, 56 %, for a temperature variation of 10 °C. Regarding the dimensionless numbers, Biot number increased 13 % while Dincer number decreased 28 %.

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Author information

Authors and Affiliations

  1. CI&DETS, Instituto Politécnico de Viseu, ESAV, Quinta da Alagoa, Ranhados, 3500-606, Viseu, Portugal

    Raquel Pinho Ferreira de Guiné

  2. CERNAS-ESAV-IPC/Departamento de Engenharia Química e Biológica, ISEC-IPC, Rua Pedro Nunes, Quinta da Nora, 3030-199, Coimbra, Portugal

    Maria João Barroca

Authors
  1. Raquel Pinho Ferreira de Guiné
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  2. Maria João Barroca
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Corresponding author

Correspondence to Raquel Pinho Ferreira de Guiné .

Editor information

Editors and Affiliations

  1. Department of Multimedia Engineering, College of Engineering, Mokpo National University, Mokpo, Jeonnam, Korea, Republic of (South Korea)

    Gi-Chul Yang

  2. Unit 1, 1/F IAENG Secretariat, International Association of Engine, Hong Kong, Hong Kong SAR

    Sio-Iong Ao

  3. Department of Applied Mathematics and Computing, Cranfield University, Cranfield, Bedfordshire, United Kingdom

    Len Gelman

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de Guiné, R.P.F., Barroca, M.J. (2014). Mass Transfer Properties for the Drying of Pears. In: Yang, GC., Ao, SI., Gelman, L. (eds) Transactions on Engineering Technologies. Springer, Dordrecht. https://doi.org/10.1007/978-94-017-8832-8_20

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  • DOI: https://doi.org/10.1007/978-94-017-8832-8_20

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  • Publisher Name: Springer, Dordrecht

  • Print ISBN: 978-94-017-8831-1

  • Online ISBN: 978-94-017-8832-8

  • eBook Packages: EngineeringEngineering (R0)

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