African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6849

Full Length Research Paper

Empirical models to describe thin layer drying of lima bean (Phaseolus lunatus L.)

Wilton Pereira da Silva*, Cleide Maria D. P. S. e Silva, Marcos A. A. Lins and Josivanda P. Gomes
Federal University of Campina Grande, PB, Brazil.
Email: [email protected]

  •  Accepted: 29 November 2012
  •  Published: 20 December 2012


Lima bean is a legume produced and consumed in various countries. To reduce post harvest losses and to enable the storage for long periods, an alternative is to dry the product. To describe the drying process, a mathematical model is usually required. In this article, four empirical equations available in the literature were used to simulate thin layer drying kinetics of lima bean at temperatures of 40, 50 and 60°C. The four empirical equations were chosen based on their simplicity, involving only one or two fitting parameters. The statistical indicators showed that the Page and Silva et al. models were the best ones to describe the process. These two empirical equations has helped to deduce an analytical expression for the drying rate and these expressions produce results which can be considered equivalent.


Key words: Drying rate, mathematical model, grain, storage.