ENERGY EFFICIENCY AND PERFORMANCE OF A COFFEE GRAIN DRYER USING CONCURRENT AND COUNTER-CURRENT FLOWS

Authors

  • Samuel Martin
  • Jadir Nogueira da Silva
  • Adílio Flauzino de Lacerda Filho
  • Daniel Marçal de Queiroz
  • Fabio Luiz Zanatta

DOI:

https://doi.org/10.13083/reveng.v17i6.138

Keywords:

Pós-colheita, secador, café

Abstract

This study was done to evaluate the performance and energy efficiency of a coffee grain dryer using concurrent and counter-current air flow. The first concurrent flow drying stage was separated from the second counter-current flow stage by a repose chamber. The first drying treatment was characterized by intermittent drying with mixing with the air at 45°C, and the second by intermittent drying with continuous reflux at the air at 70°C. In the first drying system initial and final moisture contents were 33.9 ± 5.0 and 11.8 ± 0.7% (w.b.), respectively, compared to 29.0 ± 3.6 and 11.6 ± 1.0% in the second treatment. The grain temperature remained within the recommended values for coffee. Intermittent drying, with continuous mixing, at 70°C consumed less energy compared to the intermittent drying with intermittent mixing at 45°C, and there was greater specific energy consumption in tests where the drying was concluded in few hours after the repose period.

Downloads

Download data is not yet available.

Downloads

Published

2009-12-17

How to Cite

Martin, S., Silva, J. N. da, Lacerda Filho, A. F. de, Queiroz, D. M. de, & Zanatta, F. L. (2009). ENERGY EFFICIENCY AND PERFORMANCE OF A COFFEE GRAIN DRYER USING CONCURRENT AND COUNTER-CURRENT FLOWS. Engineering in Agriculture, 17(6), 454–461. https://doi.org/10.13083/reveng.v17i6.138

Issue

Vol. 17 No. 6 (2009)

Section

.

License

Authors who publish with this journal agree to the following terms:

The author(s) authorize(s) the publication of the text in the journal;

The author(s) ensure(s) that the contribution is original and unpublished and that it is not in the process of evaluation by another journal;

The journal is not responsible for the views, ideas and concepts presented in articles, and these are the sole responsibility of the author(s);

The publishers reserve the right to make textual adjustments and adapt texts to meet with publication standards.

From submission, the author is fully conceding the paper's patrimonial rights to the publication, but retaining the owner of its moral rights (authorship and paper's identification) according to Creative Commons Attribution-Noncommercial. 

Most read articles by the same author(s)

1 2 3 > >>