Effects of airflow reversal in fixed-bed drying of rough rice on head rice yield and drying performance

M. N. Ibrahim, K. Tajaddodi Talab, S. Spotar, K. Muhammad, R. A. Talib

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Conventional (single-direction airflow) fixed-bed drying of rough rice results in reduced grain quality from over-drying of grain in the bottom layers of the dryer. To address this problem, drying of rough rice with airflow reversal was studied for improving grain quality and drying performance. The results showed that airflow reversal drying increased drying capacity by at least 20% at every bed depth studied, compared to conventional drying. Increasing the grain bed depth also caused drying capacity to increase; however, doing so resulted in decreased head rice yield (HRY) and increased energy consumption. Depending on the grain bed depth and airflow rate, energy use was reduced by 12% to 32% in airflow reversal drying compared to conventional drying. Airflow reversal drying with a 50 cm grain bed depth was found suitable for achieving acceptable drying performance with the least quality loss. Overall results indicated that increases in fissure formation, with subsequent HRY reduction, could be avoided in airflow reversal drying provided that drying parameters were properly chosen.

Original languageEnglish
Pages (from-to)1485-1493
Number of pages9
JournalTransactions of the ASABE
Volume56
Issue number4
DOIs
Publication statusPublished - 2013

Fingerprint

rough rice
air flow
airflow
Drying
rice
drying
Head
effect
Oryza
dryers
energy use
fissure

Keywords

  • Airflow reversal
  • Drying
  • Drying capacity
  • Effective heat efficiency
  • Energy usage
  • Fixed bed
  • HRY

ASJC Scopus subject areas

  • Agronomy and Crop Science
  • Biomedical Engineering
  • Food Science
  • Forestry
  • Soil Science

Cite this

Effects of airflow reversal in fixed-bed drying of rough rice on head rice yield and drying performance. / Ibrahim, M. N.; Tajaddodi Talab, K.; Spotar, S.; Muhammad, K.; Talib, R. A.

In: Transactions of the ASABE, Vol. 56, No. 4, 2013, p. 1485-1493.

Research output: Contribution to journalArticle

Ibrahim, M. N. ; Tajaddodi Talab, K. ; Spotar, S. ; Muhammad, K. ; Talib, R. A. / Effects of airflow reversal in fixed-bed drying of rough rice on head rice yield and drying performance. In: Transactions of the ASABE. 2013 ; Vol. 56, No. 4. pp. 1485-1493.
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