Effects of Airflow Reversal in Fixed Bed Drying of Rough Rice on HRY and Drying Performance.
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...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English English |
| Published: |
2013
|
| Online Access: | http://psasir.upm.edu.my/id/eprint/28453/ http://psasir.upm.edu.my/id/eprint/28453/1/Effects%20of%20Airflow%20Reversal%20in%20Fixed%20Bed%20Drying%20of%20Rough%20Rice%20on%20HRY%20and%20Drying%20Performance.pdf |
| _version_ | 1848846121351249920 |
|---|---|
| author | Ibrahim, Mohd Nordin Syed Muhammad, Sharifah Kharidah A. Talib, Rosnita Talab, Kobra Tajaddodi Spotar, Sergei |
| author_facet | Ibrahim, Mohd Nordin Syed Muhammad, Sharifah Kharidah A. Talib, Rosnita Talab, Kobra Tajaddodi Spotar, Sergei |
| author_sort | Ibrahim, Mohd Nordin |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | 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. |
| first_indexed | 2025-11-15T08:57:40Z |
| format | Article |
| id | upm-28453 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| language | English English |
| last_indexed | 2025-11-15T08:57:40Z |
| publishDate | 2013 |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-284532015-09-21T07:15:11Z http://psasir.upm.edu.my/id/eprint/28453/ Effects of Airflow Reversal in Fixed Bed Drying of Rough Rice on HRY and Drying Performance. Ibrahim, Mohd Nordin Syed Muhammad, Sharifah Kharidah A. Talib, Rosnita Talab, Kobra Tajaddodi Spotar, Sergei 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. 2013 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/28453/1/Effects%20of%20Airflow%20Reversal%20in%20Fixed%20Bed%20Drying%20of%20Rough%20Rice%20on%20HRY%20and%20Drying%20Performance.pdf Ibrahim, Mohd Nordin and Syed Muhammad, Sharifah Kharidah and A. Talib, Rosnita and Talab, Kobra Tajaddodi and Spotar, Sergei (2013) Effects of Airflow Reversal in Fixed Bed Drying of Rough Rice on HRY and Drying Performance. Transactions of the ASABE, 56 (4). pp. 1485-1493. ISSN 2151-0032 http://dx.doi.org/10.13031/trans.56.9527 English |
| spellingShingle | Ibrahim, Mohd Nordin Syed Muhammad, Sharifah Kharidah A. Talib, Rosnita Talab, Kobra Tajaddodi Spotar, Sergei Effects of Airflow Reversal in Fixed Bed Drying of Rough Rice on HRY and Drying Performance. |
| title | Effects of Airflow Reversal in Fixed Bed Drying of Rough Rice on HRY and Drying Performance. |
| title_full | Effects of Airflow Reversal in Fixed Bed Drying of Rough Rice on HRY and Drying Performance. |
| title_fullStr | Effects of Airflow Reversal in Fixed Bed Drying of Rough Rice on HRY and Drying Performance. |
| title_full_unstemmed | Effects of Airflow Reversal in Fixed Bed Drying of Rough Rice on HRY and Drying Performance. |
| title_short | Effects of Airflow Reversal in Fixed Bed Drying of Rough Rice on HRY and Drying Performance. |
| title_sort | effects of airflow reversal in fixed bed drying of rough rice on hry and drying performance. |
| url | http://psasir.upm.edu.my/id/eprint/28453/ http://psasir.upm.edu.my/id/eprint/28453/ http://psasir.upm.edu.my/id/eprint/28453/1/Effects%20of%20Airflow%20Reversal%20in%20Fixed%20Bed%20Drying%20of%20Rough%20Rice%20on%20HRY%20and%20Drying%20Performance.pdf |