Hydrodynamics investigation of pepper drying in a swirling fluidized bed dryer with multiple-group twisted tape swirl generators
The present work aims to investigation the behavior of drying peppers in a swirling fluidized bed dryer (S-FBD) fitted with multiple twisted tape swirl generators. A multiple-group twisted tape swirl generator was located at the air inlet at the bottom of the bed. The effects of the superficial air...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2019-03-01
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| Series: | Case Studies in Thermal Engineering |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214157X18303083 |
| _version_ | 1819237236168720384 |
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| author | V. Chuwattanakul S. Eiamsa-ard |
| author_facet | V. Chuwattanakul S. Eiamsa-ard |
| author_sort | V. Chuwattanakul |
| collection | DOAJ |
| description | The present work aims to investigation the behavior of drying peppers in a swirling fluidized bed dryer (S-FBD) fitted with multiple twisted tape swirl generators. A multiple-group twisted tape swirl generator was located at the air inlet at the bottom of the bed. The effects of the superficial air velocity (U*=U/Umf = 1.0, 1.1 and 1.2) on the moisture content (MC), moisture content ratio (MR) and drying rate (DR) were examined. The experimental results showed that the S-FBD can reduce the moisture content of peppers more rapidly than a conventional fluidized bed dryer (FBD). The S-FBD gave a higher DR and decreased drying time compared to that of a FBD. The results also indicated that operation at higher superficial air velocities resulted in a greater DR, especially at the beginning stage of the drying process. For the S-FBD, the reduced of MC, MR and DR at a high superficial air velocity (U*=U/Umf = 1.2) was better than at low superficial air velocities (U* = 1.0 and 1.1). Furthermore, five different drying models were evaluated to predict the performance of the S-FBD. Keywords: Drying, Swirl flow, Conventional fluidized bed dryer (FBD), Drying rate (DR), Swirling fluidized bed dryer (S-FBD), Pepper |
| first_indexed | 2024-12-23T13:17:07Z |
| format | Article |
| id | doaj.art-b5bc4cf141b84a70b0a412fd24a0de37 |
| institution | Directory Open Access Journal |
| issn | 2214-157X |
| language | English |
| last_indexed | 2024-12-23T13:17:07Z |
| publishDate | 2019-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Thermal Engineering |
| spelling | doaj.art-b5bc4cf141b84a70b0a412fd24a0de372022-12-21T17:45:33ZengElsevierCase Studies in Thermal Engineering2214-157X2019-03-0113Hydrodynamics investigation of pepper drying in a swirling fluidized bed dryer with multiple-group twisted tape swirl generatorsV. Chuwattanakul0S. Eiamsa-ard1Department of Food Engineering, Faculty of Engineering, King Mongkut's Institute of Technology Ladkrabang, Bangkok 10520, Thailand; Corresponding author.Department of Mechanical Engineering, Faculty of Engineering, Mahanakorn University of Technology, Bangkok 10530, ThailandThe present work aims to investigation the behavior of drying peppers in a swirling fluidized bed dryer (S-FBD) fitted with multiple twisted tape swirl generators. A multiple-group twisted tape swirl generator was located at the air inlet at the bottom of the bed. The effects of the superficial air velocity (U*=U/Umf = 1.0, 1.1 and 1.2) on the moisture content (MC), moisture content ratio (MR) and drying rate (DR) were examined. The experimental results showed that the S-FBD can reduce the moisture content of peppers more rapidly than a conventional fluidized bed dryer (FBD). The S-FBD gave a higher DR and decreased drying time compared to that of a FBD. The results also indicated that operation at higher superficial air velocities resulted in a greater DR, especially at the beginning stage of the drying process. For the S-FBD, the reduced of MC, MR and DR at a high superficial air velocity (U*=U/Umf = 1.2) was better than at low superficial air velocities (U* = 1.0 and 1.1). Furthermore, five different drying models were evaluated to predict the performance of the S-FBD. Keywords: Drying, Swirl flow, Conventional fluidized bed dryer (FBD), Drying rate (DR), Swirling fluidized bed dryer (S-FBD), Pepperhttp://www.sciencedirect.com/science/article/pii/S2214157X18303083 |
| spellingShingle | V. Chuwattanakul S. Eiamsa-ard Hydrodynamics investigation of pepper drying in a swirling fluidized bed dryer with multiple-group twisted tape swirl generators Case Studies in Thermal Engineering |
| title | Hydrodynamics investigation of pepper drying in a swirling fluidized bed dryer with multiple-group twisted tape swirl generators |
| title_full | Hydrodynamics investigation of pepper drying in a swirling fluidized bed dryer with multiple-group twisted tape swirl generators |
| title_fullStr | Hydrodynamics investigation of pepper drying in a swirling fluidized bed dryer with multiple-group twisted tape swirl generators |
| title_full_unstemmed | Hydrodynamics investigation of pepper drying in a swirling fluidized bed dryer with multiple-group twisted tape swirl generators |
| title_short | Hydrodynamics investigation of pepper drying in a swirling fluidized bed dryer with multiple-group twisted tape swirl generators |
| title_sort | hydrodynamics investigation of pepper drying in a swirling fluidized bed dryer with multiple group twisted tape swirl generators |
| url | http://www.sciencedirect.com/science/article/pii/S2214157X18303083 |
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