Heat and mass transfer analysis of tea particles in low-temperature spray dryers using a combination of swirl and Co-current flows
Tea solutions contains antioxidants in the form of catechins which sensitive to heat. This study explores combining co-current and swirl flow patterns within the drying chamber to achieve efficient, low-temperature drying processes. The research uses Computational Fluid Dynamics (CFD) to study heat...
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| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-07-01
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| Series: | Case Studies in Thermal Engineering |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214157X25003764 |
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| Summary: | Tea solutions contains antioxidants in the form of catechins which sensitive to heat. This study explores combining co-current and swirl flow patterns within the drying chamber to achieve efficient, low-temperature drying processes. The research uses Computational Fluid Dynamics (CFD) to study heat and mass transfer characteristics in a spray dryer, focusing on different flow compositions of swirl and co-current flows at ratios of 25 %:75 %, 50 %:50 %, and 75 %:25 %. This research also examines variations in hot air inlet temperature (80 °C, 70 °C, and 60 °C). Key parameters, including temperature and mass fractions of water and water vapor, serve as indicators for evaluating transfer efficiency. Findings indicate configurations with a predominant swirl flow of 75 % at 80 °C yield the most favorable outcomes, with a significant temperature drop of 34.141 °C and 93.59 % evaporation of H2O(l) particles. Conversely, configurations with a predominant co-current flow of 75 % exhibit lower efficiency, with a temperature decrease of 29.599 °C and 84.80 % evaporation of H2O(l) particles. |
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| ISSN: | 2214-157X |