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Optimization of Vertical Screw Conveyor for Biomass Sampling: Influence of Pitch Geometry on Energy Dissipation and Material Integrity |
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| รหัสดีโอไอ | |
| Creator | Atchara Chaiya |
| Title | Optimization of Vertical Screw Conveyor for Biomass Sampling: Influence of Pitch Geometry on Energy Dissipation and Material Integrity |
| Contributor | Sarawut Pawako, Manat Okchol, Varut Sripaisan, Ninlawan Chaitanoo, Weeranut Intagun, Autchara Junphong |
| Publisher | Rajamangala University of Technology Lanna |
| Publication Year | 2569 |
| Journal Title | RMUTL Engineering Journal |
| Journal Vol. | 11 |
| Journal No. | 1 |
| Page no. | 14-25 |
| Keyword | Vertical Screw Conveyor, Specific Energy Consumption (SEC), Energy Dissipation, Sampling Integrity, Cassava sampling |
| URL Website | https://engsystem.rmutl.ac.th/journal/ |
| ISSN | 3027-7426 |
| Abstract | This study investigates the optimization of vertical screw conveyor design to enhance the efficiency and reliability of automated cassava sampling systems in agro-industrial processing. A comparative analysis was conducted between two screw configurations: Type B (P/D = 0.67) and Type C (P/D = 0.50), with varying screw diameters (0.11-0.20 m) and rotational speeds (56.78, 48.67, and 36.50 rpm for 18-, 21-, and 28-tooth gear sets, respectively) under controlled hydraulic operation (p = 152 bar, Qoil = 4.875×10⁻⁴ m³/s, Pin = 7,410 W). The results indicate that over 99% of the hydraulic input power is theoretically dissipated as heat, based on the first-law energy balance. The Type B configuration, particularly at a diameter of 0.20 m and maximum rotational speed (56.78 rpm), demonstrated superior performance, achieving the lowest Specific Energy Consumption (SEC) of 23.25 kJ/kg, representing a 25.0% reduction in SEC and a 33.4% gain in useful mechanical work output (Pout : 14.07 vs. 10.55 W) over Type C. Furthermore, the wider pitch of Type B effectively mitigates material compaction and reduces cumulative frictional stress during transport, preserving the physical integrity of cassava chips (bulk density: 496.4 ± 62.4 kg/m³; moisture content: 13.5 ± 0.5% w.b.). The study concludes that the Type B configuration is the optimal design for maximizing flow stability and minimizing energy loss while satisfying quality assurance requirements. |
