Simulation Study for Pneumatic Conveying Drying of Sawdust for Pellet Production

Temperature and Air Velocity Simulation on Sago Starch Pneumatic Conveying Recirculated Dryer Using Ansys Fluent

“…In this study, the temperature value along the vertical and u-bend pipes of PCRD machine were: T1 (0 m) 75 C; T2 (2.25 m) 74,1 C; T3 (4,5 m) 73,8 C; T4 (5,1 m) 73,5 C; T5 (5,7 m) 73,2 C; and T6 (7,8 m) 72,9 C. It indicated that there was reduction along the vertical and u-bend pipes just like the one researched by Bhattarai et al (2014). Figure 5 and Figure 6 showed the output contour and graphic of drying air temperature and speed based on Tu1 variation of 100 C and 125 C.…”

“…The drying air speed inside the vertical and u-bend pipes at the inlet to outlet is around 0 -8.383 m/s. Results of CFD simulation using ansys fluent software version 13 performed by (Bhattarai et al, 2014) based on drying air variation show that the drying air temperature along the vertical pipe of the PCD machine experiences a reduction. In this study, the temperature value along the vertical and u-bend pipes of PCRD machine were: T1 (0 m) 75 C; T2 (2.25 m) 74,1 C; T3 (4,5 m) 73,8 C; T4 (5,1 m) 73,5 C; T5 (5,7 m) 73,2 C; and T6 (7,8 m) 72,9 C.…”

“…However, the most essential component in determining the material recirculation process is the length of vertical pipe and the u-bend, therefore, the focus of this research is on the vertical pipe (upriser and downcomer) and the u-bend. According to (Bhattarai, et al, 2014), on a pneumatic system dryer, the vertical pipe also functions as the main drying chamber, therefore, the temperature distribution and drying air speed in the vertical pipe is determinant for the quality and quantity of drying results. To analyze the temperature distribution and the speed of drying air in the vertical pipe and u-bend of the PCRD machine for drying wet sago starch, a simulation is performed using a computational fluid dynamics (CFD).…”

Development of operation support methods of the drying plant within a cogeneration system

“…Так, наприклад, в роботі [2] перевага віддається сушильним установкам з механічною активацією мате-ріалу, що дозволяє збільшити питому напругу сушки за випарюваною вологістю, але за рахунок додаткових витрат на електричну енергію. В роботі [3] на основі перевірки адекватності розроблених математичних моделей сушки деревини експериментальним дослідженням встановлено вплив конструктивних параметрів сушильної камери на якість сушки, але при вимірюванні параметрів сушки в сушильній камері. В роботі [4] визначено вплив ре-жимних параметрів сушки на якість сушки за рахунок зміни тиску в сушильній камері та терміну сушки, але без можливості узгодження температурного та аеродинаміч-ного режимів сушіння матеріалу.…”

Development of energy-saving technology maintaining the functioning of a drying plant as a part of the cogeneration system

“…In [3], for example, the advantage of mechanical activation of the dried material is determined, but at the expense of the extra costs in electricity. In the work [4] it was determined that the quality of drying is influenced by the structural parameters of a drying chamber, but the assessment was made with the measurement of the drying parameters in the drying chamber. In the work [5], the influence of the modes of drying parameters on the quality of drying was defined without coordinating the thermal and the aerodynamic modes of drying of the material.…”