Investigating the Effect of Inlet Velocity on Temperature Distribution and Solid Volume Fraction in Fluidized Bed Dryer using CFD

Eflita Yohana, M. Tauviqirrahman, Muh. Ilham Mahawan, Kwang-Hwan Choi, M. Syahreza Al Mulqi

2018

Abstract

Tea leaves drying is a process to stop polyphenol oxidation and reduce the humidity of the leaves by roasting technique. The roasting techniques uses heat which generated from wood burning. The roasting must be monitored carefully so that the leaves are not too dry or even singed. The process of roasting from wood burning (organic material) increasing the levels of Polycyclic Aromatic Hydrocarbon (PAH) of the tea because of the fume from its combustion. Polycyclic Aromatic Hydrocarbon (PAH) is a member of Hydrocarbon which consisting of two or more close aromatic ring structures. Each of structure consist of benzo[a]pyrene. Benzo[a]pyrene formed from the imperfect combustion which are carcinogenic and mutagenic which can cause cancer. One of the ways that can be done to reduce the negative impact of drying with a wood burning is using a fluidized bed dryer (FBD). Fluidized bed dryer is a drying technique by reducing and eliminating humidity on the solid particle and change the humidity to gas (evaporation), in another word, this technique is called convective drying. On the drying technique, water has a role as evaporating fluid (evaporated) and air as gas cleaner. This research aims to analyze the effect of velocity variation on temperature and solid volume fraction distribution. This research uses Computational Fluid Dynamics (CFD) software in 2D modelling with a constant temperature at 130 ˚C and varying velocity at 1.152 m/s, 1.536 m/s, 1.728 m/s and 1.8 m/s to get the average particle temperature distribution. Simulation results obtained error on temperature distribution of particles with an average error of 0.67625%. Solid volume fraction contour, velocity contour, and temperature distribution contour show that the optimum velocity of fluidization and particle temperature distribution optimum velocity is 1.728 m/s.

Paper Citation

in Harvard Style

Yohana E., Tauviqirrahman M., Mahawan M., Choi K. and Mulqi M. (2018). Investigating the Effect of Inlet Velocity on Temperature Distribution and Solid Volume Fraction in Fluidized Bed Dryer using CFD.In Proceedings of the 7th Engineering International Conference on Education, Concept and Application on Green Technology - Volume 1: EIC, ISBN 978-989-758-411-4, pages 21-28. DOI: 10.5220/0009005800210028

in Bibtex Style

@conference{eic18,
author={Eflita Yohana and M. Tauviqirrahman and Muh. Ilham Mahawan and Kwang-Hwan Choi and M. Syahreza Al Mulqi},
title={Investigating the Effect of Inlet Velocity on Temperature Distribution and Solid Volume Fraction in Fluidized Bed Dryer using CFD},
booktitle={Proceedings of the 7th Engineering International Conference on Education, Concept and Application on Green Technology - Volume 1: EIC,},
year={2018},
pages={21-28},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0009005800210028},
isbn={978-989-758-411-4},
}

in EndNote Style

TY - CONF

JO - Proceedings of the 7th Engineering International Conference on Education, Concept and Application on Green Technology - Volume 1: EIC,
TI - Investigating the Effect of Inlet Velocity on Temperature Distribution and Solid Volume Fraction in Fluidized Bed Dryer using CFD
SN - 978-989-758-411-4
AU - Yohana E.
AU - Tauviqirrahman M.
AU - Mahawan M.
AU - Choi K.
AU - Mulqi M.
PY - 2018
SP - 21
EP - 28
DO - 10.5220/0009005800210028