A study of drying uniformity in a new design of tray dryer

Research output: Contribution to journalArticle

Abstract

Application of tray dryer is widely used in agricultural drying because of its simple design and capability to dry products at high volume. However, the greatest drawback of the tray dryer is uneven drying because of poor airflow distribution in the drying chamber. This study investigates kenaf core drying uniformity in a tray dryer through Computational Fluid Dynamics (CFD) simulation. The simulation focused on air velocity above the products and was conducted under steady state condition to simplify the analysis. The experimental and simulation data exhibit very good agreement. The drying rate of dried products in each tray predicted based on average air velocity from the simulation. The result shows that, the higher the air velocity, the higher the drying rate of the products. The alternate arrangement of tray position adopted to ensure that all trays are exposed directly to drying air and to improve airflow distribution in drying chamber. There was a variation of final moisture content for product at different columns. However, the uniformity of air flow distribution to each level of product at the same column are acceptable. Drying using semi-continuous mode was recommended to improve drying time and uniformity.

Original languageEnglish
Pages (from-to)129-138
Number of pages10
JournalJournal of Advanced Research in Fluid Mechanics and Thermal Sciences
Volume52
Issue number2
Publication statusPublished - 1 Dec 2018

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Drying
Air
Computational fluid dynamics
Moisture
Computer simulation

Keywords

  • Drying simulation
  • Kenaf core drying
  • Tray dryer

ASJC Scopus subject areas

  • Fluid Flow and Transfer Processes

Cite this

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title = "A study of drying uniformity in a new design of tray dryer",
abstract = "Application of tray dryer is widely used in agricultural drying because of its simple design and capability to dry products at high volume. However, the greatest drawback of the tray dryer is uneven drying because of poor airflow distribution in the drying chamber. This study investigates kenaf core drying uniformity in a tray dryer through Computational Fluid Dynamics (CFD) simulation. The simulation focused on air velocity above the products and was conducted under steady state condition to simplify the analysis. The experimental and simulation data exhibit very good agreement. The drying rate of dried products in each tray predicted based on average air velocity from the simulation. The result shows that, the higher the air velocity, the higher the drying rate of the products. The alternate arrangement of tray position adopted to ensure that all trays are exposed directly to drying air and to improve airflow distribution in drying chamber. There was a variation of final moisture content for product at different columns. However, the uniformity of air flow distribution to each level of product at the same column are acceptable. Drying using semi-continuous mode was recommended to improve drying time and uniformity.",
keywords = "Drying simulation, Kenaf core drying, Tray dryer",
author = "Suhaimi Misha and Sohif Mat and Ruslan, {Mohd Hafidz} and Salleh, {Elias @ Ilias} and Kamaruzzaman Sopian",
year = "2018",
month = "12",
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language = "English",
volume = "52",
pages = "129--138",
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AU - Misha, Suhaimi

AU - Mat, Sohif

AU - Ruslan, Mohd Hafidz

AU - Salleh, Elias @ Ilias

AU - Sopian, Kamaruzzaman

PY - 2018/12/1

Y1 - 2018/12/1

N2 - Application of tray dryer is widely used in agricultural drying because of its simple design and capability to dry products at high volume. However, the greatest drawback of the tray dryer is uneven drying because of poor airflow distribution in the drying chamber. This study investigates kenaf core drying uniformity in a tray dryer through Computational Fluid Dynamics (CFD) simulation. The simulation focused on air velocity above the products and was conducted under steady state condition to simplify the analysis. The experimental and simulation data exhibit very good agreement. The drying rate of dried products in each tray predicted based on average air velocity from the simulation. The result shows that, the higher the air velocity, the higher the drying rate of the products. The alternate arrangement of tray position adopted to ensure that all trays are exposed directly to drying air and to improve airflow distribution in drying chamber. There was a variation of final moisture content for product at different columns. However, the uniformity of air flow distribution to each level of product at the same column are acceptable. Drying using semi-continuous mode was recommended to improve drying time and uniformity.

AB - Application of tray dryer is widely used in agricultural drying because of its simple design and capability to dry products at high volume. However, the greatest drawback of the tray dryer is uneven drying because of poor airflow distribution in the drying chamber. This study investigates kenaf core drying uniformity in a tray dryer through Computational Fluid Dynamics (CFD) simulation. The simulation focused on air velocity above the products and was conducted under steady state condition to simplify the analysis. The experimental and simulation data exhibit very good agreement. The drying rate of dried products in each tray predicted based on average air velocity from the simulation. The result shows that, the higher the air velocity, the higher the drying rate of the products. The alternate arrangement of tray position adopted to ensure that all trays are exposed directly to drying air and to improve airflow distribution in drying chamber. There was a variation of final moisture content for product at different columns. However, the uniformity of air flow distribution to each level of product at the same column are acceptable. Drying using semi-continuous mode was recommended to improve drying time and uniformity.

KW - Drying simulation

KW - Kenaf core drying

KW - Tray dryer

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