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105394

A NATURAL CONVECTION SOLAR DRYER FOR ROUGH RICE

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Last updated: 26 Dec 2024

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Tags

Processing Engineering of Agricultural Products

Abstract

A solar drying system was constructed and tested to dry rough rice grains for seeding under Zagazig city prevailing weather conditions. The system consists of two integrated units, a solar collector with total area of 1.8 m2 attached to a drying chamber. The system is classified as a natural convection indirect passive cabinet type without any moving parts. The study parameters included varying the air inlet area from 244 to 732 cm2, testing three levels of initial moisture contents (20, 22, and 25% w.b.), and two different grain layer thicknesses of 5 and 10 cm. The system was operated from 8 AM to 5 PM under Zagazig local conditions (Latitude 30.5° N) for 2 weeks during the rice harvesting season of 2009. The results showed that the smallest air inlet area of 244 cm2 gave the highest collector thermal efficiency, the highest temperature difference between ambient air and heated air inside the collector, and highest drying rate. Also the initial moisture content of 20% w.b. gave the highest drying rate and fastest drying time. Same results were found using layer thickness of 5 cm. So the combination of 244 cm2 air inlet area, 5 cm layer thickness, and 20% initial moisture content is recommended for the best thermal performance and highest drying rate. 

DOI

10.21608/mjae.2011.105394

Keywords

solar energy, indirect passive cabinet, rough rice, Natural convection, Drying rate, Thermal Efficiency

Authors

First Name

A. M.

Last Name

Kishta

MiddleName

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Affiliation

Assistant prof. Dept. of Agric. Eng., Fac. of Agric. Zagazig Univ., Egypt.

Email

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City

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Orcid

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First Name

M. A.

Last Name

Tawfik

MiddleName

-

Affiliation

Lecturer, Dept. of Agric. Eng., Fac. of Agric. Zagazig Univ., Egypt.

Email

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City

-

Orcid

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First Name

H. M.

Last Name

El-Shal

MiddleName

-

Affiliation

Lecturer, Dept. of Agric. Eng., Fac. of Agric. Zagazig Univ., Egypt.

Email

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City

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Orcid

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Volume

28

Article Issue

1

Related Issue

15951

Issue Date

2011-01-01

Receive Date

2020-07-27

Publish Date

2011-01-01

Page Start

201

Page End

215

Print ISSN

1687-384X

Online ISSN

2636-3062

Article File

MJAE_Volume 28_Issue 1_Pages 201-215.pdf

PDF . 731.4kB

Link

https://mjae.journals.ekb.eg/article_105394.html

Detail API

https://mjae.journals.ekb.eg/service?article_code=105394

Order

12

Type

Original Article

Type Code

1,326

Publication Type

Journal

Publication Title

Misr Journal of Agricultural Engineering

Publication Link

https://mjae.journals.ekb.eg/

MainTitle

A NATURAL CONVECTION SOLAR DRYER FOR ROUGH RICE

Details

Type

Article

Created At

23 Jan 2023