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105753

EVALUATION OF THREE EVAPORATIVE COOLING PADS FROM AGRICULTURAL WASTES

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Last updated: 04 Jan 2025

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Biosystems Engineering

Abstract

A Gable even span greenhouse 3 × 2 × 2.6 m was constructed. This greenhouse was equipped with an evaporative cooling system. Three waste materials were used as pads for this system. These materials are: Flax plant residues, Luffa plant residues and the third material was a combination of the two materials. Each pad material was tested under three thicknesses. These thicknesses are 4, 8 and 12 cm. Each thickness for each of the three materials was tested under three velocities. These velocities are 0.45, 0.65 and 0.90 m/s. The experiments were carried out during august 2008 where the mean ambient temperature was 35.8 oC and the mean relative humidity was 39.6 %. Mean cool temperatures at the pads were 25.5, 25.9 and 26.6 oC for Flax plant residues, Luffa Plan residues and the combined material respectively. Highest cooling efficiency was 97.7 % when using Flax plant residues pad material with thickness 12 cm at pad face air velocity 0.65 m/s. For Luffa material the highest cooling efficiency was 91% at used pad thickness 12 cm and pad face air velocity 0.45 m/s. For the Combined material the highest cooling efficiency was 94.4 % at used pad thickness 12 cm and pad face air velocity 0.45 m/s. The research concluded to that the recommended pad is Flax and the recommended thickness for the system is 12 cm and the recommended pad face velocity is 0.45 m/s. The correcting Length factor “K" for the greenhouses of length “L" where:  was determined roughly by the eye carve fitting.

DOI

10.21608/mjae.2010.105753

Authors

First Name

S. A.

Last Name

Tayel

MiddleName

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Affiliation

Prof., Agr. Eng. Dept., Fac. of Agr., AL-Azhar Univ., Egypt.

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Orcid

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First Name

M. A.

Last Name

Mosallam

MiddleName

-

Affiliation

Assoc. Prof., Agr. Eng. Dept., Fac. of Agr., AL-Azhar Univ., Egypt.

Email

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City

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Orcid

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First Name

A. M.

Last Name

Mousa

MiddleName

-

Affiliation

Demonstrator, Agr. Eng. Dept., Fac. of Agr., AL-Azhar Univ., Egypt.

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Volume

27

Article Issue

3

Related Issue

15956

Issue Date

2010-07-01

Receive Date

2020-07-29

Publish Date

2010-07-01

Page Start

924

Page End

942

Print ISSN

1687-384X

Online ISSN

2636-3062

Article File

MJAE_Volume 27_Issue 3_Pages 924-942.pdf

PDF . 695.3kB

Link

https://mjae.journals.ekb.eg/article_105753.html

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https://mjae.journals.ekb.eg/service?article_code=105753

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Original Article

Type Code

1,326

Publication Type

Journal

Publication Title

Misr Journal of Agricultural Engineering

Publication Link

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

MainTitle

EVALUATION OF THREE EVAPORATIVE COOLING PADS FROM AGRICULTURAL WASTES

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Article

Created At

23 Jan 2023