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222190

REDUCING THE THERMAL DEVIATION INSIDE GREENHOUSES BY USING SOLAR HEATING AND EARTH TUBE HEAT EXCHANGER SYSTEMS

Article

Last updated: 04 Jan 2025

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Subjects

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Tags

Agricultural Constructions Engineering

Abstract

Cucumber crops grow best between 18 and 25ºC of indoor air temperatures. When air temperatures fall below 16ºC or exceed 30ºC for extended periods, growth and yield are usually decreased. Therefore, the optimization of microclimatic conditions in greenhouses is particularly important in crop growth, development, and productivity. In this study, an attempt has been made to analyze the thermal performance of the solar heating system (SHS) and earth-tube heat exchanger (ETHE) during the winter season of 2020 (January to March). The experimental work was executed in the experimental farm of Faculty of Agriculture, Suez Canal University, Ismailia Governorate, Egypt (30.62ºN). Three identical gable-even-span polyethylene greenhouses each have a net floor surface area of 24 m2. The first greenhouse (G1) was equipped with complete solar water heating. The second greenhouse (G2) was equipped with an earth-tube heat exchanger. While the third greenhouse (G3) was used as a control unit. The obtained data showed that the overall thermal efficiency of the earth-tube heat exchanger was 65%. The average overall thermal efficiency for solar water collectorswas 59.6%. The average nightly indoor air temperatures for the three greenhouses (G1, G2, and G3) were 13.2, 11.6, and 9.3ºC, respectively. The total fresh yield of cucumber crop for the three greenhouses (G1, G2, and G3), respectively, 7.5, 6.3, and 3.8 kg/m2.

DOI

10.21608/mjae.2022.118501.1063

Keywords

Greenhouses, Earth-tube heat exchanger, Solar water heating, solar tracking

Authors

First Name

Sameh S.

Last Name

Kishk

MiddleName

-

Affiliation

Assoc. Prof., Ag. Eng. Dept., Fac. of Ag., Suez Canal U., 41522 Ismailia, Egypt.

Email

s.kishk2011@yahoo.com

City

-

Orcid

-

First Name

Islam H.

Last Name

El-Sheikh

MiddleName

-

Affiliation

Prof., Ag. Eng. Dept., Fac. of Ag., Suez Canal U., 41522 Ismailia, Egypt.

Email

-

City

-

Orcid

-

First Name

Yahya

Last Name

Ejeez

MiddleName

-

Affiliation

Demon., Ag. Eng. Dept., Fac. of Ag., Suez Canal U. 41522 Ismailia, Egypt.

Email

-

City

-

Orcid

-

Volume

39

Article Issue

2

Related Issue

32679

Issue Date

2022-04-01

Receive Date

2022-01-26

Publish Date

2022-04-01

Page Start

281

Page End

298

Print ISSN

1687-384X

Online ISSN

2636-3062

Article File

MJAE_Volume 39_Issue 2_Pages 281-298.pdf

PDF . 961.8kB

Link

https://mjae.journals.ekb.eg/article_222190.html

Detail API

https://mjae.journals.ekb.eg/service?article_code=222190

Order

7

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

REDUCING THE THERMAL DEVIATION INSIDE GREENHOUSES BY USING SOLAR HEATING AND EARTH TUBE HEAT EXCHANGER SYSTEMS

Details

Type

Article

Created At

23 Jan 2023