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371573

ACTIVE COOLING HEAT TRANSFER COEFFICIENT ENHANCEMENTS IN POROUS COMPACT HEAT EXCHANGER

Article

Last updated: 03 Jan 2025

Subjects

-

Tags

Mechanical engineering

Abstract

Due to the poor thermal properties of the air and the resistance of the boundary layer, enhancing the heat transfer coefficient HTC is a challenging problem. In this study, the hydro-thermal characteristics of V-shape copper porous media attached to a vertical heat source were studied by using the active cooling forced convection technique. The performance of hydraulic is expressed by pressure drop through the porous insert material while the thermal performance is expressed by the overall HTC and Nusselt number. To conduct this research the finite element method (FEM) is used by employing the COMSOL software. The V-shape geometry was chosen as the porous thickness is 2 mm and the porous height is 4 mm. The V-shape angle was changed from 14 to 180, and the airflow velocity was varied from 0.7 m/s to 3 m/s. The results show that angle 14 gives the minimum pressure drop so minimum pumping power. For laminar airflow changing air velocity from 0.7 to 3 m/s led to a change in the pressure drop from 44 to 530 Pa and the Nusselt number ranges from 186-1592. V-shape with an angle of 14 degrees gives the best hydraulic performance for the selected geometry and The best performance criteria is at porosity 25% and Reynolds number 4617. The best enhancement of the heat transfer coefficient from this geometry is 8 times more than that from the bare model. Correlations for Nusselt number and performance criteria were concluded.
 
Special Issue of AEIC 2024 (Mechanical & Chemical and Material Engineering  Session)

DOI

10.21608/auej.2024.249276.1476

Keywords

Active cooling, Porous materials, heat exchanger, Effectiveness, Heat transfer coefficient. Forced convection

Authors

First Name

Ramy

Last Name

Farid Marzouk Elsayed

MiddleName

-

Affiliation

Mechanical Department, Faculty of Engineering, Al-Azhar University, Cairo, Egypt

Email

ramyfareed.18@azhar.edu.eg

City

-

Orcid

-

First Name

Said

Last Name

Mohamed Ali

MiddleName

-

Affiliation

Mechanical Department, Faculty of Engineering, Al-Azhar University, Cairo, Egypt

Email

prof.dr.said@hotmail.com

City

Cairo

Orcid

-

First Name

Walid

Last Name

Aboelsoud

MiddleName

-

Affiliation

Mechanical Power Engineering Department, Faculty of Engineering, Ain Shams University, Cairo, Egypt

Email

walid.aboelsoud@eng.asu.edu.eg

City

Cairo

Orcid

-

Volume

19

Article Issue

72

Related Issue

49551

Issue Date

2024-07-01

Receive Date

2023-11-16

Publish Date

2024-07-01

Page Start

75

Page End

91

Print ISSN

1687-8418

Online ISSN

3009-7622

Link

https://jaes.journals.ekb.eg/article_371573.html

Detail API

https://jaes.journals.ekb.eg/service?article_code=371573

Order

371,573

Type

Original Article

Type Code

706

Publication Type

Journal

Publication Title

Journal of Al-Azhar University Engineering Sector

Publication Link

https://jaes.journals.ekb.eg/

MainTitle

ACTIVE COOLING HEAT TRANSFER COEFFICIENT ENHANCEMENTS IN POROUS COMPACT HEAT EXCHANGER

Details

Type

Article

Created At

24 Dec 2024