Enhancement of convection heat-transfer in a rectangular duct

Yasar Demirel; Habib H. Al-Ali; Basem A. Abu-Al-Saud

doi:10.1016/S0306-2619(99)00110-5

Enhancement of convection heat-transfer in a rectangular duct

Yasar Demirel
, Habib H. Al-Ali^*
, Basem A. Abu-Al-Saud

^*Corresponding author for this work

Research output: Contribution to journal › Conference article › peer-review

16 Scopus citations

Abstract

Characteristics of wall-to-air heat transfer for a fully developed forced convection have been studied in a large rectangular packed duct with 160 cm heated length, 40 cm width, and for low bed equivalent diameter to particle diameter ratio. The separation distance between the top and bottom walls is 10 cm. A uniform heat flux is supplied at the top wall, while the bottom wall is insulated. Raschig rings in two and spherical packing in three sizes have been used in the air flow passage to investigate the enhancement of heat transfer due to packing. Temperature profiles for the steady and unsteady states have been measured. In modeling, the Ergun equation and energy equations are solved to calculate the temperature profile for the steady-state only. It has been found that the introduction of the packing into the air flow passage increases the wall-to-fluid heat transfer approximately three times compared with that of empty bed. This finding can enhance the rational use of energy from solar air heaters, chemical reactors, electronic cooling and many other engineering applications.

Original language	English
Pages (from-to)	441-451
Number of pages	11
Journal	Applied Energy
Volume	64
Issue number	1-4
DOIs	https://doi.org/10.1016/S0306-2619(99)00110-5
State	Published - 1 Sep 1999

Bibliographical note

Funding Information:
The authors wish to acknowledge King Fahd University of Petroleum & Minerals for funding this research project No. CHE/HEATFLUX/173.

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Keywords

Asymmetric heating
Enhancement of convection
Rectangular packed bed
Transient convection

ASJC Scopus subject areas

Renewable Energy, Sustainability and the Environment
Building and Construction
General Energy
Mechanical Engineering
Management, Monitoring, Policy and Law

Access to Document

10.1016/S0306-2619(99)00110-5

Cite this

@article{d3eb80d679574495a994304022eeb385,

title = "Enhancement of convection heat-transfer in a rectangular duct",

abstract = "Characteristics of wall-to-air heat transfer for a fully developed forced convection have been studied in a large rectangular packed duct with 160 cm heated length, 40 cm width, and for low bed equivalent diameter to particle diameter ratio. The separation distance between the top and bottom walls is 10 cm. A uniform heat flux is supplied at the top wall, while the bottom wall is insulated. Raschig rings in two and spherical packing in three sizes have been used in the air flow passage to investigate the enhancement of heat transfer due to packing. Temperature profiles for the steady and unsteady states have been measured. In modeling, the Ergun equation and energy equations are solved to calculate the temperature profile for the steady-state only. It has been found that the introduction of the packing into the air flow passage increases the wall-to-fluid heat transfer approximately three times compared with that of empty bed. This finding can enhance the rational use of energy from solar air heaters, chemical reactors, electronic cooling and many other engineering applications.",

keywords = "Asymmetric heating, Enhancement of convection, Rectangular packed bed, Transient convection",

author = "Yasar Demirel and Al-Ali, \{Habib H.\} and Abu-Al-Saud, \{Basem A.\}",

note = "Funding Information: The authors wish to acknowledge King Fahd University of Petroleum \& Minerals for funding this research project No. CHE/HEATFLUX/173.",

year = "1999",

month = sep,

day = "1",

doi = "10.1016/S0306-2619(99)00110-5",

language = "English",

volume = "64",

pages = "441--451",

journal = "Applied Energy",

issn = "0306-2619",

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number = "1-4",

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T1 - Enhancement of convection heat-transfer in a rectangular duct

AU - Demirel, Yasar

AU - Al-Ali, Habib H.

AU - Abu-Al-Saud, Basem A.

N1 - Funding Information: The authors wish to acknowledge King Fahd University of Petroleum & Minerals for funding this research project No. CHE/HEATFLUX/173.

PY - 1999/9/1

Y1 - 1999/9/1

N2 - Characteristics of wall-to-air heat transfer for a fully developed forced convection have been studied in a large rectangular packed duct with 160 cm heated length, 40 cm width, and for low bed equivalent diameter to particle diameter ratio. The separation distance between the top and bottom walls is 10 cm. A uniform heat flux is supplied at the top wall, while the bottom wall is insulated. Raschig rings in two and spherical packing in three sizes have been used in the air flow passage to investigate the enhancement of heat transfer due to packing. Temperature profiles for the steady and unsteady states have been measured. In modeling, the Ergun equation and energy equations are solved to calculate the temperature profile for the steady-state only. It has been found that the introduction of the packing into the air flow passage increases the wall-to-fluid heat transfer approximately three times compared with that of empty bed. This finding can enhance the rational use of energy from solar air heaters, chemical reactors, electronic cooling and many other engineering applications.

AB - Characteristics of wall-to-air heat transfer for a fully developed forced convection have been studied in a large rectangular packed duct with 160 cm heated length, 40 cm width, and for low bed equivalent diameter to particle diameter ratio. The separation distance between the top and bottom walls is 10 cm. A uniform heat flux is supplied at the top wall, while the bottom wall is insulated. Raschig rings in two and spherical packing in three sizes have been used in the air flow passage to investigate the enhancement of heat transfer due to packing. Temperature profiles for the steady and unsteady states have been measured. In modeling, the Ergun equation and energy equations are solved to calculate the temperature profile for the steady-state only. It has been found that the introduction of the packing into the air flow passage increases the wall-to-fluid heat transfer approximately three times compared with that of empty bed. This finding can enhance the rational use of energy from solar air heaters, chemical reactors, electronic cooling and many other engineering applications.

KW - Asymmetric heating

KW - Enhancement of convection

KW - Rectangular packed bed

KW - Transient convection

UR - https://www.scopus.com/pages/publications/0033375866

U2 - 10.1016/S0306-2619(99)00110-5

DO - 10.1016/S0306-2619(99)00110-5

M3 - Conference article

AN - SCOPUS:0033375866

SN - 0306-2619

VL - 64

SP - 441

EP - 451

JO - Applied Energy

JF - Applied Energy

IS - 1-4

ER -

Enhancement of convection heat-transfer in a rectangular duct

Abstract

Bibliographical note

UN SDGs

Keywords

ASJC Scopus subject areas

Access to Document

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Cite this