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145031

Simultaneous Condensation-Evaporation Heat Transfer on a Vertical Tube, I- Experimental Study.

Article

Last updated: 22 Jan 2023

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Tags

Mechanical Power Engineering

Abstract

In the present work, simultaneous condensation-evaporation heat transfer in thin films on a vertical tube is, experimentally, investigated. Condensation takes place on the outer surface of the vertical tube and the evaporation occurs inside it. The condensed steam outside the tested tube imparts its later heat to evaporate the thin liquid film, which flows inside the tube. Throughout this work, the range of Reynolds number for water film flow is from 50 to 800, while that of condensate outside the tube, takes values less than 100. 
The studied operating parameters, which affect the condensation-evaporation processes are water flow rate, its degree of subcool, the flow rate of the dry saturated heating steam and its pressure. The flow rate of the falling heated water is 3-50 kg/hr at constant pressure of 1.1 bar, while the heating steam flow rate is up to 5 kg/hr at a pressure which varies from 1.2 to 2 bar. 
The results show that, decreasing the Reynolds number of the falling water film, up to dry out a the end of the vertical tube, causes an increase of heat transfer coefficient for different operating parameters. In addition, the Nusselt number for different values of Reynolds number are calculated and in accordance, an empirical correlation for the condensation - evaporation Nusselt number as a function of the studied operating parameters is proposed.

DOI

10.21608/bfemu.2021.145031

Authors

First Name

Mohamed

Last Name

Wasel

MiddleName

Gamal Hassan

Affiliation

Mechanical Power Engineering Department., Faculty of Engineering., El-Mansoura University., Mansoura., Egypt.

Email

-

City

Mansoura

Orcid

-

First Name

Hesham

Last Name

Mostafa

MiddleName

M.

Affiliation

Higher Technological Institute., Tenth of Ramadan City., Egypt.

Email

dr.heshammostafa@yahoo.com

City

Tenth of Ramadan

Orcid

-

First Name

M.

Last Name

Mousa

MiddleName

G.

Affiliation

Faculty of Education Industrial Branch., Damietta., Mansoura Univ., Mansours., Egypt.

Email

mgmousa@hotmail.com

City

Mansoura

Orcid

-

Volume

26

Article Issue

2

Related Issue

21250

Issue Date

2001-06-01

Receive Date

2001-04-11

Publish Date

2021-01-31

Page Start

92

Page End

101

Print ISSN

1110-0923

Online ISSN

2735-4202

Article File

BFEMU_Volume 26_Issue 2_Pages 92-101.pdf

PDF . 121.3kB

Link

https://bfemu.journals.ekb.eg/article_145031.html

Detail API

https://bfemu.journals.ekb.eg/service?article_code=145031

Order

18

Type

Research Studies

Type Code

1,205

Publication Type

Journal

Publication Title

MEJ. Mansoura Engineering Journal

Publication Link

https://bfemu.journals.ekb.eg/

MainTitle

-

Details

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Article

Created At

22 Jan 2023