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142617

Study of Near Field Performance of Multi-ports Diffuser in Relatively Deep Rivers.

Article

Last updated: 04 Jan 2025

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Subjects

-

Tags

Irrigation and Hydraulic Engineering

Abstract

In this paper an experimental study is presented for the problem of the thermal power stations, which is discharging the hot water into relatively deep rivers. The receiving water of the river is said to be deep when the jet is free to mix due to entrainment and buoyancy and is not constrained by neither the river bed nor the water surface (6), which increases the temperature dilution. The water depth (H) is constant during the experiments. The main objective of this paper is to develop a new general equation which can be used in designing the multi-ports diffuser of the thermal power plant discharging hot water into relatively deep rivers. Also, the rapid dilution and minimizing of the mixing zone length of the hot water 10 reduce the environmental effects are considered. In this paper, the effects of the different parameters related to both the out-fall structure and the river characteristics on the rapid dilution of the hot water concentration (Cm/Co) are considered. These parameters are, the effluent/ambient velocity ratio (V/U), the number of ports (n), the spacing between the ports with respect to its diameter (s/D). the vertical angle of ports in combination with the ratio of its height to the flow depth (θh/H), and the horizontal angle between the diffuser line and the flow direction (β). The analysis of the experimental results shows that the relative thermal concentration ( 
Cm/Co ) is directly proportional to V/U, n, θh/Hand β. while it is inversely proportional to SD. Also, it is found that the maximum value of Cm/Co occurs when the diffuser is aligned parallel to the direction of flow. A general equation between the relative thermal concentration (Cm/Co) and the aforementioned parameters is developed. The comparative study between the experimental results, which is carried out by Mowed [7], and the corresponding results by applying the developed equation, illustrates that there is a good compatibility between the two results.

DOI

10.21608/bfemu.2021.142617

Authors

First Name

Kasem Salah

Last Name

El-Alfy

MiddleName

Abd El-Wahab

Affiliation

Irrigation & Hydraulics Department., Faculty of Engineering., El-Mansoura University., Egypt.

Email

-

City

Mansoura

Orcid

-

First Name

M.

Last Name

Sobeih

MiddleName

F.

Affiliation

Associate Professor., Civil Engineering Department., Faculty of Engineering., Minufiya University., Egypt.

Email

-

City

-

Orcid

-

First Name

A.

Last Name

Khattab

MiddleName

F.

Affiliation

Professor., Chan, Maintiance Res, Inst., National Research Centre., Egypt.

Email

-

City

-

Orcid

-

First Name

M.

Last Name

Saad

MiddleName

B.

Affiliation

Professor., Director of Hydr. Res. Inst.(HRI), National Water Research Centre, Egypt.

Email

-

City

-

Orcid

-

First Name

Y.

Last Name

Shawky

MiddleName

M.

Affiliation

Ph.D, Researcher, Hydr. Research. Institute (HRI). Egypt.

Email

-

City

-

Orcid

-

Volume

27

Article Issue

2

Related Issue

21024

Issue Date

2002-06-01

Receive Date

2002-03-11

Publish Date

2021-06-01

Page Start

1

Page End

13

Print ISSN

1110-0923

Online ISSN

2735-4202

Article File

BFEMU_Volume 27_Issue 2_Pages 1-13.pdf

PDF . 420.6kB

Link

https://bfemu.journals.ekb.eg/article_142617.html

Detail API

https://bfemu.journals.ekb.eg/service?article_code=142617

Order

6

Type

Research Studies

Type Code

1,205

Publication Type

Journal

Publication Title

MEJ. Mansoura Engineering Journal

Publication Link

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

MainTitle

Study of Near Field Performance of Multi-ports Diffuser in Relatively Deep Rivers.

Details

Type

Article

Created At

22 Jan 2023