Numerical analysis of the effect of filling ratio on the transient behaviour of a two-phase closed thermosyphon

Davoud Jafari; Sauro Filippeschi; Alessandro Franco; Paolo Di Marco

Numerical analysis of the effect of filling ratio on the transient behaviour of a two-phase closed thermosyphon

Davoud Jafari^*
, Sauro Filippeschi
, Alessandro Franco
, Paolo Di Marco

^*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

1 Citation (Scopus)

Abstract

The use of the two-phase closed thermosyphons (TPCTs) is increasing for many heat transfer applications. In this study, the development of a numerical model is presented with the purpose of determining the transient characteristics of a TPCT. The model includes the heat transfer through the wall, vapour core, liquid pool and the falling condensate film. The complete two-dimensional conservation equations for mass, momentum, and energy are solved using finite volume scheme for the vapour flow and pipe wall. The liquid film is modelled using a one dimensional quasi-steady Nusselt type solution. The model is validated by comparison with existing experimental data. The effect of filling ratio (volume of working fluid to evaporator section) for a copper thermosyphon has been investigated. Water is used as a working fluid for different filling ratio from 20 to 100%. The investigations are aimed to determine working thermal performance of a TPCT at different filling ratio for solar energy applications.

Original language	English
Title of host publication	Proceedings of the World Congress on Mechanical, Chemical, and Material Engineering, MCM 2015
Editors	Jamal Chaouki, Yuyuan Zhao
Publisher	Avestia Publishing
Number of pages	9
ISBN (Print)	9781927877173
Publication status	Published - 2015
Externally published	Yes
Event	World Congress on Mechanical, Chemical, and Material Engineering, MCM 2015 - Barcelona, Spain Duration: 20 Jul 2015 → 21 Jul 2015 https://2015.mcmcongress.com/

Publication series

Name	Proceedings of the World Congress on Mechanical, Chemical, and Material Engineering (MCM)
Publisher	Avestia
Volume	2015
ISSN (Electronic)	2369-8136

Conference

Conference	World Congress on Mechanical, Chemical, and Material Engineering, MCM 2015
Abbreviated title	MCM 2015
Country/Territory	Spain
City	Barcelona
Period	20/07/15 → 21/07/15
Internet address	https://2015.mcmcongress.com/

Keywords

Filling ratio
Numerical simulation
Two phase closed thermosyphon

UN SDGs

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

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https://avestia.com/MCM2015_Proceedings/files/papers/HTFF302.pdf

Cite this

Jafari, D., Filippeschi, S., Franco, A., & Di Marco, P. (2015). Numerical analysis of the effect of filling ratio on the transient behaviour of a two-phase closed thermosyphon. In J. Chaouki, & Y. Zhao (Eds.), Proceedings of the World Congress on Mechanical, Chemical, and Material Engineering, MCM 2015 Article 302 (Proceedings of the World Congress on Mechanical, Chemical, and Material Engineering (MCM); Vol. 2015). Avestia Publishing. https://avestia.com/MCM2015_Proceedings/files/papers/HTFF302.pdf

Jafari, Davoud ; Filippeschi, Sauro ; Franco, Alessandro et al. / Numerical analysis of the effect of filling ratio on the transient behaviour of a two-phase closed thermosyphon. Proceedings of the World Congress on Mechanical, Chemical, and Material Engineering, MCM 2015. editor / Jamal Chaouki ; Yuyuan Zhao. Avestia Publishing, 2015. (Proceedings of the World Congress on Mechanical, Chemical, and Material Engineering (MCM)).

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title = "Numerical analysis of the effect of filling ratio on the transient behaviour of a two-phase closed thermosyphon",

abstract = "The use of the two-phase closed thermosyphons (TPCTs) is increasing for many heat transfer applications. In this study, the development of a numerical model is presented with the purpose of determining the transient characteristics of a TPCT. The model includes the heat transfer through the wall, vapour core, liquid pool and the falling condensate film. The complete two-dimensional conservation equations for mass, momentum, and energy are solved using finite volume scheme for the vapour flow and pipe wall. The liquid film is modelled using a one dimensional quasi-steady Nusselt type solution. The model is validated by comparison with existing experimental data. The effect of filling ratio (volume of working fluid to evaporator section) for a copper thermosyphon has been investigated. Water is used as a working fluid for different filling ratio from 20 to 100\%. The investigations are aimed to determine working thermal performance of a TPCT at different filling ratio for solar energy applications.",

keywords = "Filling ratio, Numerical simulation, Two phase closed thermosyphon",

author = "Davoud Jafari and Sauro Filippeschi and Alessandro Franco and \{Di Marco\}, Paolo",

note = "Publisher Copyright: {\textcopyright} 2015, Avestia Publishing. All rights reserved.; World Congress on Mechanical, Chemical, and Material Engineering, MCM 2015, MCM 2015 ; Conference date: 20-07-2015 Through 21-07-2015",

year = "2015",

language = "English",

isbn = "9781927877173",

series = "Proceedings of the World Congress on Mechanical, Chemical, and Material Engineering (MCM)",

publisher = "Avestia Publishing",

editor = "Jamal Chaouki and Yuyuan Zhao",

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}

Jafari, D, Filippeschi, S, Franco, A & Di Marco, P 2015, Numerical analysis of the effect of filling ratio on the transient behaviour of a two-phase closed thermosyphon. in J Chaouki & Y Zhao (eds), Proceedings of the World Congress on Mechanical, Chemical, and Material Engineering, MCM 2015., 302, Proceedings of the World Congress on Mechanical, Chemical, and Material Engineering (MCM), vol. 2015, Avestia Publishing, World Congress on Mechanical, Chemical, and Material Engineering, MCM 2015, Barcelona, Spain, 20/07/15. <https://avestia.com/MCM2015_Proceedings/files/papers/HTFF302.pdf>

Numerical analysis of the effect of filling ratio on the transient behaviour of a two-phase closed thermosyphon. / Jafari, Davoud; Filippeschi, Sauro; Franco, Alessandro et al.
Proceedings of the World Congress on Mechanical, Chemical, and Material Engineering, MCM 2015. ed. / Jamal Chaouki; Yuyuan Zhao. Avestia Publishing, 2015. 302 (Proceedings of the World Congress on Mechanical, Chemical, and Material Engineering (MCM); Vol. 2015).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

TY - GEN

T1 - Numerical analysis of the effect of filling ratio on the transient behaviour of a two-phase closed thermosyphon

AU - Jafari, Davoud

AU - Filippeschi, Sauro

AU - Franco, Alessandro

AU - Di Marco, Paolo

PY - 2015

Y1 - 2015

N2 - The use of the two-phase closed thermosyphons (TPCTs) is increasing for many heat transfer applications. In this study, the development of a numerical model is presented with the purpose of determining the transient characteristics of a TPCT. The model includes the heat transfer through the wall, vapour core, liquid pool and the falling condensate film. The complete two-dimensional conservation equations for mass, momentum, and energy are solved using finite volume scheme for the vapour flow and pipe wall. The liquid film is modelled using a one dimensional quasi-steady Nusselt type solution. The model is validated by comparison with existing experimental data. The effect of filling ratio (volume of working fluid to evaporator section) for a copper thermosyphon has been investigated. Water is used as a working fluid for different filling ratio from 20 to 100%. The investigations are aimed to determine working thermal performance of a TPCT at different filling ratio for solar energy applications.

AB - The use of the two-phase closed thermosyphons (TPCTs) is increasing for many heat transfer applications. In this study, the development of a numerical model is presented with the purpose of determining the transient characteristics of a TPCT. The model includes the heat transfer through the wall, vapour core, liquid pool and the falling condensate film. The complete two-dimensional conservation equations for mass, momentum, and energy are solved using finite volume scheme for the vapour flow and pipe wall. The liquid film is modelled using a one dimensional quasi-steady Nusselt type solution. The model is validated by comparison with existing experimental data. The effect of filling ratio (volume of working fluid to evaporator section) for a copper thermosyphon has been investigated. Water is used as a working fluid for different filling ratio from 20 to 100%. The investigations are aimed to determine working thermal performance of a TPCT at different filling ratio for solar energy applications.

KW - Filling ratio

KW - Numerical simulation

KW - Two phase closed thermosyphon

UR - https://www.scopus.com/pages/publications/85146644546

M3 - Conference contribution

AN - SCOPUS:85045013981

SN - 9781927877173

T3 - Proceedings of the World Congress on Mechanical, Chemical, and Material Engineering (MCM)

BT - Proceedings of the World Congress on Mechanical, Chemical, and Material Engineering, MCM 2015

A2 - Chaouki, Jamal

A2 - Zhao, Yuyuan

PB - Avestia Publishing

T2 - World Congress on Mechanical, Chemical, and Material Engineering, MCM 2015

Y2 - 20 July 2015 through 21 July 2015

ER -

Jafari D, Filippeschi S, Franco A, Di Marco P. Numerical analysis of the effect of filling ratio on the transient behaviour of a two-phase closed thermosyphon. In Chaouki J, Zhao Y, editors, Proceedings of the World Congress on Mechanical, Chemical, and Material Engineering, MCM 2015. Avestia Publishing. 2015. 302. (Proceedings of the World Congress on Mechanical, Chemical, and Material Engineering (MCM)).

Numerical analysis of the effect of filling ratio on the transient behaviour of a two-phase closed thermosyphon

Abstract

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Keywords

UN SDGs

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