Change search
ReferencesLink to record
Permanent link

Direct link
Instability, heat transfer and flow regime in a two-phase flow thermosyphon loop at different diameter evaporator channel
KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration.
KTH, School of Industrial Engineering and Management (ITM), Energy Technology.
2010 (English)In: Applied Thermal Engineering, ISSN 1359-4311, E-ISSN 1873-5606, Vol. 30, no 10, 1107-1114 p.Article in journal (Refereed) Published
Abstract [en]

In this study, the influence of different channel geometries on heat transfer, flow regime and instability of a two-phase thermosyphon loop, is investigated. Instabilities in flow regime and heat transfer, at low and high heat fluxes, are observed. Bubbly flow with nucleate boiling heat transfer mechanism, confined bubbly/slug flow with backflow for small channel height (H) and finally slug/churn flow at high heat fluxes are observed. This study shows that flow and thermal instability increases as channel height (H) decreases and also heat transfer coefficient increases with increasing channel height and heat flux. Bubbly flow characterizes the flow regime at high heat transfer coefficients while confined bubbles, backflow and intermittent boiling are more significant for low channel heights with lower heat transfer coefficient and critical heat flux. (C) 2010 Elsevier Ltd. All rights reserved.

Place, publisher, year, edition, pages
2010. Vol. 30, no 10, 1107-1114 p.
Keyword [en]
Heat transfer, Flow regime, Instability, Two-phase thermosyphon loop, Electronic cooling, Natural circulation
National Category
Mechanical Engineering
URN: urn:nbn:se:kth:diva-27864DOI: 10.1016/j.applthermaleng.2010.01.024ISI: 000277856600004ScopusID: 2-s2.0-77950596370OAI: diva2:385831
QC 20110112Available from: 2011-01-12 Created: 2011-01-03 Last updated: 2011-01-12Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full textScopus

Search in DiVA

By author/editor
Khodabandeh, RahmatollahFurberg, Richard
By organisation
Applied Thermodynamics and RefrigerationEnergy Technology
In the same journal
Applied Thermal Engineering
Mechanical Engineering

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 73 hits
ReferencesLink to record
Permanent link

Direct link