Wall shape optimization for a thermosyphon loop featuring corrugated pipes

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Abstract

In the present paper we address the problem of optimal wall-shape design of a single phase laminar thermosyphon loop. The model takes the buoyancy forces into account via the Boussinesq approximation. We focus our study on showing the effects of wall shape on the flow and on the temperature inside the thermosyphon. To this extend we determine the dependency of the flow rate and the increase in temperature, on the geometrical characteristics of the loop. The geometry considered is a set of axially symmetric corrugated pipes described by a set of parameters; namely the pipe inner radius, the period of the corrugation, the amplitude of the corrugation, and the ratio of expansion and contraction regions of a period of the pipe. The governing equations are solved using the Finite Element Method, in combination with an adaptive mesh refinement technique in order to capture the effects of wall shape. We characterize the effects of the amplitude and of the ratio of expansion and contraction. In particular we show that for a given fixed amplitude it is possible to find an optimal ratio of expansion and contraction that minimizes the temperature inside the thermosyphon. The results show that by adequately choosing the design parameters, the performance of the thermosyphon loop can be improved.
Original languageEnglish
Title of host publicationProceedings of the 2011 Cryogenic Engineering Conference & International Cryogenic Materials Conference (CEC-ICMC 2011, Spokane WA, USA, June 13-17, 2011)
EditorsJ.G. Weisend II
Pages724-731
DOIs
Publication statusPublished - 2012

Publication series

NameAIP Conference Proceedings
Volume1434
ISSN (Print)0094-243X

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    Rosen Esquivel, P. I., Thije Boonkkamp, ten, J. H. M., Dam, J. A. M., & Mattheij, R. M. M. (2012). Wall shape optimization for a thermosyphon loop featuring corrugated pipes. In J. G. Weisend II (Ed.), Proceedings of the 2011 Cryogenic Engineering Conference & International Cryogenic Materials Conference (CEC-ICMC 2011, Spokane WA, USA, June 13-17, 2011) (pp. 724-731). (AIP Conference Proceedings; Vol. 1434). https://doi.org/10.1063/1.4706984