THERMAL SCIENCE

International Scientific Journal

Kamal A. R. Ismail

,

Fátima A. M. Lino

,

Louryval C. Paixão

,

Raquel C. R. Da Silva

,

Carlos T. Salinas

ENHANCEMENT OF PHASE CHANGE ALONG THE LONG TUBES OF A LATENT HEAT STORAGE UNIT

ABSTRACT
This paper presents the results of an experimental study on the solidification along a long horizontal tube submersed in liquid PCM and the enhancements due to the use of a turbulence promoter. The experimental rig consists of a long copper tube fixed coaxially inside a larger PVC tube filled with liquid PCM (water). The working fluid at a temperature lower than the PCM phase change temperature flows inside the copper tube provoking the solidification of PCM over its surface. The PVC tube is fitted with three windows along its length for observation and photographing the solidified PCM interface. The tests were realized for values of Reynolds number from 741 to 2280 and temperatures varying from -5 to - 20ºC with and without turbulence promoter showed their effects on the interface position, the solidification velocity and how they were enhanced because of the turbulence promoter.
KEYWORDS
solidification enhancement, phase change, energy storage, turbulence promoter, PCM, thickness distribution
PAPER SUBMITTED: 2012-11-07
PAPER REVISED: 2013-04-22
PAPER ACCEPTED: 2013-05-16
PUBLISHED ONLINE: 2013-06-01
DOI REFERENCE: https://doi.org/10.2298/TSCI121107059I
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2014, VOLUME 18, ISSUE Issue 4, PAGES [1285 - 1292]
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Enhancement of phase change along the long tubes of a latent heat storage unit

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence