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Journal of Engineering
Volume 2014, Article ID 641954, 11 pages
Research Article

Experimental Investigation of Phase Change inside a Finned-Tube Heat Exchanger

1School of Mechanical Engineering, Babol University of Technology, P.O. Box 484, Babol 4714871167, Iran
2Department of Mechanical Engineering, Golestan University, P.O. Box 155, Gorgan 4913815739, Iran

Received 26 May 2014; Revised 13 September 2014; Accepted 14 September 2014; Published 8 October 2014

Academic Editor: Shuisheng He

Copyright © 2014 M. Rahimi et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


An experimental study is conducted in order to investigate melting and solidification processes of paraffin RT35 as phase change materials in a finned-tube. Therefore the effect of using fins in this study as well as some operational parameters is considered. The motivation of this study is to design and construct a novel storage unit and to compare it with a finless heat exchanger. A series of experiments are conducted to investigate the effect of increasing the inlet temperature and flow rate on the charging and discharging processes of the phase change material. It is shown that, using fins in phase change process enhances melting and solidification procedures. The trend of this variation is different for the heat exchangers; increasing the inlet temperature for the bare tube heat exchanger more effectively lowers melting time. Similarly, flow rate variation varies the solidification time more intensely for the bare tube heat exchanger.