Thermal Science 2014 Volume 18, Issue 4, Pages: 1285-1292
https://doi.org/10.2298/TSCI121107059I
Full text ( 259 KB)
Cited by
Enhancement of phase change along the long tubes of a latent heat storage unit
Ismail Kamal A.R. (Department of Thermal and Fluids Engineering, Faculty of Mechanical Engineering, State University of Campinas, UNICAMP, Campinas, Brazil)
Lino Fátima A.M. (Department of Thermal and Fluids Engineering, Faculty of Mechanical Engineering, State University of Campinas, UNICAMP, Campinas, Brazil)
Paixão Louryval C. (Department of Thermal and Fluids Engineering, Faculty of Mechanical Engineering, State University of Campinas, UNICAMP, Campinas, Brazil)
da Silva Raquel C.R. (Department of Thermal and Fluids Engineering, Faculty of Mechanical Engineering, State University of Campinas, UNICAMP, Campinas, Brazil)
Salinas Carlos T. (Department of Thermal and Fluids Engineering, Faculty of Mechanical Engineering, State University of Campinas, UNICAMP, Campinas, Brazil)
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