International Scientific Journal

Thermal Science - Online First

External Links

online first only

Experimental study of solidification of paraffin wax in solar based triple concentric tube thermal energy storage system

This paper addresses an experimental investigation of a Solar based Thermal Energy Storage system to meet current energy demand especially for milk industry in Tamilnadu, India. A solar based energy storage system has been designed to study the heat transfer characteristics of paraffin wax where it is filled in the middle tube, with cold heat transfer fluid flowing outer tube, inner tube, and both tubes at a time during solidification process in a horizontal triple concentric heat exchanger. In this study, main concentrations are temperature distributions in the energy storage materials such as paraffin wax during solidification process and total solidification time. And three heat recovery methods were used to solidify paraffin wax from the inside tube, outside tube and both tubes methods to improve the heat transfer between heat transfer fluid and phase change materials(PCM). The experiment has been performed for different heat transfer fluid mass flow rates and different inlet temperatures and predicted results shows that solidification time is reduced.
PAPER REVISED: 2017-02-07
PAPER ACCEPTED: 2017-02-14
  1. Birol Basal.,AhemetUnal.,Numerical evolution of a triple latent heat thermal energy storage, solar energy,vol. 92 (2013), pp.196-205
  2. AbduljalilAAlAbidi.,et al.,Experimental study of PCM melting in triplex tube thermal energy storage for liquid desiccant air conditioning , Energy and buildings,vol.60 (2013),pp.270-279
  3. AbduljalilAAlAbidi.,et al.,Experimental study of melting and solidification of PCM in a triplex tube heat exchanger with fins, Energy and buildings vol.68 (2014),pp.33-41
  4. AbduljalilAAlAbidi.,et al.,Internal and external fin heat transfer enhancement technique for latent heat thermal energy storage in triplex tube heat exchangers', Applied Thermal Engineering vol.53 (2013),pp.147-156
  5. Sohif.,et al.,Enhance heat transfer for PCM melting in triplex tube with internal-external fins, Energy conversion and Management Vol.74 (2013),pp.223-236
  6. Mettawee E-BS., Assassa GMR.,Experimental study of a compact PCM Solar Collector, Energy ;31 (2006),2958-68
  7. al. Cooking during off sunshine hours using PCMs as storage media, Fuel Energy Abstract ;36(5),(1995),348
  8. Farid M.M., Kanzawa A.,Thermal performance of a heat storage module using PCM's with different melting temperatures; Mathematical modeling, Journal of Solar Energy Engineering, Vol. 111 (19889), pp.152-157
  9. Farid M.M.,et al.,Thermal performance of a heat storage module using PCM'S with different melting temperatures:Experimental, Journal of Solar Energy Engineering, Vol. 112 (1990) pp. 125-131
  10. Wantanabe T., et al.,Enhancement of charging and discharging rates in a latent heat storage system by use of PCM with different melting temperatures, Heat Recovery Systems and CHP, Vol. 13, No. 3 (1963) pp. 57-66
  11. Patankar, S.,Numerical Heat Transfer and Fluid Flow, McGraw-Hill Book Company, New York,USA,1980