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Experimental Study on Thermal Storage Performance of Cylindrically Encapsulated PCM in a Cylindrical Storage Tank With Axial Flow

[+] Author Affiliations
Chatura Wickramaratne, Francesca Moloney, Rajeev Kamal, D. Y. Goswami, Elias Stefanakos

University of South Florida, Tampa, FL

Tolga Pirasaci

Gazi University, Ankara, Turkey

Jaspreet Dhau

Florida Polytechnic University, Lakeland, FL

Paper No. POWER2016-59427, pp. V001T08A014; 8 pages
  • ASME 2016 Power Conference collocated with the ASME 2016 10th International Conference on Energy Sustainability and the ASME 2016 14th International Conference on Fuel Cell Science, Engineering and Technology
  • ASME 2016 Power Conference
  • Charlotte, North Carolina, USA, June 26–30, 2016
  • Conference Sponsors: Power Division, Advanced Energy Systems Division, Solar Energy Division, Nuclear Engineering Division
  • ISBN: 978-0-7918-5021-3
  • Copyright © 2016 by ASME


A lab-scale packed-bed system was used to test an industry scalable latent heat thermal energy storage (TES) system suitable for supplementing heat to a steam powered cycle. Metallic cylindrical capsules were filled with a eutectic of sodium sulfate (Na2SO4) and potassium chloride (KCl) as the phase change material (PCM) for energy storage. The packed bed system consisted of a cylindrical storage tank with the cylindrical capsules arranged vertically. This system was modeled and validated. The charging and discharging efficiencies of different operating parameters were analyzed. The calculated ratio of exergy to energy efficiency was around 90%. The overall efficiency of the bed, however, was found to be low due to the losses through the packed bed. Possible losses and limitations of the system were analyzed, and recommendations were made for improved designs.

Copyright © 2016 by ASME



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