0

Full Content is available to subscribers

Subscribe/Learn More  >

Heat Transfer Analysis for Thermal Energy Storage Using NaNO3 as Encapsulated Phase Change Material

[+] Author Affiliations
Weihuan Zhao, Ying Zheng, Joseph C. Sabol, Alparslan Oztekin, Sudhakar Neti, Kemal Tuzla, Wojciech M. Misiolek, John C. Chen

Lehigh University, Bethlehem, PA

Paper No. HT2012-58276, pp. 241-248; 8 pages
doi:10.1115/HT2012-58276
From:
  • ASME 2012 Heat Transfer Summer Conference collocated with the ASME 2012 Fluids Engineering Division Summer Meeting and the ASME 2012 10th International Conference on Nanochannels, Microchannels, and Minichannels
  • Volume 1: Heat Transfer in Energy Systems; Theory and Fundamental Research; Aerospace Heat Transfer; Gas Turbine Heat Transfer; Transport Phenomena in Materials Processing and Manufacturing; Heat and Mass Transfer in Biotechnology; Environmental Heat Transfer; Visualization of Heat Transfer; Education and Future Directions in Heat Transfer
  • Rio Grande, Puerto Rico, USA, July 8–12, 2012
  • Conference Sponsors: Heat Transfer Division
  • ISBN: 978-0-7918-4477-9
  • Copyright © 2012 by ASME

abstract

Storage of thermal energy is of practical interest for concentrated solar power (CSP) applications. Thermal energy storage (TES) for CSP systems has been accomplished with the use of liquid eutectic mixtures of KNO3 and NaNO3 that are exchanged between a cold and hot tank with appropriate heat exchangers in between. While such two tank systems primarily rely on the sensible heat of the fluid to store thermal energy the storage system that utilizes latent heat can significantly be smaller, more effective and less expensive. The current work is focused on TES at higher temperatures using encapsulated phase change material (EPCM) as NaNO3 encapsulated by stainless steel that is applicable to Rankine and other power generation cycles. We present here two dimensional transient heat transfer analysis for the NaNO3 encapsulated in a cylindrical shaped capsule for charging (storing thermal energy) and discharging (retrieving thermal energy) process. Energy stored and retrieved are in both sensible and latent heat form. Simulations are conducted for both vertically and horizontally placed cylindrical rods to investigate the effect of gravity on the charging and discharging process for various diameters of rods. It has been found that heat transfer into/from EPCM rods is not posing any problem for 6–8 hours storage/retrieval of thermal energy.

Copyright © 2012 by ASME

Figures

Tables

Interactive Graphics

Video

Country-Specific Mortality and Growth Failure in Infancy and Yound Children and Association With Material Stature

Use interactive graphics and maps to view and sort country-specific infant and early dhildhood mortality and growth failure data and their association with maternal

NOTE:
Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In