Full Content is available to subscribers

Subscribe/Learn More  >

Thermochemical Energy Storage Using Salt Hydrates

[+] Author Affiliations
Ganesh Balasubramanian, Mehdi Ghommem, Muhammad R. Hajj, Ishwar K. Puri

Virginia Tech, Blacksburg, VA

William P. Wong

Science Applications International Corporation, Ottawa, ON, Canada

Jennifer A. Tomlin

Science Applications International Corporation, Blacksburg, VA

Paper No. IMECE2010-39779, pp. 377-382; 6 pages
  • ASME 2010 International Mechanical Engineering Congress and Exposition
  • Volume 5: Energy Systems Analysis, Thermodynamics and Sustainability; NanoEngineering for Energy; Engineering to Address Climate Change, Parts A and B
  • Vancouver, British Columbia, Canada, November 12–18, 2010
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-4429-8
  • Copyright © 2010 by ASME


We investigate the capability of salt hydrates, using magnesium sulfate heptahydrate as a model salt, to store thermo-chemical energy as they dissociate into anhydrous salts or lower hydrates and water vapor upon heating. When salt hydrates are heated to the temperature required to activate the dehydration reaction, water desorption occurs from the compound. While thermal diffusion governs thermal transport below this reaction temperature, the heat transfer during the dehydration process is influenced by thermochemical kinetics. An anhydrous salt that has relatively higher energy content than its hydrated counterpart can be stably stored over long durations and transported at ambient temperatures. Thus, thermal energy can be released by allowing water vapor to flow across the anhydrous salt, which transforms its chemically stored heat into a sensible form. We model the thermochemical process based on the conservation of mass and energy and a relation describing the chemical kinetics, and employ finite difference technique to solve them. Different cases are considered to provide suggestions to improve the process performance. This storage application has potential for long-term thermal applications, e.g., for storing solar heat during summer months and releasing it in the winter to warm buildings.

Copyright © 2010 by ASME



Interactive Graphics


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

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