Aqueous calcium chloride has a number of potential advantages as a compact and long-term solar storage medium compared with sensibly heated water. The combination of sensible and chemical binding energy of the liquid desiccant provides higher energy densities and lower thermal losses, as well as a temperature lift during discharge via an absorption heat pump. Calcium chloride is an excellent choice among desiccant materials because it is relatively inexpensive, nontoxic, and environmentally safe. This paper provides an overview of its application for solar storage and presents a novel concept for storing the liquid desiccant in a single storage vessel. The storage system uses an internal heat exchanger to add and discharge thermal energy and to help manage the mass, momentum, and energy transfer in the tank. The feasibility of the proposed concept is demonstrated via a computational fluid dynamic study of heat and mass transfer in the system over a range of Rayleigh, Lewis, Prandtl, and buoyancy ratio numbers expected in practice.
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February 2011
Research Papers
Liquid Calcium Chloride Solar Storage: Concept and Analysis
Jay Burch
Jay Burch
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Josh A. Quinnell
Jane H. Davidson
Jay Burch
J. Sol. Energy Eng. Feb 2011, 133(1): 011010 (8 pages)
Published Online: February 3, 2011
Article history
Received:
April 9, 2010
Revised:
December 14, 2010
Online:
February 3, 2011
Published:
February 3, 2011
Citation
Quinnell, J. A., Davidson, J. H., and Burch, J. (February 3, 2011). "Liquid Calcium Chloride Solar Storage: Concept and Analysis." ASME. J. Sol. Energy Eng. February 2011; 133(1): 011010. https://doi.org/10.1115/1.4003292
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