Buoyancy driven mass transfer in a liquid desiccant storage tank

Josh A. Quinnell, Jane H Davidson

Research output: Contribution to conferencePaper

Abstract

A new concept for long-term solar storage is based on the absorption properties of aqueous calcium chloride. Water, diluted and concentrated calcium chloride solutions are stored in a single tank. An immersed heat exchanger and stratification manifold are used to preserve long-term sorption storage, and to achieve thermal stratification. The feasibility of the concept is demonstrated via measurements of velocity, CaCl2 mass fraction, and temperature in a 1500 liter prototype tank during sensible charging. Experiments are conducted over a practical range of the relevant dimensionless parameters. For Rayleigh numbers from 3.4×108 to 5.6×1010 and buoyancy ratios from 0.8 to 46.2, measured Sherwood numbers are 11±2 to 62±9 and the tank is thermally stratified. Convective mixing is inhibited by the presence of a steep density gradient at the interface between regions of differing mass fraction. The predicted storage time scales for the reported Sherwood numbers are 160 to 902 days.

Original languageEnglish (US)
Pages89-95
Number of pages7
DOIs
StatePublished - Jan 1 2012
EventASME 2012 6th International Conference on Energy Sustainability, ES 2012, Collocated with the ASME 2012 10th International Conference on Fuel Cell Science, Engineering and Technology - San Diego, CA, United States
Duration: Jul 23 2012Jul 26 2012

Other

OtherASME 2012 6th International Conference on Energy Sustainability, ES 2012, Collocated with the ASME 2012 10th International Conference on Fuel Cell Science, Engineering and Technology
CountryUnited States
CitySan Diego, CA
Period7/23/127/26/12

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Calcium chloride
Buoyancy
Mass transfer
Thermal stratification
Liquids
Heat exchangers
Sorption
Water
Experiments
Temperature

Cite this

Quinnell, J. A., & Davidson, J. H. (2012). Buoyancy driven mass transfer in a liquid desiccant storage tank. 89-95. Paper presented at ASME 2012 6th International Conference on Energy Sustainability, ES 2012, Collocated with the ASME 2012 10th International Conference on Fuel Cell Science, Engineering and Technology, San Diego, CA, United States. https://doi.org/10.1115/ES2012-91315

Buoyancy driven mass transfer in a liquid desiccant storage tank. / Quinnell, Josh A.; Davidson, Jane H.

2012. 89-95 Paper presented at ASME 2012 6th International Conference on Energy Sustainability, ES 2012, Collocated with the ASME 2012 10th International Conference on Fuel Cell Science, Engineering and Technology, San Diego, CA, United States.

Research output: Contribution to conferencePaper

Quinnell, JA & Davidson, JH 2012, 'Buoyancy driven mass transfer in a liquid desiccant storage tank' Paper presented at ASME 2012 6th International Conference on Energy Sustainability, ES 2012, Collocated with the ASME 2012 10th International Conference on Fuel Cell Science, Engineering and Technology, San Diego, CA, United States, 7/23/12 - 7/26/12, pp. 89-95. https://doi.org/10.1115/ES2012-91315
Quinnell JA, Davidson JH. Buoyancy driven mass transfer in a liquid desiccant storage tank. 2012. Paper presented at ASME 2012 6th International Conference on Energy Sustainability, ES 2012, Collocated with the ASME 2012 10th International Conference on Fuel Cell Science, Engineering and Technology, San Diego, CA, United States. https://doi.org/10.1115/ES2012-91315
Quinnell, Josh A. ; Davidson, Jane H. / Buoyancy driven mass transfer in a liquid desiccant storage tank. Paper presented at ASME 2012 6th International Conference on Energy Sustainability, ES 2012, Collocated with the ASME 2012 10th International Conference on Fuel Cell Science, Engineering and Technology, San Diego, CA, United States.7 p.
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