Properties of seawater bitterns with regard to liquid-desiccant cooling

Lychnos, Georgios, Fletcher, John P. and Davies, Philip A. (2010). Properties of seawater bitterns with regard to liquid-desiccant cooling. Desalination, 250 (1), pp. 172-178.

Abstract

This study concerns the properties of the concentrated bittern solutions occurring as by-product from solar salt works, in relation to their potential use as liquid desiccants in cooling systems. Solutions of compositions similar to those of bitterns have been made up in the laboratory, as have concentrated mixtures of MgCl2–MgSO4–H2O. Measurements of vapour pressure have been carried out using an isoteniscope and are reported together with measurements of density and viscosity. Several theoretical models representing these properties are reviewed and compared against the experimental results; the average agreement between theory and experiment is within 5% for vapour pressure and better for the preferred models of the other two properties. Based on these findings, an expression is provided for the equilibrium relative humidity of bitterns as a function of concentration relative to raw seawater. The vapour pressures of bittern solutions are found to be similar to those of solutions containing only magnesium chloride but having the same mass fraction of total salts. Therefore magnesium chloride solution is a reasonable model for bitterns for the purpose of developing the proposed cooling system.

Publication DOI: https://doi.org/10.1016/j.desal.2008.11.019
Divisions: Engineering & Applied Sciences > Chemical Engineering & Applied Chemistry
Engineering & Applied Sciences > Computer Science
Engineering & Applied Sciences > Mechanical Engineering & Design
Engineering & Applied Sciences > Sustainable environment research group
Additional Information: © 2009 Elsevier B.V. Open access under CC BY-NC-ND license
Uncontrolled Keywords: bitterns,solar energy,liquid desiccant,greenhouse cooling,seawater properties,Chemical Engineering(all),Mechanical Engineering,Chemistry(all),Materials Science(all),Water Science and Technology
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Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
https://www.sci ... 842X?via%3Dihub (Publisher URL)
Published Date: 2010-01-01
Authors: Lychnos, Georgios
Fletcher, John P.
Davies, Philip A. ( 0000-0003-4783-1234)

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