Thermodynamic evaluation of new absorbent mixtures of lithium bromide and organic salts for absorption refrigeration machines |
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Authors: | Marina Donate, Luis Rodriguez, Antonio De Lucas,Juan F. Rodrí guez, |
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Affiliation: | Department of Chemical Engineering, University of Castilla-La Mancha, Avda. de Camilo José Cela s/n, 13004 Ciudad Real, Spain |
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Abstract: | Mixtures of lithium bromide and organic salts of sodium and potassium (formate, acetate and lactate) have been evaluated as alternative absorbents for absorption refrigeration machines. The main objective is to overpass the limitations of lithium bromide and improve the characteristics and the efficiency of the refrigeration cycle. In order to select the mixture that presents better properties for its employment in absorption refrigeration cycles, a thermodynamic analysis have been done. Density, viscosity, enthalpies of dilution, solubility and vapour pressure data of the proposed mixtures have been measured. A simulation program has been developed to evaluate temperatures, heats exchanged in the different sections and the efficiency of the cycle. |
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Keywords: | Absorption system Survey Mixture Absorbent Lithium bromide Sodium Potassium Thermodynamic property Physical property ModellingMots clé s: Systè me à absorption Enquê te Mé lange Absorbant Bromure de lithium Sodium Potassium Proprié té thermodynamique Proprié té physique Modé lisation |
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