| Issue |
J. Chim. Phys.
Volume 86, 1989
|
|
|---|---|---|
| Page(s) | 2125 - 2148 | |
| DOI | https://doi.org/10.1051/jcp/1989862125 | |
| Published online | 29 May 2017 | |
Mélange eau-glycérol. Données thermodynamiques en vue de la simulation de cycles à absorption
1 E.N.S.I.G.C. Toulouse, France.
2 Dept. de Quimica (Tarragona). Universtat de Barcelone, Espagne.
La simulation des machines à absorption nécessite la connaissance des équilibres et des enthalpies des mélanges utilisés. C’est dans ce but qu’a été entreprise l’étude sur le système eau-glycérol. Des corrélations permettant le calcul des concentrations à l’équilibre par la méthode de BARKER ainsi que des enthalpies ont été développées. Un exemple de performances de cycle à absorption est montré.
Abstract
The simulation of absorption machines (heating mode or cooling mode) needs some data such as equilibrium (temperature, pressure, concentration) and enthalpies (liquid and gaseous phase). On the other hand the lithium bromide-water system is often used but at high temperatures there are some corrosion problems. This is the reason why the water-glycerol mixture has been selected. Due to a lack of data and the discrepencies there in, liquid-vapor equilibrium has been measured and BARKER’S method has been used for the correlations of activity coefficients. A correlation of the enthalphy of solutions, temperature and concentrations is also given. The degree of freedom of an absorption cycle is six, so from six kinds of data it is shown how to obtain the other variables of the cycle. Results of the simulation (coefficient of performance versus generator temperature) are given.
© Paris : Société de Chimie Physique, 1989