| In the first section of this thesis, a relationship for the solid-vapor adsorption equilibrium is proposed and proved to represent accurately the experimental data and to be convenient for numerical calculations. Formulas describing the processes involved in closed-cycle cooling and heating systems are also derived.; These formulas are first applied in a dynamic analysis of a closed-cycle solar adsorption refrigerator. A computer program is written to study the effect of the design parameters and operating conditions on the system performance.; The second application concerns the simulation of the regenerative adsorption cooling systems which are recently introduced to increase the performance of adsorption machines. A computer program is developed to analyze the dynamic behaviour of such systems.; In the second section, an analytical investigation of the vapor-liquid absorption is presented. Closed-form solutions are obtained where the depth of the absorbing solution is taken into account. The effect of interfacial instability on heat and mass transfer is also modeled by introducing constant heat and mass transfer coefficients. Comparison with experimental data permits the determination of Lewis, Nusselt and Sherwood Numbers.; Finally an analysis of the fully developed natural convection heat and mass transfer between two inclined parallel plates is presented. Solvability conditions are determined and closed-form expressions for the temperature and concentration obtained. |
