System Modeling and Parameter Effects on Design and Performance of a New Refrigeration Machine

This paper presents a thermodynamic model of a recent patent of a diffusion refrigeration machine. The thermodynamic simulation of this cycle is based on both mass and energy balances applied to each component of the cycle. The equations written for each component are coupled and must be resolved simultaneously. A set of independent data and assumptions, are considered. The set of resulting equations are solved using the EES software. The developed model predicts most of the features of the machine especially the coefficient of performance COP which reaches 0,5. A parametric study is performed in order to investigate the effects of the bypass introduced by this patent as well as the pinches of temperature, and the rate of degassing on the COP.