Numerical And Experimental Analysis On Engine Exhaust-powered Solid Adsorption Refrigerating Unit

There is a wide range of potential application of engine-exhaust powered adsorption refrigerating system due to the hazard of CFC's on the ozone layer. The purpose of this study was to investigate the performance and thermodynamic mechanism of an engine exhaust-powered adsorption refrigerating unit tube using CaCl2 as absorbent and NH3 as refrigerant. An one-dimensional non-equilibrium mathematical model was established to describe the performances of unit adsorbent bed. Finite difference forms of the equations were written in Matlab. A conventional test bed for investigating the inner properties of CaCl2-NH3 unit tube was developed and the real data were used to test the model. The working performances of the refrigerator were presented. It was concluded that the performances of unit tube were excellent, average refrigerating capacity was 66.4W and coefficient of performance was 0.2. By means of the experimental data, influences of operating, such as evaporating temperature, cooling water temperature and maximal desorption temperature and so on, were analyzed. The study in this paper can be considered as the basis for advanced engineering application.