THE THEORETICAL ANALYSIS OF H2O-LiBr ABSORPTION REFRIGERATION SYSTEM USING AL2O3 NANOPARTICLES

The objective of this paper is to investigate the effect of nanoparticles on Coefficient of Performance (COP) of absorption refrigeration system using H2O-LiBr by varying the generator, condenser and absorber temperature. The effect of nanoparticles on heat load of generator, condenser, evaporator and absorber at different operating temperatures was also studied in this work. The thermodynamic properties of H2O-LiBr solution were coded using Energy Equation Solver (EES) software. The result shows that COP and heat loads of a system with nanoparticles at different operating temperatures follow the same trend as a base fluid system. The COP of a system with nanoparticles at each operating temperature is higher than the base fluid system. The heat supplied to the generator with nanoparticles is less than the heat supplied to the generator without nanoparticles while heat rejected in condenser and absorber of a system with nanoparticles is higher than the system without nanoparticles at each operating temperature. The heat exchanged in evaporator of a system with nanoparticles is also higher than the system without nanoparticles at each operating temperature. The Coefficient of performance of the system was also investigated by varying the volume fraction of nanoparticles. We obtained maximum COP with 0.2% volume fraction of nanoparticles.