Ejectors are being used since decades for refrigeration application. Nowadays development in technologies has resulted in reducing energy consumption by using low grade waste heat energy. Lack of moving parts and simplicity in functioning make ejectors attractive in energy saving researches. This paper deals with CFD analysis of an ejector under various operating condition .Analysis shows that geometry and operating conditions has a tremendous impact on the working of the ejector. The different geometrical parameters associated with ejector analysis includes length and radius of constant area section ,nozzle exit radius ,nozzle exit position. The results of this study reveals that CFD is a useful tool in design and optimization of ejectors used in refrigeration applications.

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In this investigation, a thorough thermodynamic analysis of the water/lithium bromide absorption refrigeration cycle in the absence of solution heat exchanger is performed. The influence of operating temperature on the thermal loads of components, COPc (Carnot Coefficient of Performance), COPE (Enthalpy based Coefficient of Performance) and efficiency ratio (η) is studied. It is concluded that the COPc and COPE values decreases with increasing condenser and absorber temperature but increase with increasing generator and evaporator temperatures .