4. THERMODYNAMIC ANALYSIS To perform a thermodynamic analysis for an absorption refrigeration system, the mass and energy balance equations were applied to each component in the absorption system A standard set of condition for ammonia-water system is referred. With reference to the figure and applying the heat balance the operating conditions are obtained for a 1TR VAR system. The limiting conditions are decided. Engine cooling water assumed to be at 95oC, atmospheric air at 45oC and exhaust gas temperature at 200 oC. Considering the temperature of evaporator and condenser as the saturation temperature of the refrigerant used, the pressure in the evaporator and condenser are decided. The other pressures and temperature are decided based on data from references and practical conditions. Values of enthalpy are obtained from Steam Table & Enthalpy Concentration Diagram for Li-Br system and for Ammonia/water system Enthalpy Concentration Diagram & Pressure Temperature Diagram are referred. The configuration of a single effect absorption system is shown in figure 2 below. The system is to operate under following conditions: