Thermodynamic Analysis of Vapour Absorption Refrigeration Cycle Using Different Working Fluids

Abstract

All industrial process uses a lot of thermal energy by burning fossil fuel to produce steam or heat for the purpose. After the processes, heat is rejected to the surrounding as waste. This waste heat can be converted to useful refrigeration by using a heat operated refrigeration system, such as vapour absorption refrigeration system In this work, a thermodynamic analysis of ammonia lithium-nitrate water solution and ammonia water sodium hydroxide solution absorption refrigeration cycle has been studied at low generator temperature heat source 60 to 80 o C and the range of evaporator temperature -4 to 0 o C. The influences of operating temperature on the thermal load of components, coefficient of performance are investigated. The COP of the absorption system increases with increase in evaporator temperature and generator temperature.