Thermodynamic feasibility study of absorption diffusion machine working with hydrocarbons

We propose in this work a thermodynamic feasibility study of absorptiondiffusion refrigerating machine working with hydrocarbon mixtures. We used a machine of low power (300 W) that operates with generator temperatures lower than 150 °C (fossil energy or solar energy can be used) and where the condenser and absorber temperatures are taken equal to 42 °C. The inert gas used is helium and the total functioning pressure is about 17.5 bars. A modeling on suitable software was made to simulate the machine functioning for four binary mixtures which are: propylene/hexane, propylene/heptane, propylene/octane and propylene/nonane. The validation of our model was made by comparison with the results taken from literature and the optimal operating conditions are determined.