Theoretical Analysis for Solar Driven Mechanical Refrigeration Systems

Organic Rankine Cycle has become attractive due to the possibility of using low heat energies potential. Such a renewable source is solar energy. This paper presents a first law thermodynamic analysis of solar Rankine cooling system. It is analyzed the choosing of working fluids, depending on their thermodynamic properties, and the influence of generation and condensing temperatures on the overall efficiency of combined cycle. There were analyzed two working fluids: R 245fa and R 134a. The performed thermodynamic analysis showed that the thermodynamic performance R245fa performs better than R134a.