Abstract
Present study is concerned with the first and second laws of thermodynamics which has been carried out to ascertain the effect of varying the exit temperature of duratherm oil and evaporator temperature on the energetic and exergetic performance of a solar based integrated system. The energy and exergy efficiencies of the integrated system vary from 32% to 39% and 2.5% to 4.0%, respectively, with a rise in the hot oil outlet temperature from 160°C – 180°C. It is further shown that increase in evaporator temperature of transcritical CO2 cycle from -20°C to 0°C increases the energy efficiency from 27.45% to 43.27% and exergy efficiency from 2.51% to 2.97%, respectively. The results clearly show how the variation in the values of hot oil outlet temperature and the evaporator temperature of transcritical CO2 cycle strongly influences the attainable performance of the integrated system.