Enhanced performance of a modified tc-CO2 refrigeration system aided with an absorption chiller - an exergetic and energetic analysis

The present study analyses thermodynamically a novel tc-CO2 refrigeration system designed for low-temperature refrigeration. Subcooling is achieved through a single-effect absorption chiller, using compression-generated heat. A work recovery turbine reduces throttling losses and electricity consumption. Performance enhancements are obtained via parametric analysis and optimisation. The integrated system is compared with basic tc-CO2 configurations with a work recovery turbine. Results show a 28.83% performance enhancement over the TCRST for an evaporator temperature of -35 degrees C and a heat rejection temperature of 35 degrees C. This research underscores the effectiveness of the integrated system in improving refrigeration performance under various conditions.