Automotive air conditioning system with an internal heat exchanger using R1234YF and different evaporation and condensation temperatures

Abstract

This study presents the energy and exergy analysis of a R1234yf automotive air conditioning system. For this aim, an experimental baseline automotive air conditioning system was developed and a double pipe internal heat exchanger was employed to the system. The detailed performance comparison of the system under different condensation and evaporation temperatures was studied for both the baseline system and the system with the internal heat exchanger. For this, the cooling capacity, COP, and the total exergy destruction per cooling capacity were evaluated. Additionally, the volumetric and isentropic efficiencies of the compressor were investigated. It was determined that the internal heat exchanger has increased COP and decreased exergy destruction per cooling capacity by 4%-6% and 13%-16%, respectively.