Indian Journal of Science and Technology

Abstract

Optimization studies of the CO₂ transcritical combined power refrigeration cycle are presented here. Steady state thermodynamic analysis including energy is carried out at various operating conditions employing a precision in-house property code CO₂ PROP. CO₂ transcritical combined power refrigeration cycle exhibits better performance than that of CO₂ transcritical refrigeration cycle alone. However, optimum gas cooler pressure does not change with the type of the system; it remains same for both the system; refrigeration and combined cycle. However, system performance is significantly affected by the evaporator pressure and compressor isentropic efficiency unlike the CO₂ transcritical refrigeration system Combined cycle exhibits significant improvement in COP at relatively higher evaporative temperature. However, at lower evaporator temperature cooling cycle shows better performance.
Keywords: CO₂ , Combined Cycle, Transcritical