Ali Behbahani-nia - Mechanical Engineering Department, K.N. Toosi University of Technology Tehran, Tehran, Iran
Saeed Shams - Mechanical Engineering Department, K.N. Toosi University of Technology Tehran, Tehran, Iran

The purpose of this research is to investigate thermoeconomic optimization and exergy analysis of transcritical CO2 refrigeration cycle with an ejector. After modeling thermodynamic equations of elements and considering optimization parameters of emerging temperature of gas of cooler (Tgc) , emerging pressure of cooler's gas (Pgc) , and evaporative temperature (Tevp) , optimization of target function is done. Target function indicates total expenses of the system during a year which is consisted of expenses of entering exergy and spending on the system's equipment. Optimized amplitude of decision variables are gained by the balance between the entering exergy and yearly initial capital investing. Results indicate reduction in yearly total expenses of system (34%) and enhancement in thermodynamic functionality coefficient and exergetic efficiency in optimum point toward end point.

Exergy, Refrigeration, Thermoeconomic, Transcritical CO2