Thermodynamic and thermoeconomic analysis of a novel combined cooling and power (CCP) cycle

A new combined cooling and power (CCP) cycle is proposed by a novel combination of the Kalina cycle (KC) and ejector refrigeration cycle (ERC) to produce simultaneous power output and cooling output. The exhaust of the turbine is fed to the ejector as a primary flow to draw the secondary flow (outlet of the evaporator) into the ejector. Energy, exergy, and exergoeconomic analysis of the proposed cycle are carried out leading to determine the first-law-efficiency, the second-law-efficiency, the sum unit cost of the product (SUCP) of the system, and the main source of the irreversibility. The thermal efficiency, exergy efficiency, overall exergy destruction rate, SUCP of the system, net produced power, and cooling capacity of the cycle are calculated 33.65%, 10.78%, 348.4 kW, 256.1 $/GJ, 33.65 kW, and 160.6 kW, respectively. Moreover, the parametric study of some key parameters (i.e., vapor generator pressure, evaporator temperature, condenser 2 pinch point temperature, ammonia concentration, turbine expansion ratio, and heat source temperature) on the main thermodynamic performance criteria is conducted. Based on this study it is found that increasing ammonia concentration and heat source temperature decreases the thermal efficiency, exergy efficiency, and SUCP of the system. Moreover, an increase in the turbine expansion ratio decreases the thermal efficiency and the SUCP of the system, while increases the exergy efficiency.