A Kalina cycle with ejector

• A Kalina cycle with ejector (EKalina cycle) based on Kalina cycle system 11 (KCS 11) is proposed.
• Substituting ejector for the throttle valve to avoid throttling losses improves the cycle performance.
• The net power output and thermal efficiency of EKalina cycle are higher than that of KCS 11.

A Kalina cycle with ejector (EKalina cycle) is proposed in this paper. In the EKalina cycle, an ejector is used to substitute for the throttle valve and the absorber in the Kalina cycle system 11 (KCS 11). The exhaust pressure of the expander is decreased by the ejector resulted in an increase of the working pressure difference of the expansion, and to increase the power output and the thermal efficiency of the cycle. The thermodynamic analyses and comparisons between the EKalina cycle and the KCS 11 are conducted on the cycle's power output, thermal efficiency with the low-grade heat source (LGHS). Water is chosen as the LGHS fluid, and the same temperature and mass flow rate of the water is the standard condition for the comparative analysis on the EKalina cycle and the KCS 11. Results show that the net power output and thermal efficiency of the EKalina cycle are higher than that of the KCS 11.