Performance Simulation of Combined Cycle with Kalina Bottoming Cycle

Abstract

ABSTRACT The Kalina cycle has potential for improved performance regarding electrical efficiency, specific power output and cost of electricity compared with conventional technology because the mixture of working fluids enables efficient energy recovery. Thermodynamic analysis has been carried out for combined cycle with the Kalina bottoming cycle. In this work, the identified key parameters for the Kalina cycle are turbine inlet condition (pressure, temperature and concentration), separator temperature and ambient temperature. The effect of these parameters on exergy efficiency of combined cycle is examined. The combined cycle efficiency increases with the increase in the turbine inlet pressure, and the same decreases with increases in ambient temperature, turbine inlet temperature and its concentration. Heat recovery from exhaust decreases with increases in the separator temperature, and it does not alter the output of the combined cycle. The efficiency of the cycle is very sensitive to the turbine inle...