Exergoeconomic and Environmental Analysis and Multi-Objective Optimization of a New Regenerative Gas Turbine Combined Cycle

Combined cycle systems have an important role in power generation. In the present study, three different configurations of combined Brayton and Rankine cycle system are studied from the perspective of energy, exergy, exergoeconomic and environmental perspectives. Results indicate that it depends on the preferences and criteria of each decision maker to select the best configuration among the three proposed configurations as the final configuration. For the purpose of parametric analysis, the effect of changing various parameters such as compressor pressure ratio, gas turbine inlet temperature on the output work, exergy efficiency, exergy-economic and environmental parameters is studied. In addition, an attempt is made to optimize the performance of combined cycle systems considering three objective functions of exergy efficiency, total cost rate and exergy unit cost of produced electricity.

Automated summary

This study examines three different configurations of combined cycle systems and concludes that the selection of the best configuration depends on the preferences and criteria of decision makers. Parametric analysis is conducted by changing various parameters to study the effects on output work, exergy efficiency, exergy-economic and environmental parameters. The study also attempts to optimize the performance of combined cycle systems considering three objective functions of exergy efficiency, total cost rate, and exergy unit cost of produced electricity.