Abstract—Turbine blade cooling has been considered as the most effective way for maintaining high operating temperatures while making use of the available component material and has been a challenging area for improving the performance of gas turbine systems. In this work, exergy analysis of the wet-compression gas turbine cycle with recuperator and turbine blade cooling is performed. The exergy destructions in the system components and cycle exergy efficiency are estimated for varying pressure ratios and water injection ratios. Exergy destruction in the combustor and exergy loss due to exhaust gas are dominant and larger for higher pressure ratios and lower water injection ratios. Consequently the exergy efficiency decreases with pressure ratio but can be improved by injecting more water.

Index Terms—water injection, wet compression, gas turbine, turbine blade cooling, exergy

Cite: Kyoung Hoon Kim and Hyung Jong Ko , "Exergy Analysis of Wet-Compression Gas Turbine Cycle with Recuperator and Turbine Blade Cooling ," Journal of Automation and Control Engineering, Vol.1, No.2, pp. 140-143, June 2013. doi: 10.12720/joace.1.2.140-143