Browse > Article
http://dx.doi.org/10.3795/KSME-B.2012.36.2.171

Influence of Precooling Cooling Air on the Performance of a Gas Turbine Combined Cycle  

Kwon, Ik-Hwan (Graduate School, Inha Univ.)
Kang, Do-Won (Graduate School, Inha Univ.)
Kang, Soo-Young (Graduate School, Inha Univ.)
Kim, Tong-Seop (Dept. of Mechanical Engineering, Inha Univ.)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.36, no.2, 2012 , pp. 171-179 More about this Journal
Abstract
Cooling of hot sections, especially the turbine nozzle and rotor blades, has a significant impact on gas turbine performance. In this study, the influence of precooling of the cooling air on the performance of gas turbines and their combined cycle plants was investigated. A state-of-the-art F-class gas turbine was selected, and its design performance was deliberately simulated using detailed component models including turbine blade cooling. Off-design analysis was used to simulate changes in the operating conditions and performance of the gas turbines due to precooling of the cooling air. Thermodynamic and aerodynamic models were used to simulate the performance of the cooled nozzle and rotor blade. In the combined cycle plant, the heat rejected from the cooling air was recovered at the bottoming steam cycle to optimize the overall plant performance. With a 200K decrease of all cooling air stream, an almost 1.78% power upgrade due to increase in main gas flow and a 0.70 percent point efficiency decrease due to the fuel flow increase to maintain design turbine inlet temperature were predicted.
Keywords
Gas Turbine; Combined Cycle; Turbine Cooling; Pre-Cooling;
Citations & Related Records

Times Cited By SCOPUS : 1
연도 인용수 순위
  • Reference
1 Farmer, R., 2009, Gas Turbine World 2009 GTW Handbook, Vol. 27, Pequot Prblishing Inc., pp. 75.
2 Kim, Y. S., Lee, S. J., Kim, T. S., Sohn, J. L. and Joo, Y. J., 2010, "Performance Analysis of a Syngas-fed Gas Turbine Considering the Operating Limitations of its Components," Applied Energy, Vol. 87, pp. 1602-1611.   DOI   ScienceOn
3 Cohn, A. and Waters, M., 1982, "The Effect of Alternative Cooling Schemes on the Performance of Utility Gas Turbine Power Plants," ASME paper, 82-JPGC-GT-19, pp. 1-10.
4 Saravanamuttoo, HIH., Rogers, GFC. and Cohen, H., 2001, Gas Turbine Theory 5th edition, Pearson Education Limited, England, pp. 306-373.
5 Moustapha, H., Zelesky, M. F., Banies, N. C. and Japikse, D., 2003, Axial and Radial Turbines, Concepts NREC, USA, pp. 1-29.
6 Horlock, J. H., 2001, "The Basic Thermodynamics of Turbine Cooling," Journal of Turbomachinery, Vol. 123, pp. 583-592.   DOI   ScienceOn
7 Horlock, J. H., Watson, D. T. and Jones, T. V., 2001, "Limitations on Gas Turbine Performance Imposed by Large Turbine Cooling Flows," Journal of Engineering for Gas Turbines and Power, Vol. 123, pp. 487-494   DOI   ScienceOn
8 Young, J, B. and Horlock, J, H., 2006, "Defining the Efficiency of a Cooled Turbine," Journal of Turbomachinery, Vol. 128, pp. 658-667.   DOI   ScienceOn
9 Horlock, J. H. and Torbidoni, L., 2008, "Calculations of Cooled Turbine Efficiency," Journal of Engineering for Gas Turbines and Power, Vol. 130, 011703.   DOI   ScienceOn
10 Kawaike, K., Kobayashi, N. and Ikeguchi, T., 1984, "Effect of New Blade Cooling System With Minimized Gas Temperature Dilution on Gas Turbine Performance," Journal of Engineering for Gas Turbines and Power, Vol. 106, pp. 756-764.   DOI
11 Torbidoni, L. and Horlock, J, H., 2005, "A New Method to Calculate the Coolant Requirements of a High-Temperature Gas Turbine Blade," Journal of Turbomachinery, Vol. 127, pp. 191-199.   DOI   ScienceOn
12 Jordal, K., Torbidoni, L. and Massardo, A. F., 2001, "Convective Blade Cooling Modeling for the Analysis of Innovative Gas Turbine Cycles," ASME Paper No.2001-GT-0390.
13 Kwon, I. H., Kang, D. W., Kim, T. S. and Sohn, J. L., 2010, "Influences of Cooling Air Temperature and Flow Rate Variations on Gas Tubine Performance," Proceedings of the KSME 2010 Spring Annual Meeting, pp. 9-10.
14 GateCycle ver. 6.0., 2006, Enter Software.