PERFORMANCE ANALYSIS OF A STEAM TURBINE POWER PLANT AT PART LOAD CONDITIONS

Power consumption highly increases which is related with the growing of the industrial plants and daily using. Increasing power demand can be supplied with building up more efficient plants or optimized old power plants. One of the most important items of a power plant is steam turbine which is designed according to defined parameters (inlet pressure and temperature, flow rates, outlet pressure and power) which also effect the dimensions and performance of the turbine. Turbine loses and irreversibilities are minimum and so efficiencies and power generation are maximum at design conditions. However, power plants always have to operate at off-design or part-load conditions because of the changing of power demands and drop outs of the turbines and other items of the plants. In this study, it is aimed to analyses the isentropic efficiency of a high pressure steam turbine and thermal efficiency of power plant at different load conditions. Analyses showed that both steam turbines and power plant performance were reduced when the power plant operates at partial load conditions.

___

  • [1] “BP Energy Outlook 2035,” British Petroleum, Statistical Review, 2015.
  • [2] C. S. Bresolin, P. S. Schneider, H. A. Vielmo, and F. H. R. França, “Applications of Steam Turbines Simulation Models in Power Generations Systems,” Eng. Térmica Therm. Eng., vol. 5, no. 1, pp. 73–77, Jul. 2006.
  • [3] C. D. Weir, “An Analytical Approach to the Estimation of the Performance of Steam Turbine Cycles Off-Design,” Proc. Inst. Mech. Eng. Part J. Power Energy, vol. 199, no. 1, pp. 33–43, Feb. 1985.
  • [4] D. H. Cooke, “Modeling of Off-Design Multistage Turbine Pressures by Stodola’s Ellipse.” Bechtel Power Co., Nov-1983.
  • [5] M. Petrovic and W. Riess, “Off-design flow analysis of low-pressure steam turbines,” Proc. Inst. Mech. Eng. Part J. Power Energy, vol. 211, no. 3, pp. 215–224, May 1997.
  • [6] N. Herzog, M. Binner, J. R. Seume, and K. Rothe, “Verification of Low-Flow Conditions in a Multistage Turbine,” pp. 563–574, Jan. 2007.
  • [7] G. A. Gerolymos and C. Hanisch, “Multistage three-dimensional Navier-Stokes computation of off-design operation of a four-stage turbine,” Proc. Inst. Mech. Eng. Part J. Power Energy, vol. 213, no. 4, pp. 243–261, Jun. 1999.
  • [8] L. He, “Computation of unsteady flow through steam turbine blade rows at partial admission,” Proc. Inst. Mech. Eng. Part J. Power Energy, vol. 211, no. 3, pp. 197–205, May 1997.
  • [9] M. Šťastný, P. Šafařík, I. Hořejší, and R. Matas, “Flow around the sections of rotor blading of a turbine stage with relatively long blades at off-design conditions,” Proc. Inst. Mech. Eng. Part J. Power Energy, vol. 211, no. 3, pp. 207–213, May 1997.
  • [10] A.. Mandal, “Off design performance prediction of steam turbines,” Department Of Mechanical Engineering Indian Institute Of Technology, Delhi, Project Report, 2005.