Thermal Analysis of Open-Cycle Regenerator Gas-Turbine Power-Plant

Authors: M. M. Rahman, Thamir K. Ibrahim, M. Y. Taib, M. M. Noor, Rosli A. Bakar

Abstract:

Regenerative gas turbine engine cycle is presented that yields higher cycle efficiencies than simple cycle operating under the same conditions. The power output, efficiency and specific fuel consumption are simulated with respect to operating conditions. The analytical formulae about the relation to determine the thermal efficiency are derived taking into account the effected operation conditions (ambient temperature, compression ratio, regenerator effectiveness, compressor efficiency, turbine efficiency and turbine inlet temperature). Model calculations for a wide range of parameters are presented, as are comparisons with simple gas turbine cycle. The power output and thermal efficiency are found to be increasing with the regenerative effectiveness, and the compressor and turbine efficiencies. The efficiency increased with increase the compression ratio to 5, then efficiency decreased with increased compression ratio, but in simple cycle the thermal efficiency always increase with increased in compression ratio. The increased in ambient temperature caused decreased thermal efficiency, but the increased in turbine inlet temperature increase thermal efficiency.

Keywords: Gas turbine, power plant, thermal analysis, regeneration

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1078287

References:

[1] P.K. Nag, 2008. Power plant engineering. New Delhi: Tata McGraw- Hill Publishing Company Limited, 2008.
[2] F.G. Mahmood, and D.D. Mahdi, "A new approach for enhancing performance of a gas turbine (case study: Khangiran Refinery)," Applied Energy, vol. 86, pp. 2750-2759, 2009.
[3] H. Saravanamuttoo, G. Rogers, H. Cohen, and P. Straznicky, "Gas Turbine Theory," England: Prentice Hall, 2009.
[4] M.J. Moran, and H.N. Shapiro, "Fundamentals of Engineering Thermodynamics," New York: John Wiley & Sons, INC, 2008.
[5] S.M. Mahmoudi, V. Zare, F. Ranjbar, and L. Farshi, "Energy and exergy analysis of simple and regenerative gas turbines inlet air cooling using absorption refrigeration," Journal of Applied Sciences, vol. 9, no. 13, pp. 2399-2407, 2009.
[6] J. Maria, and Y. Jinyue, "Humidified gas turbinesÔÇöa review of proposed and implemented cycles," Energy, vol. 30, pp. 1013- 1078, 2005.
[7] P.A. Dellenback, "Improved gas turbine efficiency through alternative regenerator configuration," Journal of Engineering for Gas Turbines and Power, vol. 124, pp. 441-446, 2002.
[8] A.F. Al-Sayed, "Aircraft Propulsion and Gas Turbine Engines," Boca Raton: Taylor & Francis, 2008.
[9] R.K. Naradasu, R.K. Konijeti, and V.R. Alluru, "Thermodynamic analysis of heat recovery steam generator in combined cycle power plant," Thermal Science, vol. 11, no. 4, pp. 143-156, 2007.
[10] P.A. Dellenback, "A reassessment of the alternative regeneration cycle," Journal of Engineering for Gas Turbines and Power, vol. 128, pp. 783-788, 2005.