Performance analysis of combined cycle power plant

Abstract

Combined cycle power plants (CCPPs) are in operation with diverse thermodynamic cycle configurations. Assortment of thermodynamic cycle for scrupulous locality is dependent on the type of fuel available and different utilities obtained from the plant. In the present paper, seven of the practically applicable configurations of CCPP are taken into consideration. Exergetic and energetic analysis of each component of the seven configurations is conducted with the help of computer programming tool, i.e., engineering equation solver (EES) at different pressure ratios. For Case 7, the effects of pressure ratio, turbine inlet temperature and ambient relative humidity on the first and second law is studied. The thermodynamics analysis indicates that the exergy destruction in various components of the combined cycle is significantly affected by the overall pressure ratio, turbine inlet temperature and pressure loss in air filter and less affected by the ambient relative humidity.

Keywords

first-law / second-law / exergy destruction / components

References

[1] Klara J M, Izsak M S, Wherley M R. Advanced power generation: the potential of indirectly-fired combined cycles. ASME Paper, 1995, Paper No. 95-GT-261

[2] Solomon P R, Serio M A, Cosgrove J E, Pines D S, Zhao Y, Buggeln R C, Shamroth S J. A coal-fired heat exchanger for an externally fired gas turbine. Journal of Engineering for Gas Turbines and Power, 1996, 118(1): 22–31

[3] McDonald C F, Wilson D G. The utilization of recuperated and regenerated engine cycles for high-efficiency gas turbines in the 21st century. Applied Thermal Engineering, 1996, 16(8–9): 635–653

[4] Jonsson M, Yan J. Humidified gas turbines—a review of proposed and implemented cycles. Energy, 2005, 30(7): 1013–1078

[5] McCarthy S J, Scott I. The WR-21 intercooled recuperated gas turbine engine—operation and integration into the royal navy type 45 destroyer system. Proceedings of ASME Turbo Expo 2002: Power for Land, Sea, and Air. Amsterdam, Netherlands, 2002, 977–984

[6] Vandervort C L, Bary M R, Stoddard L E, Higgins S T. Externally-fired combined cycle: repowering of existing steam plants. ASME Paper, 1993, Paper No. 93-GT-359

[7] Gaggioli R A. The concept of available energy. Chemical Engineering Science, 1961, 16(1–2): 87–96

[8] Dev N, Samsher, Kachhwaha S S, Attri R. Exergy analysis and simulation of a 30 MW cogeneration cycle. Frontiers of Mechanical Engineering, 2013, 8(2): 169–180

[9] Dev N, Samsher, Kachhwaha S S, Attri R. Development of reliability index for combined cycle power plant using graph theoretic approach. Ain Shams Engineering Journal, 2014, 5(1): 193–203

[10] Dev N, Goyal G K, Attri R, Kumar N. Graph theoretic analysis of advance combined cycle power plants alternatives with latest gas turbines. In: Proceedings of ASME 2013 Gas Turbine India Conference (GTINDIA2013). Bangalore, India, 2013

[11] Dev N, Samsher, Kachhwaha S S, Attri R. GTA-based framework for evaluating the role of design parameters in cogeneration cycle power plant efficiency. Ain Shams Engineering Journal, 2013, 4(2): 273–284

[12] Dev N, Samsher, Kachhwaha S S, Attri R. GTA modeling of combined cycle power plant efficiency analysis. Ain Shams Engineering Journal, 2015, 6(1): 217–237

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