Assessment of a Real Combined Cycle Power Plant with Supplementary Firing Based on Advanced Exergy/Exergoeconomic Methods

Document Type : Research Paper


1 Department of Mechanical Engineering, Alzahra University, Tehran, Iran

2 Department of Mechanical Engineering, Faculty of Engineering and Technology, Alzahra University, Tehran, Iran


This research performs the advanced exergy and exergoeconomic analyses of a combined cycle power plant (CCPP) located in Zavareh, Iran. The objective of this research is to evaluate the irreversibilities, their related cost rates of each part of the CCPP that can be avoided and the inefficiencies of each part that caused by other components. The advanced exergy and exergoeconomic analyses indicate that the most of the exergy destructions and their related cost rates within the combustion chambers and heat recovery steam generaters (HRSGs) are related to their performance. So, the focus should be on improving the performance of these components themselves, rather than the effects of the remaining components. Results indicate that system’s improvement potential of the overall system and its related cost rate are 14% and 15%, respectively. Also, the improvement potential for the investment flow rate of the system is weak because 75% of them are unavoidable


Main Subjects

[1] Carapellucci, R., and Milazzo, A., "Repowering Combined Cycle Power Plants by a Modified STIG Configuration", Energy Conversion and Management, Vol. 48, pp. 1590-1600, (2007).
[2] Marrero, I.O., Lefsaker, A.M., Razani, A., and Kim, K.J., "Second Law Analysis and Optimization of a Combined Triple Power Cycle", Energy Conversion and Management, Vol. 43, pp. 557-573, (2002).
[3] Kaviri, A.G., Jaafar, M.N.M., and Lazim, T.M., "Modeling and Multi-objective Exergy Based Optimization of a Combined Cycle Power Plant using a Genetic Algorithm", Energy Conversion and Management, Vol. 58, pp. 94-103, (2012).
[4] Franco, A., and Russo, A., "Combined Cycle Plant Efficiency Increase Based on the Optimization of the Heat Recovery Steam Generator Operating Parameters", International Journal of Thermal Sciences, Vol. 41, pp. 843-859, (2002).
[5] Cihan, A., and Hacıhafızogˇlu, O., "Energy–exergy Analysis and Modernization Suggestions for a Combined-cycle Power Plant", International Journal of Energy Research, Vol. 30, pp. 115-126, (2006).
[6] Bassily, A.M., "Modeling, Numerical Optimization, and Irreversibility Reduction of a Triple-pressure Reheat Combined Cycle", Energy, Vol. 32, pp. 778-794, (2007).
[7] Sanjay, Y., Singh, O., and Prasad, B.N., "Energy and Exergy Analysis of Steam Cooled Reheat Gas–steam Combined Cycle", Applied Thermal Engineering, Vol. 27, pp. 2779-2790, (2007).

[8] Ameri, M., Ahmadi, P., and Khanmohammadi, S., "Exergy Analysis of a 420 MW Combined Cycle Power Plant", International Journal of Energy Research, Vol. 32, pp. 175-183, (2008).
[9] Ahmadi, P., and Dincer, I., "Thermodynamic Analysis and Thermoeconomic Optimization of a Dual Pressure Combined Cycle Power Plant with a Supplementary Firing Unit", Energy Conversion and Management, Vol. 52, pp. 2296-2308, (2011).
[10] Hajabdollahi, H., Ahmadi, P., and Dincer, I., "An Exergy-based Multi-objective Optimization of a Heat Recovery Steam Generator (HRSG) in a Combined Cycle Power Plant (CCPP) using Evolutionary Algorithm", International Journal of Green Energy, Vol. 8, pp. 44-64, (2011).
[11] Sanjay, Y., "Investigation of Effect of Variation of Cycle Parameters on Thermodynamic Performance of Gas-steam Combined Cycle", Energy, Vol. 36, pp. 157-167, (2011). 
[12] Ibrahim, T.K., and Rahman, M.M., "Effect of Compression Ratio on Performance of Combined Cycle Gas Turbine", International Journal of Energy Engineering, Vol. 2, pp. 9-14, (2012).
[13] Tajik Mansouri, M., Ahmadi, P., and Kaviri, A.G., "Exergetic and Economic Evaluation of the Effect of HRSG Configurations on the Performance of Combined Cycle Power Plants", Energy Conversion and Management, Vol. 58, pp. 47-58, (2012).
[14] Ibrahim, T.K., and Rahman, M.M., "Study on Effective Parameter of the Triple-pressure Reheat Combined Cycle Performance", Thermal Science, Vol. 17, pp. 497-508, (2013).
[15] Kaviri, A.G., Jaafar, M.N.M., Lazim, T.M., and Barzegaravval, H., "Exergo EnvironmentalOptimization of Heat Recovery Steam Generators in Combined Cycle Power PlantThrough Energy and Exergy Analysis", Energy Conversion and Management, Vol. 67,pp. 27-33, (2013).
[16] Taghavi, M., Abdollahi, M., and Salehi, G., "Thermodynamic and Thermo Economic Optimization of Combined Cycle Power Plant", International Journal of Materials, Mechanics and Manufacturing, Vol. 1, pp. 186-190, (2013).
[17] Ghazi, M., Ahmadi, P., and Salehi, G.,"Modeling and Thermo-economic Optimization of Heat Recovery Heat Exchangers using a Multimodal Genetic Algorithm", Energy Conversion and Management, Vol. 58, pp. 149-156, (2012).
[18] Kotas, T.J., "The Exergy Method of Thermal Plant Analysis", Chemie Ingenieur Technik, Vol. 59, pp. 365-365, (1987).
[19] Yang, H., "Advanced Exergy Analysis for a Solar Double Stage Absorption Chiller", Dissertations, Doctoral Thesis, Dep. of Architecture, Carnegie Mellon University, Pennsylvania, United State, (2012).
[20] Petrakopoulou, F., "Comparative Evaluation of Power Plants with CO2 Capture: Thermodynamic, Economic and Environmental Performance", Berlin Technical University, Institut für Energietechnik, Doctoral Thesis, (2010).

[21] Açýkkalp, E., Aras, H., and Salehi, G., "Advanced Exergoeconomic Analysis of a Trigeneration System using a Diesel-gas Engine", Applied Thermal Engineering, Vol. 67, pp. 388-395, (2014).

[22] Tsatsaronis, G., "Recent Developments in Exergy Analysis and Exergoeconomics", International Journal of Exergy, Vol. 5, pp. 489-499, (2008).
[23] Morosuk, T., and Tsatsaronis, G., "Advanced Exergy Analysis for Chemically Reacting Systems–Application to a Simple Open Gas-turbine System", Institute of Marine Propulsion Plants Operation, Maritime Academy of Szczecin, Poland Institute for Energy Engineering, Technische Universität Berlin, Germany Int. J. of Thermodynamics, Vol. 12, pp. 105-111, (2009 ).

[24] Tsatsaronis, G., and Morosuk, T., "Understanding and Improving Energy Conversion Systems with the Aid of Exergy–based Methods", International Journal of Exergy, Vol. 11, pp. 518-542, (2012).

[25] Tsatsaronis, G., and Park, M. H., "On Avoidable and Unavoidable Exergy Destructions and Investment Costs in Thermal Systems", Energy Conversion and Management, Vol. 43, pp. 1259-1270, (2002).
[26] Morosuk, T., Tsatsaronis, G., and Schult, M., "Conventional and Advanced Exergetic Analyses: Theory and Application", Arabian Journal for Science and Engineering, Vol. 38, pp. 395-404, (2013).

[27] Kelly, S., Tsatsaronis, G., and Morosuk, T., "Advanced Exergetic Analysis: Approaches for Splitting the Exergy Destruction into Endogenous and Exogenous Parts", Energy, Vol. 34, pp. 384-391, (2009).
[28] Tsatsaronis, G., and Morosuk, T., "Advanced Exergetic Analysis of a Novel System for Generating Electricity and Vaporizing Liquefied Natural Gas", Energy, Vol. 35, pp. 820-829, (2010).
[29] Petrakopoulou, F., Tsatsaronis, G., and Morosuk, T., "Cost Reduction Strategies for an Oxy-fuel Power Plant with CO2 Capture: Application of an Advanced Exergoeconomic Analysis to an Advanced Zero Emission Plant", IMECE2011, Vol. 4, Energy Systems Analysis, Thermodynamics and Sustainability; Combustion Science and Engineering; Nanoengineering for Energy, Parts A and B Denver, Colorado, USA, November 11–17, (2011).

[30] Wang, L., Yang, Y., Morosuk, T., and Tsatsaronis G., "Advanced Thermodynamic Analysis and Evaluation of a Supercritical Power Plant", Energies, Vol. 5, pp. 1850-1863, (2012).

[31] Morosuk, T., Tsatsaronis, G., Boyano, A., and Gantiva, C., "Advanced Exergy-based Analyses Applied to a System Including LNG Regasification and Electricity Generation", International Journal of Energy and Environmental Engineering, Vol. 3, pp. 1-9, (2012).
[32] Hepbasli, A., and Keçebaş, A., "A Comparative Study on Conventional and Advanced Exergetic Analyses of Geothermal District Heating Systems Based on Actual Operational Data", Energy and Buildings, Vol. 61, pp. 193-201, (2013).
[33] Keçebaş, A., and Hepbasli, A., "Conventional and Advanced Exergoeconomic Analyses of Geothermal District Heating Systems", Energy and Buildings, Vol. 69, pp. 434-441, (2014).
[34] Tan, M., and Keçebaş, A., "Thermodynamic and Economic Evaluations of a Geothermal District Heating System using Advanced Exergy-based Methods", Energy Conversion and Management, Vol. 77, pp. 504-513, (2014).
[35] Cziesla, F., Tsatsaronis, G., and Gao, Z., "Avoidable Thermodynamic Inefficiencies and Costs in an Externally Fired Combined Cycle Power Plant", Energy, Vol. 31, pp. 1472-1489, (2006).
[36] Petrakopoulou, F., Tsatsaronis, G., Morosuk, T., and Carassai, A., "Conventional and Advanced Exergetic Analyses Applied to a Combined Cycle Power Plant", Energy, Vol. 41, pp. 146-152, (2012).
[37] Petrakopoulou, F., Tsatsaronis, G., and Morosu, T., "Environmental Evaluation of a Power Plant using Conventional and Advanced Exergy-based Methods", Energy, Vol. 45, pp. 23-30, (2012).

[38] Soltani, S., Yari, M., Mahmoudi, S.M.S., and Morosuk, T., "Advanced Exergy Analysis Applied to an Externally-fired Combined-cycle Power Plant Integrated with a Biomass Gasification Unit", Energy, Vol. 59, pp. 775-780, (2013).

[39] Vučković, G.D., Stojiljković, M.M., and Vukić, M.V., "Advanced Exergy Analysis and Exergoeconomic Performance Evaluation of Thermal Processes in an Existing Industrial Plant", Energy Conversion and Management", Vol. 85, pp. 655-662, (2014).

[40] Açıkkalp, E., Aras, H., and Hepbasli, A., "Advanced Exergy Analysis of an Electricity Generating Facility using Natural Gas", Energy Conversion and Management, Vol. 82, pp. 146-153, (2014).

[41] Açıkkalp, E., Aras, H., and Hepbasli, A., "Advanced Exergoeconomic Analysis of an Electricity-generating Facility that Operates with Natural Gas", Energy Conversion and Management, Vol. 78, pp. 452-460, (2014).

[42] Dincer, I., and Rosen, M., "Exergy Energy, Environment, and Sustainable Development", Elsevier, Amsterdam, London, (2007).

[43] Rosen, M.A., and Dincer, I., "Thermoeconomic Analysis of Power Plants: An Application to a Coal Fired Electrical Generating Station", Energy Conversion and Management, Vol. 44, pp. 2743-2761, (2003).
[44] Bejan, A., and Tsatsaronis, G., "Thermal Design and Optimization", John Wily & Sons,
New York, (1996).

[45] Tsatsaronis, G., and Winhold, M., "Exergoeconomic Analysis and Evaluation of Energyconversion Plants-I. A New General Methodology", Energy, Vol. 10, pp. 69-80, (1985).

[46] Lazzaretto, A., and Tsatsaronis, G., "SPECO: A Systematic and General Methodology for Calculating Efficiencies and Costs in Thermal Systems", Energy, Vol. 31, pp. 1257-1289, (2006).

[47] Petrakopoulou, F., Boyano, A., and Cabrera, M., "Exergoeconomic and Exergoenvironmental Analyses of a Combined Cycle Power Plant with Chemical Looping Technology", International Journal of Greenhouse Gas Control, Vol. 5, pp. 475-482, (2011).

[48] Phil, M., and Kelly, S., "Energy Systems Improvement Based on Endogenous and Exogenous Exergy Destruction",Technische Universität Berlin, Doctoral Thesis, (2008). 

[49] Morosuk, T., and Tsatsaronis, G., "A New Approach to the Exergy Analysis of Absorption Refrigeration Machines", Energy, Vol. 33, pp. 890-907, (2008).

[50] Morosuk, T., and Tsatsaronis, G., "Advanced Exergetic Evaluation of Refrigeration Machines using Different Working Fluids", Energy, Vol. 34, pp. 2248-2258, (2009).