International Journal of Energy and Sustainable Development
Articles Information
International Journal of Energy and Sustainable Development, Vol.3, No.1, Mar. 2018, Pub. Date: Apr. 9, 2018
Techno-Economic and Environmental Impact Analysis of a Combined Cycle Power Plant with Internal Cooling of Inlet Air Streams to the Compressor and Condenser
Pages: 8-28 Views: 753 Downloads: 672
[01] Ifeanyi Henry Njoku, Department of Mechanical Engineering, Faculty of Engineering, University of Port Harcourt, Choba, Port Harcourt, Nigeria.
[02] Chika Oko, Department of Mechanical Engineering, Faculty of Engineering, University of Port Harcourt, Choba, Port Harcourt, Nigeria.
[03] Joseph Ofodu, Department of Mechanical Engineering, Faculty of Engineering, University of Port Harcourt, Choba, Port Harcourt, Nigeria.
This paper presents the thermodynamic, economic and environmental impact assessment of an existing combined cycle power plant to be retrofitted with a waste heat driven aqua lithium bromide absorption refrigerator for cooling the inlet air streams to the compressor and air cooled steam condenser. The power plant is located in the hot and humid tropical region of Nigeria, latitude 4°45′N and longitude 7°00′E. Using the operating data of the plant, the results of the analysis showed that by cooling the inlet air to the compressors to 15°C, the net power output of the gas turbine cycles increased by 48.3MW, and by cooling the inlet air streams to the air cooled steam condenser to 29°C, the net power output of the steam turbine cycle increased by 1.4MW. The overall thermal efficiency of the plant increased by 8.1% while the specific fuel consumption decreased by 7.0%. The stack flue gas exit temperature reduced from 126°C to 84°C in the absorption refrigerator, thus reducing the exhaust heat discharge rate to the atmosphere. The total capital cost, life cycle cost, annual sales revenue and net present value increased by 3.3%, 2.3%, 7.7% and 17%, respectively while the levelized cost of energy production in the plant and the break-even point of the investment reduced by 4.8% and 5.6%, respectively. Environmental impact analysis revealed that the emission rates of NOx and CO2 emissions per MWh decreased by 65% and 7.3% respectively while the rate of CO emission increased with inlet air cooling by 12.1%. Thus inlet air cooling offers improved thermodynamic output, increased return on investment and greater environmental sustainability.
Absorption Refrigeration, Combined Cycle Power Plant, Techno-economic Analysis, Environmental Impact Analysis, Psychrometric Processes, Waste Heat Utilization
[01] T. K. Ibrahim and M. N. Mohammed, “Thermodynamic Evaluation of the Performance of a Combined Cycle Power Plant,” Int. J. Energy Sci. Eng., vol. 1, no. 2, pp. 60-70, 2015.
[02] T. k Ibrahim, K. M. Mohammed, O. I. Awad, M. M. Rahman, G. Najafi, F. Basrawi, A. N. Abd Alla, and R. Mamat, “The optimum performance of the combined cycle power plant : A comprehensive review,” Renew. Sustain. Energy Rev., vol. 79, pp. 459-474, 2017.
[03] Z. Aminov, N. Nakagoshi, T. D. Xuan, O. Higashi, and K. Alikulov, “Evaluation of the energy efficiency of combined cycle gas turbine. Case study of Tashkent thermal power plant, Uzbekistan,” Appl. Therm. Eng., no. 103, pp. 501-509, 2016.
[04] C. Chuang and D. Sue, “Performance effects of combined cycle power plant with variable condenser pressure and loading,” Energy, vol. 30, pp. 1793-1801, 2005.
[05] J. G. Bustamante, A. S. Rattner, and S. Garimella, “Achieving near-water-cooled power plant performance with air-cooled condensers,” Appl. Therm. Eng., pp. 1-10, 2015.
[06] A. M. Al-ibrahim and A. Varnham, “A review of inlet air-cooling technologies for enhancing the performance of combustion turbines in Saudi Arabia,” Appl. Therm. Eng., vol. 30, no. 14-15, pp. 1879-1888, 2010.
[07] G. M. Zaki, R. K. Jassim, and M. M. Alhazmy, “Energy, Exergy and Thermoeconomics Analysis of Water Chiller Cooler for Gas Turbines Intake Air Cooling,” Smart Grid Renew. Energy, vol. 2, pp. 190-205, 2011.
[08] R. Hosseini, A. Beshkani, and M. Soltani, “Performance improvement of gas turbines of Fars (Iran) combined cycle power plant by intake air cooling using a media evaporative cooler,” Energy Convers. Manag., vol. 48, pp. 1055-1064, 2007.
[09] O. K. Singh, “Performance enhancement of combined cycle power plant using inlet air cooling by exhaust heat operated ammonia-water absorption refrigeration system,” Appl. Energy, vol. 180, pp. 867-879, 2016.
[10] M. Ameri and S... Hejazi, “The study of capacity enhancement of the Chabahar gas turbine installation using an absorption chiller,” Appl. Therm. Eng., vol. 24, pp. 59-68, 2004.
[11] M. A. Ehyaei, M. Tahani, P. Ahmadi, and M. Esfandiari, “Optimization of fog inlet air cooling system for combined cycle power plants using genetic algorithm,” Appl. Therm. Eng., no. 76, pp. 449-461, 2015.
[12] B. Dawoud, Y. H. Zurigat, and J. Bortmany, “Thermodynamic assessment of power requirements and impact of different gas- turbine inlet air cooling techniques at two different locations in Oman of different gas-turbine inlet air cooling techniques at two,” Appl. Therm. Eng., vol. 25, pp. 1579-1598, 2005.
[13] G. Barigozzi, A. Perdichizzi, C. Gritti, and I. Guaiatelli, “Techno-economic analysis of gas turbine inlet air cooling for combined cycle power plant for different climatic conditions,” Appl. Therm. Eng., vol. 82, pp. 57-67, 2015.
[14] Y. S. H. Najjar and A. Abubaker, “Indirect Evaporative Combined Inlet Air Cooling With Gas Turbines as a Greening Technology,” Int. J. Refrig., vol. 59, no. 2015, pp. 235-250, 2015.
[15] M. M. Alhazmy and Y. S. H. Najjar, “Augmentation of gas turbine performance using air coolers,” Appl. Therm. Eng., vol. 24, pp. 415-429, 2004.
[16] S. Boonnasa, P. Namprakai, and T. Muangnapoh, “Performance improvement of the combined cycle power plant by intake air cooling using an absorption chiller,” Energy, vol. 31, no. 12, pp. 1700-1710, 2006.
[17] A. K. Mohapatra, “Thermodynamic assessment of impact of inlet air cooling techniques on gas turbine and combined cycle performance,” Energy, no. 68, pp. 191-203, 2014.
[18] L. Yang, H. Tan, X. Du, and Y. Yang, “Thermal- flow characteristics of the new wave- finned flat tube bundles in air-cooled condensers,” Int. J. Therm. Sci., vol. 53, pp. 166-174, 2012.
[19] A. R. V Ramani, B. A. Paul, and D. A. D. Saparia, “Performance Characteristics of an Air-Cooled Condenser Under Ambient Conditions,” in International Conference on Current Trends in Technology ‘NUiCONE – 2011, 2011, pp. 382-481.
[20] V. Gadhamshetty, N. Nirmalakhandan, M. Myint, and C. Ricketts, “Improving Air-Cooled Condenser Performance in Combined Cycle Power Plants,” J. Eng. Energy, vol. 132, no. 2, pp. 81-88, 2006.
[21] N. Nirmalakhandan, V. Gadhamshetty, and A. Mummaneni, “Improving Combined Cycle Power Plant Performance,” in 6th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, 2008, no. MN1, pp. 1-6.
[22] A. Ataei, M. H. Panjeshahi, and M. Gharaie, “Performance evaluation of counter-flow wet cooling towers using exergetic analysis,” Trans. CSME/de la SCGM, vol. 32, no. 3-4, pp. 499-512, 2008.
[23] C. O. C. Oko and O. B. Ogoloma, “Generation of a typical meteorological year,” J. Eng. Sci. Technol., vol. 6, no. 2, pp. 204-214, 2011.
[24] S. O. Oyedepo, R. O. Fagbenle, S. S. Adefila, and M. Alam, “Thermoeconomic and thermoenvironomic modeling and analysis of selected gas turbine power plants in Nigeria,” Energy Sci. Eng., vol. 3, no. 5, pp. 423-442, 2015.
[25] A. G. Memon, K. Harijan, M. A. Uqaili, and R. A. Memon, “Thermo-environmental and economic analysis of simple and regenerative gas turbine cycles with regression modeling and optimization,” Energy Convers. Manag., vol. 76, pp. 852-864, 2013.
[26] P. Ahmadi, I. Dincer, and M. A. Rosen, “Exergy, exergoeconomic and environmental analyses and evolutionary algorithm based multi-objective optimization of combined cycle power plants,” Energy, vol. 36, pp. 5886-5898, 2011.
[27] P. K. Nag, Power Plant Engineering, 3rd ed. New Delhi: Tata McGraw Hill Education, 2013.
[28] A. K. Tiwari, M. M. Hasan, and M. Islam, “Exergy Analysis of Combined Cycle Power Plant : NTPC Dadri, India,” Int. J. Thermodyn., vol. 16, no. 1, pp. 36-42, 2013.
[29] T. K. Ibrahim and M. M. Rahman, “Effect of Compression Ratio on Performance of Combined Cycle Gas Turbine,” Int. J. Energy Eng., vol. 2, no. 1, pp. 9-14, 2012.
[30] M. T. Mansouri, P. Ahmadi, A. Ganjeh, and M. N. M. Jaafar, “Exergetic and economic evaluation of the effect of HRSG configurations on the performance of combined cycle power plants,” Energy Convers. Manag., vol. 58, pp. 47-58, 2012.
[31] P. Ahmadi and I. Dincer, “Thermodynamic analysis and thermoeconomic optimization of a dual pressure combined cycle power plant with a supplementary firing unit,” Energy Convers. Manag., vol. 52, no. 5, pp. 2296-2308, 2011.
[32] A. G. Kaviri, M. N. M. Jaafar, and T. M. Lazim, “Modeling and multi-objective exergy based optimization of a combined cycle power plant using a genetic algorithm,” Energy Convers. Manag., vol. 58, pp. 94-103, 2012.
[33] Y.. Cengel and M. A. Boles, Thermodynamics: An Engineering Approach, 7th ed. New York: McGraw-Hill Publishing Company, 2011.
[34] A. O. Donovan and R. Grimes, “A theoretical and experimental investigation into the thermodynamic performance of a 50 MW power plant with a novel modular air-cooled condenser,” Appl. Therm. Eng., vol. 71, no. 1, pp. 119-129, 2014.
[35] I. Dinçer, M. Rosen, and P. Ahmadi, Optimization of Energy Systems. UK: Wiley, 2018.
[36] I. Dincer and T. Ratlamwala, Integrated Absorption Refrigeration Systems. Switzerland: Springer, 2016.
[37] S. Popli, P. Rodgers, and V. Eveloy, “Gas turbine efficiency enhancement using waste heat powered absorption chillers in the oil and gas industry,” Appl. Therm. Eng., vol. 50, no. 1, pp. 918-931, 2013.
[38] R. Touaibi, M. Feidt, E. E. Vasilescu, and M. Tahar Abbes, “Parametric study and exergy analysis of solar water- lithium bromide absorption cooling system,” Int. J. Exergy, vol. x, no. x, pp. 1-16, 2013.
[39] S. C. Kaushik and A. Arora, “Energy and exergy analysis of single effect and series flow double effect water – lithium bromide absorption refrigeration systems,” Int. J. Refrig., vol. 32, no. 6, pp. 1247-1258, 2009.
[40] K. Muhsin and O. Kaynakli, “Second law-based thermodynamic analysis of water-lithium bromide absorption refrigeration system,” Energy, vol. 32, pp. 1505-1512, 2007.
[41] C. O. C. Oko and E. O. Diemuodeke, “Analysis of air-conditioning and drying processes using spreadsheet add-in for psychrometric data,” J. Eng. Sci. Technol. Rev., vol. 3, no. 1, pp. 7-13, 2010.
[42] V. L. Le, A. Kheiri, M. Feidt, and S. Pelloux-prayer, “Thermodynamic and economic optimizations of a waste heat to power plant driven by a subcritical ORC (Organic Rankine Cycle) using pure or zeotropic working fluid,” Energy, vol. 78, pp. 622-638, 2014.
[43] G.. Tiwari and R.. Mishra, Advanced Renewable Energy Sources. Cambridge: RSC Publishing, 2012.
[44] C. O. C. Oko, E. O. Diemuodeke, N. F. Omunakwe, and E. Nnamdi, “Design and Economic Analysis of a Photovoltaic System : A Case Study,” Int. J. Renew. Energy Dev., vol. 1, no. 3, pp. 65-73, 2012.
[45] B. Tchanche, S. Quoilin, S. Declaye, G. Papadakis, and V. Lemort, “Economic Feasibility Study of a Small Scale Organic Rankine Cycle System in Waste Heat Recovery Application,” in Proceedings of the ASME 2010 10th Biennial Conference on Engineering Systems Design and Analysis ESDA 2010, 2010, no. July 12-14, pp. 1-9.
[46] D. Walraven, B. Laenen, and W. D’haeseleer, “Economic system optimization of air-cooled organic Rankine cycles powered by low- temperature geothermal heat sources,” Energy, vol. 80, pp. 104-113, 2015.
[47] N. K. Rizk and H. C. Mongia, “Semianalytical Correlations for NOx, CO, and UHC Emissions,” Am. Soc. Mech. Eng., vol. 92, pp. 1-8, 1992.
[48] A. Ã. Lazzaretto and A. Toffolo, “Energy, economy and environment as objectives in multi-criterion optimization of thermal systems design,” Energy, vol. 29, pp. 1139-1157, 2004.
[49] P. Ahmadi and I. Dincer, “Thermodynamic and exergoenvironmental analyses, and multi-objective optimization of a gas turbine power plant,” Appl. Therm. Eng., vol. 31, no. 14–15, pp. 2529-2540, 2011.
[50] M. A. Ehyaei, S. Hakimzadeh, N. Enadi, and P. Ahmadi, “Exergy, economic and environment (3E) analysis of absorption chiller inlet air cooler used in gas turbine power plants,” Int. J. energy Res., vol. 36, pp. 486-498, 2012.
[51] A. Ganjehkaviri, M. N. M. Jaafar, P. Ahmadi, and H. Barzegaravval, “Modelling and optimization of combined cycle power plant based on exergoeconomic and environmental analyses,” Appl. Therm. Eng., vol. 67, no. 1-2, pp. 566-578, 2014.
[52] A. Ganjehkaviri, M. N. M. Jaafar, and S. E. Hosseini, “Optimization and the effect of steam turbine outlet quality on the output power of a combined cycle power plant,” Energy Convers. Manag., vol. 89, pp. 231-243, 2015.
[53] P. Ahmadi, I. Dincer, and M. A. Rosen, “Thermodynamic modeling and multi-objective evolutionary-based optimization of a new multigeneration energy system,” Energy Convers. Manag. J., vol. 76, pp. 282-300, 2013.
[54] Afam VI Combined Cycle Gas Turbine Plant (CCGT), “Plant operations report,” Afam, Nigeria, 2015.
[55] H. I.. Saravanamuttoo, H. Cohen, and G. F.. Rogers, Gas Turbine Theory, 4th ed. London: Longman, 1996.
[56] WECC, “Capital Cost Review of Power Generation Technologies: Recommendations for WECC’s 10- and 20-Year Studies,” Salt Lake City, 2014.
[57] U.S. Energy Information Administration, “Updated Capital Cost Estimates for Utility Scale Electricity Generating Plants,” Washington DC, 2013.
[58] Energy Innovators Initiative, “Choosing a High-Efficiency Chiller System,” Ottawa, 2009.
[59] G. Mohan, S. Dahal, U. Kumar, A. Martin, and H. Kayal, “Development of Natural Gas Fired Combined Cycle Plant for Tri-Generation of Power, Cooling and Clean Water Using Waste Heat Recovery: Techno-Economic Analysis,” energies, vol. 7, pp. 6358-6381, 2014.
[60] Trading Economics, “Nigeria Interest Rate 2007-2016 | Data | Chart | Calendar | Forecast,” Accessed 11-08-2016, 2016.
[61] J. Kotowicz, M. Job, and M. Brze, “The characteristics of ultramodern combined cycle power plants,” Energy, pp. 1-15, 2015.
[62] District Energy, “Cooling service rates 2016,” District Energy St. Paul, 2016..
[63] CSL Stockbrokers, “Nigerian Power Sector,” London, 2014.
[64] M. Jonsson and J. Yan, “Humidified gas turbines — a review of proposed and implemented cycles,” Energy, vol. 30, pp. 1013-1078, 2005.
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