Energetic, exergetic and economic analysis of a cogeneration system: sugarcane plant of Sao Paulo case
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Abstract
In this paper a technical and economic study of a cogeneration system for a sugar plant in São Paulo is carried out. For this propose the 1st and 2nd laws of thermodynamics are applied for the technical analysis. The cost of the electrical energy and steam produced are determined in the economic analysis. In the sizing of the plant, four gas turbines are analyzed that are in thermal parity with the process. The results show that the plant has a production capacity of 148MW of electricity and 147MW of steam. On the one hand the energy analysis reveals that the efficiency of the plant is 67%, while the exergetic analysis shows that this efficiency is 56%. The results of the economic analysis indicate that the prices of electricity and steam produced are 0.105 and 0.068 US $ / kWh, respectively.
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References
[2] N. Mat Isa, C. Wei Tan, A.H.M. Yatim, “A comprehensive review of cogeneration system in a microgrid: A perspective from architecture and operating system”, in Renewable and Sustainable Energy Reviews, 2017. [Online]. Available:
http://dx.doi.org/10.1016/j.rser.2017.06.034.
[3] R. Carapellucci, A. Milazzo, “Repowering combined cycle power plants by a modified STIG configuration”, in Energy Convers Manage, vol. 48(5), pp. 1590–600, 2007.
[4] A. Rovira, C. Sánchez, M. Muñoz, M. Valdés, MD. Durán. “Thermoeconomic optimisation of heat recovery steam generators of combined cycle gas turbine power plants considering off-design operation”, in Energy Convers Manage, vol. 52(4), pp. 1840–9, 2011.
[5] D. Mahto, S. Pal, “Thermodynamics and thermo-economic analysis of simple combined cycle with inlet fogging”, in Applied Thermal Engineering, vol. 51, pp. 1359-4311, 2013.
[6] G . Heyen, B . Kalitventzeff, “A comparison of advanced thermal cycles suitable for upgrading existing power plant”, in Appl Therm Eng, vol. 19, pp. 227–37, 1999.
[7] J. L. Silveira, C. E. Tuna, “Thermoeconomic analysis method for optimization of combined heat and power systems. Part I.”, in Progress in Energy and Combustion Science, vol. 29, pp. 479-485, 2003.
[8] J. L. Silveira, C. E. Tuna, “Thermoeconomic analysis method for optimization of combined heat and power systems. Part II.”, in Progress in Energy and Combustion Science, vol. 30, pp. 673-678, 2004.
[9] M. A. Kordlar, S. M. S. Mahmoudi, “Exergeoconomic analysis and optimization of a novel cogeneration system producing power and refrigeration”, Energy Conversion and Management, vol. 134, pp. 208-220, 2017.
[10] M. Gambini, M. Vellini, “High Efficiency Cogeneration: Electricity from Cogeneration in CHP Plants”, in Energy Procedia, vol. 81, pp. 430-439, 2015.
[11] D. Gvozdenac, B. Gvozdenac Uroševi?, C. Menke, D. Uroševi?, A. Bangviwat, “High efficiency cogeneration: CHP and non-CHP energy”, in Energy, vol. 135, pp. 269-278, 2017.
[12] B. B. Kanbur, L. Xiang, S. Dubey, F. H. Choo, F. Duan, “Thermoeconomic assessment of a micro cogeneration system with LNG cold utilization”, in Energy, vol. 129, pp. 171-184, 2017.
[13] Z. Sun, “Energy efficiency and economic feasibility analysis of cogeneration system driven by gas engine”, in Energy and Buildings, vol. 40, pp. 126-130, 2008.
[14] A. Abusoglu, M. Kanoglu, “Exergetic and thermoeconomic analyses of diesel engine powered cogeneration: Part 1 – Formulations”, in Applied Thermal Engineering, vol. 29, pp. 234-241, 2009.
[15] R. Passolongo, “Avaliação Termodinâmica, Termoeconômica e Econômica da Integração de Sistemas de Gaseificação da Biomassa em uma Usina Sucroalcooleira, Master dissertation, in São Paulo State University, 2011.
[16] I. A. de Castro Villela, “Desenvolvimento de um Modelo Termo Econômico que Considera os Impactos Ambientais”, Ph.D. dissertation, in São Paulo State University, 2007.
[17] Y. A. Çengel, M. A. Boles, S. Faddeeva Sknarina, “Termodinámica”, México [etc.]: McGraw Hill, 2009.
[18] “Chemical Composition of Natural Gas - Union Gas”, [Online]. Available: https://www.uniongas.com/about-us/about-natural-gas/Chemical-Composition-of-Natural -Gas
[19] D. Sue, C. Chuang, “Engineering design and exergy analyses for combustion gas turbine based power generation system”, in Energy, vol. 29, pp. 1183-1205, 2004.
[20] “Natural Gas Calorific Value Calculator | Unitrove”, [Online]. Available: http://www.unitrove.com/engineering/tools/gas/natural-gas-calori_c-value
[21] J. L. Silveira, “Cogeração Disseminada para Pequenos Usuários: Estudo de Casos para o Setor Terciário”, Ph.D. dissertation, U Campinas, State University, 1994.
[22] “Gas Turbine World Handbook”, 2012.