Research on energy indexes of cogenerated plants with gas turbines and heat recuperator steam generators

  • Bienvenido Sarria López Universidad Tecnológica de Bolivar
  • Luis F. Bermúdez Valencia Biofilm S.A., Planta Cartagena.
Keywords: Energy indexes, Specific consumptions, Mathematic equations, Cogeneration, Thermal efficiency


The main objective of this paper is the experimental investigation of the energy indexes of a cogeneration plant with Gas Turbines (GT) and Heat Recuperator Steam Generators (HRSGs) while changing its operational load. The energy indicators were determined using the following International Standards and Codes: ASME PTC1, ASME PTC 22 and ASME PTC 4.4. The results of energy calculations indexes are in the form of curves. The mathematical equations of the curves corresponding to the real energy indexes are obtained applying multivariate regression.

The main research results correspond to a process plant with nominal capacity of 4800 kW. The range of lower energy consumption values obtained for the HR of the turbine are around 13000 kJ/kW·h, while for the Heat Rate of the plant is 7000 kJ/kW·h. For these values of the Heat Rate (HR), the electrical output remains in the environment of 3500 kW. It was found that the thermal efficiency of HRSGs varies from 50 to 60% with very high values of sensible heat losses in flue gases due to the operation with high excess air and high temperatures of the gases at the outlet of HRSGs. The contributions of this research are used in operational management in order to reduce fuel consumption and environmental impact on the generation of electricity and heat cogeneration plant evaluated. The results of this research in the plant have been implemented to monitor the transaction on the basis of the variation in real-time energy indexes evaluated, besides the traditional control of the parameters only, which is more effective.


ASME PTC 1-2004 (R2009). General Instructions for Power Test Code. American Society of Mechanical Engineers / 31-Dec-2004. ISBN: 0791829227.

ANSI/ASME PTC 22-1997 (R2006). Performance Test Code on Gas Turbines. American Society of Mechanical Engineers / 30-May-2006. ISBN: 0791829545.

ANSI/ASME PTC 4.4-1981 (R1992). Gas Turbine Heat Recovery Steam Generators. American Society of Mechanical Engineers / 01-jan-1981. ISBN: 9780791831397.

Balli, O., Aras, H. & Hepbasli, A. (2010). Thermodynamic and thermoeconomic analysis of a trigeneration (TRIGEN) system with a gas-diesel machine: Part II – An application. Energy Conversion and Management, 51 (11), 2260-2271.}

Baukal, C. E. (2000). Heat transfer in industrial combustion. New York: CRC Press LLC.

Bermúdez, L. F. (2010). Método para el control operacional en línea de la generación de electricidad en turbogas: Caso Biofilm S.A. planta Cartagena. Tesis de Maestría Fac. Ing. Universidad Tecnológica de Bolívar. Cartagena, Colombia, 191pp.

Boyce, M. (2002). Gas turbine engineering handbook. 2nd ed. Houston: Bristish library.

Bruno, J. Ortega, V. & Coronas, A. (2009). Integration of cooling systems into gas turbine trigeneration systems
using biogás: Case study of a sewage treatment plant. Applied Energy, 86 (6), 837-847.

Cengel, Y. A. (2008). Termodinámica. Sexta Edición. New York: McGraww-Hill Companies.

Chandok, J., Kar, I. & Tuli, S. (2008). Estimation of Furnaceexit Gas Temperature (FEGT) using optimized radial basis and back-propagation neural networks. Energy Conversion and Management, 49 (8), 1989-1998.

Coskun, C., Oktay, Z. & Ilten, N. (2009). A new approach for simplifying the calculation of flue gas specific heat and specific exergy value depending on fuel composition. Energy, 34 (11), 1898-1902.

Eicher, A. (2000). Calculation of combustion gas flow rate and residence time based on stack gas data. Waste Management, 20 (5-6), 403-407.

e2 Energía Eficiente (2003). Manual de Gestión Energética Integral. Biofilm S.A., Planta Cartagena.

Galip, T. & Durriye, B. (2004). Thermoeconomic analysis of a trigeneration system. Applied Thermal Engineering, 24 (17-18), 2689- 2699.

Ganapathy, V. (1993). Applied Heat Transfer. Tulsa: Penn Well Books Company.

Ganapathy, V. (2003). Industrial boiler and heat recovery steam generators. New York: Marcel Dekker.

Garcia, G. S. & Fraile, C. D. (2008). Cogeneración-diseño 0operación y mantenimiento de plantas. 2nd. Ed. Madrid: Diaz Santos.

Horlock, J. H. (2003). Advanced Gas Turbine cycles. UK: Elsevier Science.

IDAE, (2008). Análisis del potencial de cogeneración de alta eficiencia en España. 2010 - 2015 - 2020. Instituto para la Diversificación y el Ahorro de Energía.

Kehlhofer, R. (1997). Combined – cycle gas and steam turbine power plant. Oklahoma: Penn Well.

Kenneth, E. & Heselton, P. E. (2005). Boiler operatos handbook. New York: The Fairmont Press.

Kizniezova, N. V. (1987). Cálculo térmico de agregados de calderas. Método Normativo de la Unión Sovíetica.
Moscú: Energía.

Kyle, B. G. (1984). Chemical and process thermodynamics. Englewood Cliffs: NJ Prentice - Hall.

Pitanga, R., Hacon, D., Tessarollo, A. & Reis, J. (2010). Thermodynamic analysis of trigeneration systems taking into account refrigeration, heating and electricity load demands. Energy and Buildings, 42 (12), 2323-2330.

Sala, J. (1994). Cogeneration. Thermodynamic, technological and economic. Bilbao: Servicio Editorial Universidad del Vasco.

Santos, L. (1999). Tecnología de monitoreo, control, optimización y diagnostico operacional para el incremento
de la eficiencia energética en centrales termoeléctricas. Tesis Doctoral, Universidad de Cienfuegos, Cienfuegos, Cuba, 186 pp.

Schicktanz, M., Waple, J. & Henning, H. (2011). Primary energy and economic analysis of combined heating,
cooling and power systems. Energy, 36 (1), 575-585.

Stultz, S. C. & Kitto, J. B. (1992). Steam: Its generation and use. 40th edition. Ohio: The Babcock and Wilcox
Company, Barberton.

Teopa, E., Picón, M. & Rodríguez, M. (2005). Thermal integration of trigeneration systems. Applied Thermal
Engineering, 25 (7), 973-984

Troyanovski, B. M, Filippov, G. A. & Bulkin, A. E. (1987). Turbinas de vapor y de gas de las centrales nucleoeléctricas.Moscú: Editorial Mir.
Yrjölä, J., Paavilainen, J. & Sillanpää, M. (2006). Modeling and experimental studies on heat transfer in the convection section of a biomass boiler. Inter., J. of Enery Reser., 30 (12), 939–953.
How to Cite
Sarria López, B., & Bermúdez Valencia, L. F. (2012). Research on energy indexes of cogenerated plants with gas turbines and heat recuperator steam generators. CT&F - Ciencia, Tecnología Y Futuro, 4(5), 85-100.


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