Performance Analysis of a Gas Turbine Cycle Equipped with a Double Acting Type Stirling Engine in a Power Generating Unit

Authors

Abstract

The aim of this study is to investigate the performance of a gas turbine cycle equipped with a Stirling engine from the thermodynamic point of view. In this system, a part of the heat loss from the gas turbine is transmitted to a Stirling engine to generate more power. In the analysis of the proposed system, the governing equations of the hybrid cycles are modeled in MATLAB software and Schmidt, and ideal adiabatic models are used to solve the Stirling engine. In the analysis of the hybrid cycle, the compressor pressure ratio and turbine inlet temperature are considered as two Important and effective parameters. The results show that reducing the compressor pressure ratio and increasing the turbine inlet temperature improve the performance of the Stirling engine. The results indicate that the use of the hybrid gas turbine cycle and the Stirling engine will increase the power of the gas turbine from 268 kW to 468/6 kW, based on the Schmidt model, and 457/3 kW, based on the ideal adiabatic model. Also, the electrical efficiency of the system increases by 18/1%, based on the Schmidt model, and about 17/1%, based on the ideal adiabatic model.

Keywords


[1] Mattingly, J.D., Elements of Propulsion: Gas Turbines and Rockets. Reston, Virginia, USA: American Institute of Aeronautics and Astronautics, 2006. [2] Poullikkas, A., "An Overview of Current and Future Sustainable Gas Turbine Technologies", Renewable & Sustainable Energy Reviews, Vol. 9, No. 5, pp. 409-443, 2005. [3] Milewski, J., Badyda, K. and Miller, A., Gas Turbines in Unconventional Applications, Efficiency, Performance and Robustness of Gas Turbines, Dr. Volkov Konstantin (Ed.), ISBN: 978-953-51- 0464-3, 2012. [4] Schmidt, G., The Theory of Lehmann’s Calorimetric Machine, Z., Vereines Deutcher Ingenieure, 15, part 1, 1871. [5] Finkellstein, T., Analogue Simulation of Stirling Engine, No. 2, 1975. [6] Urieli, I., Berchowitz, D.M., Stirling Cycle Engine Analysis, Oxford, Oxford University Press, 1984. [7] Kongtragool, B., Wongwises, S., "A Review of Solar Powered Stirling Engines and Low Temperature Differential Stirling Engines", Renewable and Sustainable Energy Reviews, Vol. 7, pp. 131-154, 2003. [8] Timoumi, Y., Nasrallah, S.B. and Tlili, I., "Numerical Simulation and Losses Analysis in a Stirling Engine", Heat and Thechnology, Vol. 24, No. 1, pp. 97-105, 2006. [9] Timoumi, Y., Tlili, I., Nasrallah, S. B., "Reduction of Energy Losses in a Stirling Engine", Heat and Thechnology, Vol. 25, No. 1, pp. 81-90, 2007. [10] Timoumi, Y., Nasrallah, S. B. and Tlili, I., "Thermodynamic Analysis of the Stirling Heat Engine with Regenerative Losses and Internal Irreversibilities", Engine Res, Vol. 9, pp. 45-56, 2007. [11] Timoumi, Y., Tlili, I. and Nasrallah, S.B., "Design and Performance Optimization of GPU-3 Stirling Engines", Energy, Vol. 33, pp. 1100-1114, 2008. [12] Korlu, M., Pirkandi, J. and Maroufi, A., "Thermodynamic Analysis of a Gas Turbine Cycle Equipped with a Non-ideal Adiabatic Model for a Double Acting Stirling Engine", Energy Conversion and Managment, Vol. 147, pp. 120-134, 2017. [13] Thombare, D.G. and Verma, S.K., "Technological Development in the Stirling Cycle Engines", Renewable and Sustainable Energy Reviews, Vol. 12, pp. 1-38, 2008. [14] Chahartaghi, M. and Sheykhi, M., "Energy and Exergy Analyses of Beta-type Stirling Engine at Different Working Conditions, Vol. 169, pp. 279-290, 2018. [15] Entezari, A., Manizadeh, A., andAhmadi, R., "Energetical, Exergetical and Economical Optimization Analysis of Combined Power Generation System of Gas Turbine and Stirling Engine, Vol. 159, pp. 189-203, 2018. ]16[ مصطفوی، سید علیرضا، شیرازی، محمد، «احتراق ذرات سوخت زیست‌توده در یک واحد تولید همزمان توان و حرارت مقیاس کوچک»، نشریه علمی و پژوهشی مهندسی و مدیریت انرژی، جلد 6، شمارۀ 3، صفحۀ 56ـ63، ۱۳۹۵. [17] Haseli, Y., Dincer, I. and Naterer, G.F., "Thermodynamic Modeling of a Gas Turbine Cycle Combined with a Solid Oxide Fuel Cell", Hydrogen Energy Vol. 33, pp. 5811-5822, 2008. [18] Abete, A. J., Testing and Optimization of the Performance of a Stirling Engine, Master. Thesis, College Osnabrück, 2013. [19] Walker, G., Stirling Engines, Oxford University Press, Oxford, 1980. [20] Malroy, E.T., Solution of the Ideal Adiabatic Stirling Model with Coupled First Order Differential Equations by the Pasic Method, Maters. Thesis, Ohio University, College of Engineering and Technology, 1998.