Commenced in January 2007
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System Identification and Performance Improvement to a Micro Gas Turbine Applying Biogas

Authors: Chun Hsiang Yang, Cheng Chia Lee, Chiun Hsun Chen

Abstract:

In this study, the effects of biogas fuels on the performance of an annular micro gas turbine (MGT) were assessed experimentally and numerically. In the experiments, the proposed MGT system was operated successfully under each test condition; minimum composition to the fuel with the biogas was roughly 50% CH4 with 50% CO2. The power output was around 170W at 85,000 RPM as 90% CH4 with 10% CO2 was used and 70W at 65,000 RPM as 70% CH4 with 30% CO2 was used. When a critical limit of 60% CH4 was reached, the power output was extremely low. Furthermore, the theoretical Brayton cycle efficiency and electric efficiency of the MGT were calculated as 23% and 10%, respectively. Following the experiments, the measured data helped us identify the parameters of dynamic model in numerical simulation. Additionally, a numerical analysis of re-designed combustion chamber showed that the performance of MGT could be improved by raising the temperature at turbine inlet. This study presents a novel distributed power supply system that can utilize renewable biogas. The completed micro biogas power supply system is small, low cost, easy to maintain and suited to household use.

Keywords: Micro Gas Turbine, Biogas; System Identification, Distributed power supply system

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1329492

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References:


[1] L. Li, X. F. Peng, and T. Liu, Combustion and cooling performance in an aero-engine annular combustor, Applied Thermal Engineering, Vol. 25, pp. 1171-1179, 2006.
[2] C. A Gonzalez, K. C. Wong, and S. Armfield, A computational study of the influence of the injection characteristics on micro-turbine combustion, The 16th Australasian Fluid Mechanics Conference, pp. 1148-1152, Australia, 2007.
[3] D. Yamashita, K. Kuwabara, K. Tatsumi, and K. Nakabe, Experimental evaluation on low-heating value fuel acceptability of micro gas turbine system operation, The 16th International Symposium on Transport Phenomena, pp. 1-7, Prague, 2005.
[4] W. J. Rowen, Simplified Mathematical Represmeyations of Heavy Duty Gas Turbine, Journal of Engineering Power, pp. 865-869, 1983.
[5] C. H. Yang, D. H. Wu, and C. H. Chen, Optimal Design of a Methane-used Combustor: Applying CFD Modeling, The 3rd International Green Energy Conference, Vasteras, Sweden, 2007.
[6] CFD User Manual, CFD Research Corp, 2004.