Rotordynamics analysis of solar hybrid microturbine for concentrated solar power
Microturbine based on a parabolic dish solar concentrator runs at high speed and has large amplitudes of subsynchronous turbo-shaft motion due to the direct normal irradiance (DNI) fluctuation in daily operation. A detailed rotordynamics model coupled to a full fluid film radial or journal bearing model needs to be addressed for increasing performance and to ensure safe operating conditions. The present paper delivers predictions of rotor tip displacement in the microturbine rotor assembly supported by a journal bearing under non-linear vibrations. The rotor assembly operates at 72 krpm on the design speed and delivers a 40 kW power output with the turbine inlet temperature is about 950 °C. The turbo-shaft oil temperature range is between 50 °C to 90 °C. The vibrations on the tip radial compressor and turbine were presented and evaluated in the commercial software GT-Suite environment. The microturbine rotors assembly model shows good results in predicting maximum tip displacement at the rotors with respect to the frequency and time domain.
M.D.J.M. Guerrero-Lemus R., “Concentrated Solar Power,” in: Renewable Energies and CO2, Vol. 3. London: Springer-Verlag, 2013. crossref
W.S.K. Lovegrove, "Concentrating Solar Power Technology, Principles, Developments and Applications", Woodhead Publishing, 2012. crossref
M. Arifin, A. Rajani, Kusnadi, and T. D. Atmaja, “Modeling and Performance Analysis of a Parallel Solar Hybrid Micro Gas Turbine,” Proceeding - 2019 Int. Conf. Sustain. Energy Eng. Appl. Innov. Technol. Towar. Energy Resilience, ICSEEA 2019, pp. 62–68, 2019. crossref
M. Arifin, K. Kusnadi, and R. I. Pramana, “Prediction performance map of radial compressor for system simulation,” Proc. - 6th Int. Conf. Sustain. Energy Eng. Appl. ICSEEA 2018, pp. 51–56, 2019. crossref
A.I.S.A. Arroyo, M. McLorn, M. Fabian, M. White, “RotorDynamics of Different Shaft Configurations for a 6 kW Micro Gas Turbine for Concentrated Solar Power,” ASME Turbo Expo 2016 Turbomach. Tech. Conf. Expo., pp. 1–10, 2016. crossref
I. Chatzisavvas, “Efficient Thermohydrodynamic Radial and Thrust Bearing Modeling for Transient Rotor Simulations,” PhD Thesis, Darmstadt, Tech. Univ., 2018. crossref
M.I. Friswell, Dynamics of Rotating Machines. Cambridge University Press, 2015. crossref
P. Koutsovasilis, “Mode shape degeneration in linear rotor dynamics for turbocharger systems,” Arch. Appl. Mech., vol. 87, no. 3, pp. 575–592, 2017. crossref
I. Chatzisavvas, “Efficient Thrust Bearing Model for HighSpeed Rotordynamic Applications,” in Proceedings of the 9th IFToMM International Conference on Rotor Dynamics, 2015. crossref
P. Koutsovasilis, “Automotive turbocharger rotordynamics: Interaction of thrust and radial bearings in shaft motion simulation,” J. Sound Vib., vol. 455, pp. 413–429, 2019. crossref
H. Nguyen-Schäfer, Rotordynamics of Automotive Turbochargers, vol. 2. Stuttgart: Springer International Publishing AG Switzerland, 2015. crossref
Gamma Technologies, “GT-Suite, Flow and Mechanical Theory Manual,” 2019. crossref
C.U. Waldherr and D.M. Vogt, “An Extension of the Classical Subset of Nominal Modes Method for the Model Order Reduction of Gyroscopic Systems,” J. Eng. Gas Turbines Power, vol. 141, no. 5, pp. 1–8, 2019. crossref
W.J. Chen, “Rotordynamics and bearing design of turbochargers,” Mech. Syst. Signal Process., vol. 29, pp. 77–89, 2012. crossref
D. Iaria, J. Alzaili, A.I. Sayma, “Solar Dish Micro Gas Turbine Technology for Distributed Power Generation,” In Sustainable Energy Technology and Policies. Green Energy and Technology, Springer, Singapore, 2018. crossref
Metrics powered by PLOS ALM
- There are currently no refbacks.
Copyright (c) 2020 Journal of Mechatronics, Electrical Power, and Vehicular Technology
This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.