Publisher : The Korean Society for Noise and Vibration Engineering
DOI : 10.5050/KSNVE.2016.26.3.248
Title & Authors
Identification of Damping Characteristics of Free-piston Stirling Engines via Nonlinear Dynamic Model Predictions Sim, Kyuho; Kim, Dong-Jun;
Recently, researches on the free-piston Stirling engines(FPSEs) are actively investigated. FPSEs have merits in its light weight, simple structure, and little need for maintenance, thus becoming a promising solution for the power conversion of renewable energy and waste heat recycle. This paper presents the methodology that estimates damping coefficients using analytical models of linear and nonlinear dynamics for FPSEs, and validates the methodology by comparing with existing experimental results. The analysis model predicts an operable range of linear damping coefficients forming limit cycles by using the root locus, and time responses obtained by numerical integration determines nonlinear damping coefficients. The model predictions are compared with experimental results of the well-known FPSE B-10B. We also investigate the damping characteristics regarding heater temperatures and power piston motions.
Jang, S. J., Sim, K. H. and Lee, Y. P., 2013, Analyses on Working Frequency of A γ-type Free-piston Stirling Engine, Transactions of the Korean Society for Noise and Vibration Engineering, Vol. 23, No. 7, pp. 654~661.
Entchev, E., Gusdorf, J., Swinton, M., Bell, M., Szadkowski, F., Kalbfleisch, W. and Marchand, R., 2004, Micro-generation Technology Assessment for Housing Technology, Energy and Buildings, Vol. 36, No. 9, pp. 925~931
http://www.kdnavien.co.kr/HeaderData/2013_Navien_promo_brochure.pdf, accessed on 2016. 01. 10.
Hong, Y. J., Ko, J. S., Kim, H. B. and Park, S. J., 2011, Design and Fabrication of 1 kW Class Stirling Engine, Proceedings of the KSME Annual Spring Conference, pp. 334~346.
Beale, W. T., 1969, Free-piston Stirling Engines - Some Model Tests and Simulations, SAE Paper No. 690230.
Gordon, L. B., 1992, Loss Terms in Free-piston Stirling Engine Models, NASA Lewis Research Center.
Joe, Y. G., Shin, K. S., LEE, Y. Y. and Oh, J. U., 2002, The Effects of Damping on the Limit Cycle of a 2-dof Friction Induced Self-oscillation System, Transactions of the Korean Society for Noise and Vibration Engineering, Vol. 12, No. 7, pp. 502~509.
Benvenuto, G., Monte, D. F. and Farina, F., 1990, Dynamic Behaviour Prediction of Free-piston Stirling Engines, Proceedings of 25th IECEC, Vol. 5, pp. 346~351.
Ulusoy, N., 1994, Dynamic Analysis of Free Piston Stirling Engines, PhD's Thesis, Department of Mechanical and Aerospace Engineering, Case Western Reserve University.
Saturno, M. G. J., 1994, Some Mathematical Models to Describe the Dynamic Behavior of the B-10 Free-piston Stirling Engine, Master's Thesis, Russ College of Engineering and Technology, Ohio University.
Karabulut, H., 2011, Dynamic Analysis of a Free Piston Stirling Engine Working with Closed and Open Thermodynamic Cycles, Renewable Energy, Vol. 36, pp. 1704~1709.
Urieli, I. and Berchowitz, D. M., 1984, Stirling Cycle Engine Analysis, Adam Hilger Ltd.
Riofrio, J. A., Al-Dakkan, K., Hofacker, M. K. and Barth, E. J., 2008, Control-based Design of Free-piston Stiling Engine, Proceedings of 2008 American Control Conference, WeC09.4, pp. 1533~1538.
Sim, K. H. and Kim, D. J., 2015, Dynamic Model Prediction and Validation for Free-piston Stirling Engines Considering Nonlinear Load Damping, Trans. Korean Soc. of Mech. Eng. A, Vol. 39, No. 10, pp. 985~993.