한국유체기계학회 논문집 (The KSFM Journal of Fluid Machinery)

한국유체기계학회 (Korean Society for Fluid machinery)
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500W급 마이크로 가스터빈 발전기 회전체-베어링부의 단열 및 냉각 성능에 대한 실험적 연구

Experimental Study on Thermal Insulation and Cooling for Rotor/Bearing Area in 500W Class Micro Gas Turbine Generator

  • 박철훈 (한국기계연구원 첨단생산장비 연구본부) ;
  • 최상규 (한국기계연구원 첨단생산장비 연구본부) ;
  • 함상용 (한국기계연구원 첨단생산장비 연구본부)
  • 투고 : 2014.02.27
  • 심사 : 2014.05.08
  • 발행 : 2014.06.01
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초록

Development of long-term mobile energy sources for mobile robots or small-sized unmanned vehicles are actively increasing. The micro gas turbine generator (MTG) is a good candidate for this purpose because it has both of high energy density and high power density, and 500W class MTG is under development. The designed MTG can be divided into 2 main parts. One part consists of motor/ generator and compressor, and the other one consists of combustor, recuperator and turbine. 500W class MTG is designed to operate at ultra-high speed of 400,000 rpm in high turbine temperature over $700^{\circ}C$ to improve the efficiency. Because the magnetism of NdFeB permanent magnet for the motor/generator could be degraded if the temperature is over $150-200^{\circ}C$, MTG needs the thermal insulation to block the heat transfer from combustor/turbine side to motor/generator side. Moreover, the motor/generator is allocated to get the cooling effect from the rapid air flow by the compressor. This study presents the experimental results to verify whether the thermal insulator and air flow are effective enough to keep the motor/generator part in the low temperature less than $100^{\circ}C$. From the motoring test by using the high temperature test rig, it was confirmed that the motor/generator part could maintain the temperature less than $50^{\circ}C$ under the condition of 1.0 bar compressed air.

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참고문헌

  1. Peirs, J., Waumans, T., Liu, K., Ferraris, E., Verstraete, T., Van den Braembussche, R., and Reynaerts, D., 2009, "Experimental verification of compressor performance for an ultra-microgasturbine," Proc. the 9th International Workshop on Micro and Nanotechnology for Power Generation and Energy Conversion Applications, pp. 92-95.
  2. Han, S. J., Seo, J. M, Park, J. Y. Choi, B. S. and Do, K. H., 2010, "Design and simulation of 500W ultra-micro gas turbine generator", Proc. PowerMEMS, Leuven, pp. 247-250.
  3. Park, C. H., Choi, S. K. and Ham, S. Y., 2011, "Design and experiment of 400,000 rpm high speed rotor and bearings for 500W class micro gas turbine generator," Proc. PowerMEMS, Daejeon, pp. 1-4.
  4. Seo, J. M., Park, J. Y., Choi, B. S. and Park, M. R., 2012, "Performance evaluation of compressor to develop 500W class ultra-micro gas turbine," Journal of Fluid Machinery, Vol. 15, pp. 51-57. https://doi.org/10.5293/kfma.2012.15.6.051
  5. Seo, J. M., Park, J. Y. and Choi, B. S., 2013, "Start-up and Self-sustain test of 500W ultra-micro gas turbine generator," Proc. PowerMEMS, London, pp. 1-5.
  6. Park, C. H,. Choi, S. K., Hong, D. E., Yoon, T. G. and Lee, S. H., 2013 "Identification of dynamic coefficients of metal mesh damper foil bearings for 400,000 rpm class high speed rotor," Proc. 11th international symposium of measurement technology and intelligent instruments, Achen, pp. 1-2.
  7. Park, C. H., Choi, S. K., Hong, D. E., Yoon, T. G. and Lee, S. H., 2013 "Note: Radial-thrust combo metal mesh foil bearing for microturbomachinery," Review of Scientific Instrument, Vol. 84, No. 10, pp. 106102-1-106102-3. https://doi.org/10.1063/1.4825037
  8. San Andres, L., Chirathadam, T. A., and Kim, T. H., 2010, "Measurement of structural stiffness and damping coefficients in a metal mesh foil bearing." Journal of Engineering for Gas Turbines and Power, Vol. 132, No.3, pp. 032503. https://doi.org/10.1115/1.3159379
  9. San Andres, L., and Chirathadam, T. A., 2011, "Identification of Rotordynamic Force Coefficients of a Metal Mesh Foil Bearing Using Impact Load Excitations," Journal of Engineering for Gas Turbines and Power, Vol. 133, No. 11, pp. 112501. https://doi.org/10.1115/1.4002658
  10. San Andres, L., and Chirathadam, T. A., 2011, "Metal mesh foil bearing: Effect of motion amplitude, rotor speed, static load, and excitation frequency on force coefficients," Journal of Engineering for Gas Turbines and Power, Vol. 133, No. 12, pp. 122503. https://doi.org/10.1115/1.4004112
  11. Lee, Y. B., Kim, T. Y., Kim, C. H., and Kim, T. H., 2012, "Effects of Mesh Density on Static Load Performance of Metal Mesh Gas Foil Bearings," Journal of Engineering for Gas Turbines and Power, pp. 134, No. 1, pp. 012502. https://doi.org/10.1115/1.4004142
  12. Park, J. S., Kim, S., Choi, B. S. and Cho, H. H., 2013 "Effect of the thermal insulation on generator and micro gas turbine system," Energy, Vol. 59, pp. 581-589. https://doi.org/10.1016/j.energy.2013.07.019

피인용 문헌

  1. 2014년 가스·스팀터빈 분야 연구동향 vol.18, pp.2, 2014, https://doi.org/10.5293/kfma.2015.18.2.082
  2. 2014년 회전체동역학 분야 연구동향 vol.18, pp.2, 2015, https://doi.org/10.5293/kfma.2015.18.2.089