Browse > Article
http://dx.doi.org/10.3795/KSME-B.2017.41.4.293

Research on Development of Turbo-generator with Partial Admission Nozzle for Supercritical CO2 Power Generation  

Cho, Junhyun (Thermal Energy System Laboratory, Korea Institute of Energy Research (KIER))
Shin, Hyung-ki (Thermal Energy System Laboratory, Korea Institute of Energy Research (KIER))
Kang, Young-Seok (Engine Component Research Team, Korea Aerospace Research Institute (KARI))
Kim, Byunghui (InGineers Ltd.)
Lee, Gilbong (Thermal Energy System Laboratory, Korea Institute of Energy Research (KIER))
Baik, Young-Jin (Thermal Energy System Laboratory, Korea Institute of Energy Research (KIER))
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.41, no.4, 2017 , pp. 293-301 More about this Journal
Abstract
A Sub-kWe small-scale experimental test loop was manufactured to investigate characteristics of the supercritical carbon dioxide power cycle. A high-speed turbo-generator was also designed and manufactured. The designed rotational speed of this turbo-generator was 200,000 rpm. Because of the low expansion ratio through the turbine and low mass flowrate, the rotational speed of the turbo-generator was high. Therefore, it was difficult to select the rotating parts and design the turbine wheel, axial force balance and rotor dynamics in the lab-scale experimental test loop. Using only one channel of the nozzle, the partial admission method was adapted to reduce the rotational speed of the rotor. This was the world's first approach to the supercritical carbon dioxide turbo-generator. A cold-run test using nitrogen gas under an atmospheric condition was conducted to observe the effect of the partial admission nozzle on the rotor dynamics. The vibration level of the rotor was obtained using a gap sensor, and the results showed that the effect of the partial admission nozzle on the rotor dynamics was allowable.
Keywords
Supercritical Carbon Dioxide; Turbo-generator; Partial Admission;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Wright, S. A., Radel, R. F., Vernon, M. E., Rochau, G. E. and Pickard P. S., 2010, Operation and Analysis of a Supercritical $CO_2$ Brayton Cycle, Sandia National Laboratories, Available at: (accessed in Jan. 2016) http://prod.sandia.gov/techlib/access-control.cgi/2010/100171.pdf
2 Convoy, T., Pasch, J. and Fleming, D., 2013, "Control of a Supercritical $CO_2$ Recompression Brayton Cycle Demonstration Loop," ASME Journal of Engineering for Gas Turbines and Power, Vol. 135, 111701.   DOI
3 Clementoni, E., Cox, T. and King, M., 2016, "Steadystate Power Operation of a Supercritical Carbon Dioxide Brayton Cycle with Thermal-hydraulic Control," ASME TurboEXPO 2016, GT2016-56038.
4 Musgrove, G., Rimpel, A. M. and Wilkes, J. C., 2015, "Fundamentals of Supercritical $CO_2$," ASME TurboEXPO 2015.
5 http://www.echogen.com
6 Cho, J., Choi, M., Baik, Y-J., Lee, G., Ra, H-S., Kim B. and Kim, M., 2016, "Development of the Turbomachinery for the Supercritical Carbon Dioxide Power Cycle," International Journal of Energy Research, Vol. 40, No. 5, pp 587-599.   DOI
7 Cho, J., Shin, H., Ra, H-S., Lee, G., Roh, C., Lee, B. and Baik, Y.-J., 2016, "Development of the Supercritical Carbon Dioxide Power Cycle Experimental Loop in KIER," ASME TurboEXPO 2016, GT2016-57460.
8 Balje, O. E., 1981, "Turbomachines: A Guide to Design, Selection and Theory," John Wiley & Sons Inc.