Startup and Operation of a Supercritical Carbon Dioxide Brayton Cycle

Author:

Clementoni Eric M.1,Cox Timothy L.1,Sprague Christopher P.1

Affiliation:

1. Bechtel Marine Propulsion Corporation, West Mifflin, PA 15122 e-mail:

Abstract

Bechtel Marine Propulsion Corporation (BMPC) is testing a supercritical carbon dioxide (S-CO2) Brayton system at the Bettis Atomic Power Laboratory. The 100 kWe integrated system test (IST) is a two shaft recuperated closed Brayton cycle with a variable speed turbine driven compressor and a constant speed turbine driven generator using S-CO2 as the working fluid. The IST was designed to demonstrate operational, control, and performance characteristics of an S-CO2 Brayton power cycle over a wide range of conditions. Initial operation of the IST has proven a reliable method for startup of the Brayton loop and heatup to normal operating temperature (570 °F). An overview of the startup process, including initial loop fill and charging, and heatup to normal operating temperature is presented. Additionally, aspects of the IST startup process which are related to the loop size and component design which may be different for larger systems are discussed.

Publisher

ASME International

Subject

Mechanical Engineering,Energy Engineering and Power Technology,Aerospace Engineering,Fuel Technology,Nuclear Energy and Engineering

Reference5 articles.

1. Ashcroft, J. A., Kimball, K. J., and Corcoran, M. R., 2009, “Overview of Naval Reactors Program Development of the Supercritical Carbon Dioxide Brayton System,” Supercritical CO2 Power Cycle Symposium, Troy, NY, April 29–30.

2. Kimball, K. J., 2011, “Overview of Naval Reactors Program Development of the Supercritical Carbon Dioxide Brayton System,” Supercritical CO2 Power Cycle Symposium, Boulder, CO, May 24–25.

3. Kimball, K. J., and Clementoni, E. M., 2012, “Supercritical Carbon Dioxide Brayton Power Cycle Development Overview,” ASME Turbo Expo 2012, Copenhagen, Denmark, June 11–15, ASME Paper No. GT2012-68204.10.1115/GT2012-68204

4. Hexemer, M. J., Hoang, H. T., Rahner, K. D., Siebert, B., and Wahl, G. D., 2009, “Integrated Systems Test (IST) S-CO2 Brayton Loop Transient Model Description and Initial Results,” Supercritical CO2 Power Cycle Symposium, Troy, NY, April 29–30.

5. Hexemer, M. J., 2011, “Supercritical CO2 Brayton Cycle Integrated System Test (IST) TRACE Model and Control System Design,” Supercritical CO2 Power Cycle Symposium, Boulder, CO, May 24–25.

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