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Initial Test Results of a Dual Closed-Brayton-Cycle Power Conversion SystemThe dual Brayton power conversion system constructed for NASA Glenn Research Center (GRC) was acceptance tested April 2007 at Barber-Nichols, Inc., Arvada, Colorado. This uniquely configured conversion system is built around two modified commercial Capstone C30 microturbines and employs two closed-Brayton-cycle (CBC) converters sharing a common gas inventory and common heat source. Because both CBCs share the gas inventory, behavior of one CBC has an impact on the performance of the other CBC, especially when one CBC is standby or running at a different shaft speed. Testing performed to date includes the CBCs operating at equal and unequal shaft speeds. A test was also conducted where one CBC was capped off and the other was operated as a single CBC converter. The dual Brayton configuration generated 10.6 kWe at 75 krpm and a turbine inlet temperature of 817 K. Single Brayton operation generated 14.8 kWe at 90 krpm and a turbine inlet temperature of 925 K.
Document ID
Document Type
Conference Paper
Johnson, Paul K.
(Analex Corp. Cleveland, OH, United States)
Mason, Lee S.
(NASA Glenn Research Center Cleveland, OH, United States)
Date Acquired
August 24, 2013
Publication Date
December 1, 2007
Subject Category
Spacecraft Propulsion And Power
Report/Patent Number
Paper 2057
Meeting Information
Space Nuclear Conference 2007(Boston, MA)
Funding Number(s)
WBS: WBS 850661.04.01.03
Distribution Limits
Public Use Permitted.
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