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Electronic Resource
Call number
Publication
DOE NASA 0069 79 1; Report; January 1980.
Language
Library's review
ABSTRACT:
This is the final report for the Concept Definition Study of Small Brayton Cycle Engines for Dispersed Solar Electric Power Systems, NASA Contract DEN3-69. This study addressed three first-generation Brayton cycle engine types for solar application: a near-term open cycle (Configuration
The existing AiResearch GTP36-51 turbocompressor and a 400-Hz generator, both suitably modified, were selected for Configuration A. The existing AiResearch PFE turbocompressor and a 400-Hz generator were selected for Configuration B. Configuration c utilizes a turbocompressor also, based on the GTP36-51 aerodynamics, but scaled to an optimum flow and mounted on gas bearings, together with a permanent magnet generator.
For a thermal input of 72. 7 kWt to the engine, Configuration C has an efficiency of 31.4 percent at the engine shaft and will generate 19.l kWe (net) at the 60-Hz busbar with an overall efficiency of 26.3 percent o~ a sea level, 80°F day. Initial high-production rate and maintenance costs also w~re estimated.
This is the final report for the Concept Definition Study of Small Brayton Cycle Engines for Dispersed Solar Electric Power Systems, NASA Contract DEN3-69. This study addressed three first-generation Brayton cycle engine types for solar application: a near-term open cycle (Configuration
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A), a near-term closed cycle (Configuration B), and a longer-term open cycle (Configuration C).The existing AiResearch GTP36-51 turbocompressor and a 400-Hz generator, both suitably modified, were selected for Configuration A. The existing AiResearch PFE turbocompressor and a 400-Hz generator were selected for Configuration B. Configuration c utilizes a turbocompressor also, based on the GTP36-51 aerodynamics, but scaled to an optimum flow and mounted on gas bearings, together with a permanent magnet generator.
For a thermal input of 72. 7 kWt to the engine, Configuration C has an efficiency of 31.4 percent at the engine shaft and will generate 19.l kWe (net) at the 60-Hz busbar with an overall efficiency of 26.3 percent o~ a sea level, 80°F day. Initial high-production rate and maintenance costs also w~re estimated.
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