Compact Turbo-Machinery for a Micro-Gravity-Compatible Freezer Application

Paper #:
  • 941529

Published:
  • 1994-06-01
Citation:
Viennot, P., Savage, C., and Villard, J., "Compact Turbo-Machinery for a Micro-Gravity-Compatible Freezer Application," SAE Technical Paper 941529, 1994, https://doi.org/10.4271/941529.
Pages:
11
Abstract:
The paper describes the pre-development of the compact turbo-inachinery forming the heart of a reverse- Brayton-cycle refrigeration unit for application in a microgravity-compatible freezer. The machine has been configured to provide refrigeration at -80°C in the face of continuous loads of 10 W and transient loads of up to 30 W without disturbing the microgravity environment. Other important requirements were: operational life-time without maintenance of at least 10 years, high coefficient of performance to minimise power consumption, low mass and small size.In the interests of reliability and microgravity compatibility, the compressor wheel and the expansion turbine have been mounted on the same shaft, driven by a brushless DC electric motor. This approach assures the most compact design, however, it gave rise to complex design iterations. The need to minimise thermal losses resulting from conduction through the shaft and to avoid mechanical resonance effects at the very high (up to 200000 Rpm) shaft speeds, also presented interesting design challenges.Results are presented covering tests on each of the individual components together with performance projection of the complete machine.
Access
Now
SAE MOBILUS Subscriber? You may already have access.
Buy
Select
Price
List
Download
$27.00
Mail
$27.00
Members save up to 40% off list price.
Share
HTML for Linking to Page
Page URL

Related Items

Technical Paper / Journal Article
2004-07-19
Technical Paper / Journal Article
1999-10-19
Standard
2017-11-30
Technical Paper / Journal Article
1999-10-19
Technical Paper / Journal Article
1959-01-01