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Thermal Design of a Spaceflight Plant Chamber Payload
Technical Paper
2003-01-2583
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
PGBA, a 0.08m2 / 27 liter spaceflight plant chamber payload employs two temperature-controlled liquid coolant loops to control the temperature and humidity of the sealed plant chamber independently. Cabin-air cooled thermoelectric heat pumps control the temperature of the water-alcohol coolant fluid in each loop, which is circulated by small, low-power, magnetically-coupled positive displacement gear pumps, designed to meet NASA safety requirements. Pulse-width-modulated DC current control circuits, controlled by two PI software controllers, maintain temperature and humidity accurately. The coolant loops feature bellows-based expansion vessels to accommodate thermal expansion and pressure fluctuations. Pressure sensors monitor the proper function and performance of the system. Pressure decay tests and unique fill procedures should ensure leak and air bubble-free operation.
Authors
- Alex Hoehn - BioServe Space Technologies, NASA Research Partnership Center, University of Colorado at Boulder
- James Clawson - BioServe Space Technologies, NASA Research Partnership Center, University of Colorado at Boulder
- Jake Freeman - BioServe Space Technologies, NASA Research Partnership Center, University of Colorado at Boulder
- Jon Genova - BioServe Space Technologies, NASA Research Partnership Center, University of Colorado at Boulder
- Kevin Gifford - BioServe Space Technologies, NASA Research Partnership Center, University of Colorado at Boulder
- Louis Stodieck - BioServe Space Technologies, NASA Research Partnership Center, University of Colorado at Boulder
Topic
Citation
Hoehn, A., Clawson, J., Freeman, J., Genova, J. et al., "Thermal Design of a Spaceflight Plant Chamber Payload," SAE Technical Paper 2003-01-2583, 2003, https://doi.org/10.4271/2003-01-2583.Also In
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