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1 Incubator Designs for Space Flight Application Optimization and Automation A. Hoehn, J. B.Freeman, M.Jacobson, L.S.Stodieck BioServe Space Technologies,

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Presentation on theme: "1 Incubator Designs for Space Flight Application Optimization and Automation A. Hoehn, J. B.Freeman, M.Jacobson, L.S.Stodieck BioServe Space Technologies,"— Presentation transcript:

1 1 Incubator Designs for Space Flight Application Optimization and Automation A. Hoehn, J. B.Freeman, M.Jacobson, L.S.Stodieck BioServe Space Technologies, University of Colorado SAE paper 1999-01-2177 29th International Conference on Environmental Systems July 11-15, 1999, Denver, CO

2 2 Space Shuttle Experiment Accommodation

3 3 Experiment Accommodation environmental control / experiment execution Isolate Gravity as sole independent variable: uniform ground vs.. flight environment / centrifuge ? temperature most influential, but: launch / landing, moisture, atmosphere

4 4 Typical Thermoelectric Heat Pump Assembly Temperature-Controlled Device water-, air-heat exchanger, device Thermoelectric Heat Pump Air Heat Exchanger Forced Convection Cooling

5 5 Required Heat Pump Capacity

6 6 Heat Pump Optimization

7 7 Forced Convective Cooling ? Densely packed Larger temperature gradients due to heat transport Option: Water-cooled walls External Insulation High thermal Conductivity

8 8 PGBA Thermal Management Subsystem l Solid state Peltier devices used to “pump” heat from liquid loops to air heat exchanger

9 9 Temperature Gradients - Heat Transport

10 10 Temperature Transients Loading Power Loss Transport New Setpoint

11 11 Internal Heat Sources - Gradients STS-93 STARS Payload: (Space Technology and Research Students) l Middle and High Schools across US and Chile participate. l STARS-1 based on experiment proposed by students in Chile l SPACEHAB Inc., a number of schools and other organizations participating l Hardware Highlights: »5 habitat for plants, aphids, ladybugs, butterflies »10 high resolution color cameras / frame grabber »active temperature control »passive humidity and gas control

12 12 Light as heat source l Radiant heat transfer: »1-3degC temperature increase »provide conductive pathways »water-cool directly Illuminated Cultures:

13 13 Individually Controlled Experiment Accommodation temperature profiles for automated experiment activation and termination

14 14 Liquid Coolant Loop 9 individual PID controllers under power limit (130 Watt)

15 15 Individual Temperature Profile Control lag due to thermal mass

16 16 Incubator Future l Better insulation: vacuum panels, aerogels »power reduction »longer unpowered times (ISS: 2 hrs.) l Unpowered temperature control: »phase change materials »vacuum insulation l Transport to / from ISS: »longer temperature stability, even unpowered STS-93 7/20/99

17 17 Acknowledgements Incubator Designs for Space Flight Application Optimization and Automation Brian Biesterfeld, Jim Clawson, Jake B.Freeman, Jon Genova, Don Geering, Kevin Gifford, Mindy Jacobson, Brett Landin, Diane Naylor, Mark Rupert, Steve Schneider, Dave Simmons, Louis S.Stodieck BioServe Space Technologies, University of Colorado NASA grants: NASA-MAR: NCC8-131 (NASA MSFC cooperative agreement) and NASA-NCC2-5290 (NASA Ames cooperative agreement). Debra Reiss-Bubenheim, Rudi Aquilina, Shawn Bengston, Steve Patterson, NASA Ames Research Center SAE paper 1999-01-2177

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