mars airplane thermoelectric carbon dioxide propellant generator paul rosensteel michael mcvey...
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Mars Airplane Thermoelectric Carbon Dioxide Propellant Generator
Paul Rosensteel
Michael McVey
Advisor: Dr. Robert Ash
NASA ARES (Aerial Regional-NASA ARES (Aerial Regional-Scale Environmental Survey)Scale Environmental Survey)
Mars AirplaneMars Airplane
Propulsion Unit
Problem StatementProblem Statement
Develop a test bed for thermoelectric device application and viability as a renewable source of solid CO2 production for use as a propellant on the NASA ARES (Aerial Regional-Scale Environmental Survey ) Vehicle
Mars ConditionsMars Conditions
Atmosphere: 95.32% carbon dioxide, 2.7% nitrogen, 1.6% argon, 0.13% oxygen and 0.07% carbon monoxide with variable water content.
Pressure: 4.56 torr (0.006 atm). Gravity: 37.95% (3.711m/s2) of Earth’s. Temperature: Average surface temperature is 210
K and ranges from 185 to 235 K at the middle latitudes.
Thermoelectric DeviceThermoelectric Device
Peltier EffectPeltier Effect
Ultrasonic Distance DetectorUltrasonic Distance Detector
Ultrasonic Ultrasonic DeviceDeviceSchematicSchematic
Ultrasonic Sensor CircuitUltrasonic Sensor Circuit
Sensor SetupSensor Setup
Vacuum Chamber SetupVacuum Chamber Setup
Vacuum Chamber SetupVacuum Chamber Setup
MeasurementsMeasurements
Chamber PressureChamber TemperatureTH and TC of TE Device
TR Heat Sink Temperature
Dry Ice Layer Thickness – Range DetectorDevice Power
Experimental DataExperimental Data
Experimental Run Two
-90-80-70-60-50-40-30-20-10
030 60 90 12
015
018
021
024
030
033
036
0
Time (s)
Tem
per
atu
re (
deg
C)
Chamber Temperature
Resevoir Temperature
Hot Side Temperature
Cold Side Temperature
Experimental DataExperimental Data
Constant power of 10Watts applied.Constant chamber pressure of 5.8 Torr.No detected dry ice layer.Gas composition 98% CO2, 2% misc.
QC = hASΔT = 0.069W
COP = 0.0069
ConclusionsConclusions
Improved experimental design setup.
More robust equipment required.Dry ice production possible.Feasible propellant option.
Safety and EnvironmentalSafety and Environmental
Carbon Dioxide build up during testing. Handling of pressurized gas. Electrical shock hazard potential. Extreme cold exposure.
No hazardous gases or chemicals. Recycling of Carbon Dioxide. Solar power energy use.
ImprovementsImprovements
Higher capacity Peltier device.Chamber dimension:
1) Pressure Chamber
2) Smaller volume – 1100cm3 vs. 0.1m3
3) Thermal Isolation of connectionsCooling method – Liquid Nitrogen
COCO22 Propulsion Propulsion
Questions and Answers