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Thermal & Fluids Analysis Workshop 2002Thermal & Fluids Analysis Workshop 2002
InIn--Situ Resource Utilization (ISRU) Thermal, Situ Resource Utilization (ISRU) Thermal, Fluid, and Process ModelingFluid, and Process Modeling
NASA-JSCTom Simon281-483-7547tsimon@ems.jsc.nasa.gov
AbstractAbstractIn-Situ Resource Utilization (ISRU) Thermal, Fluid, and Process Modeling
Modeling of In-Situ Resource Utilization technologies and systems have been performed to support trade studies and ground testing. The models are used to determine promising methods and technologies of producing consumables for various missions including both robotic and manned missions to the moon and Mars. Testing of these technologies and overall systems rely on the models to help size components and develop operating procedures for specific production goals. This presentation will focus on the modeling done in support of an ISRU system that is sized for a robotic Mars sample return mission, producing 32 grams/hour ofmethane and 62 grams/hour of oxygen. This paper will cover the water electrolysis subsystem analysis and design, including testing to date.
28/1/20028/1/2002
Tom Simon NASA JSCTom Simon NASA JSC 2
InIn--Situ Resource Utilization Situ Resource Utilization (ISRU)(ISRU)
Modeling Performed– By NASA and Others– Support Trade Studies– Support Testing
• Component Design• Subsystems• End-to-End Systems
ISRU Background– Living Off The Land– Develop Systems To
Provide Consumables– To Support Robotic
and Human Exploration
– Can Reduce Cost and Increase Safety
38/1/20028/1/2002
Tom Simon NASA JSCTom Simon NASA JSC 3
Specific JSC ISRU ModelingSpecific JSC ISRU Modeling
Trade Studies– Determine Systems Best Suited To Meet Goals
Of Missions: Qualitative– Size Systems To Provide Estimate Of System
Parameters: Quantitative
Testing Support– JSC Testing Of Technologies
Requires Design (If JSC Fabricated)Requires System Design and Modeling
48/1/20028/1/2002
Tom Simon NASA JSCTom Simon NASA JSC 4
Modeling Supporting JSC TestingModeling Supporting JSC Testing
2nd Generation ISRU System Design & Testing– Main Components
CO2 Freezer (Lockheed Martin)Sabatier Reactor (JSC)Water Electrolysis (Hamilton Sundstrand)Common Bulkhead Cryogenic Storage Tank (Lockheed Martin)
– Sized For Robotic Mars Sample Return Mission32 g/hr of CH4, 62 g/hr of O2
280 kg/yr (618 lb/yr) of CH4, 543 kg/yr (1197 lb/yr) of O2
(24 hrs/day Operation)8/1/2002 Tom Simon NASA JSC 5
8/1/2002 Tom Simon NASA JSC 5
Modeling Supporting JSC TestingModeling Supporting JSC Testing
Water Electrolysis Subsystem Design– System Requirements Defined– System Components Designed or Procured To
Support Hamilton Sundstrand Built ElectrolyzerSabatier Reactor Subsystem Design– System Requirements Defined– Sabatier Reactor Model, Design, and Fabrication– System Components Designed or Procured To
Support JSC Built Sabatier Reactor
68/1/20028/1/2002
Tom Simon NASA JSCTom Simon NASA JSC 6
MIST Water Electrolysis Unit MIST Water Electrolysis Unit System ConfigurationSystem Configuration
MIST Liquid Anode Feed WEU From Hamilton SundstrandDesign of WEU System Configuration– Mass Flow Rate Calculations– Set Requirements for Hardware– Select Hardware– System Schematic– Pro/Engineer Model
78/1/20028/1/2002
Tom Simon NASA JSCTom Simon NASA JSC 7
Where to begin?Where to begin?
Inputs– Recommendations from
Hamilton Sundstrand– Improvements desired
over first ISPP breadboard
Procedure followed– Determine the WEU
requirements– Select components and
configuration of system to meet requirements
– Select miniature, flight like components
88/1/20028/1/2002
Tom Simon NASA JSCTom Simon NASA JSC 8
Fluid AnalysisFluid AnalysisCH4 kg/hr
CH4 kg/hr H2O kg/hrH2 kg/hr psia H2 kg/hr
H2O kg/hr CH4 kg/hr Vent H2O kg/hrpsia H2 kg/hr psia
H2O kg/hr H2O kg/hr To Sabatierpsia H2 kg/hr
H2 psia
Separator H2 kg/hrH2O kg/hr
psia
in H2O O2 kg/hrWEU H2O kg/hr
psiain H2O
VentH2O kg/hr O2 kg/hr
psia H2O kg/hrpsia in H2O
H2O kg/hrpsia
200 psia
Water Circulation Pump
Qdot
Water Feed Pump
H2O kg/hrpsia
H2OPS
36.985195
O2/
0.07845
H2/
H2OPS
75
0.0340.0010.00245
ColdPlate
0.001
0.66145
0.585
DIBed
HoldingTank
0.00175
19537.643
0.06500.0033195
0.0080.58575
0.065
0.0090.000475
FromSabatier
0.03440.000945
0.0340.001
Filter
Filter
99
WEU RequirementsWEU RequirementsHydrogen Separator– Methane and Hydrogen go in– Two outlets
MethaneHydrogen
Water Electrolysis Unit– Water goes in– Two outlets
Hydrogen and waterOxygen and water
1010
Selected Components To PurchaseSelected Components To PurchaseFinding the right components– Searching the internet for
miniature components that meet the requirements
– These components include:Water feed pumpWater circulation pumpLatching solenoid valvesDelta pressure transducerFeed line filterCirculation loop filterCheck valvesCold PlateCartridge HeatersMicro Pump Series 120
8/1/2002 Tom Simon NASA JSC 118/1/2002 Tom Simon NASA JSC 11
Components Designed forComponents Designed forInIn--House FabricationHouse Fabrication
On-site produced hardware– Sizing components to meet our
needs– These components include
Phase Separator Tanks– Three units to separate water
and gasesDeionization bed
– Cation resin bed to remove possible iron, chrome, and platinum ions from water feed line
8/1/20028/1/2002
Tom Simon NASA JSCTom Simon NASA JSC
1212
MIST WEU ConclusionMIST WEU Conclusion
Initial configuration completedMIST hardware scheduled to be delivered in November
8/1/20028/1/2002
Tom Simon NASA JSCTom Simon NASA JSC
1515
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