Moon & Mars Orbiting Spinning Tether Transport - Tethers Unlimited

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Appendix L: <strong>Tether</strong> Boost Facility Design Final Reportinsulation. Removing waste heat from the batteries and power conversion unit will bethe main driver in thermal system sizing. This waste heat is expected to be on theorder of 35-40 kW minimum and will be in a fairly compact area. The support areafor the batteries and power conversion unit must be limited as much as possible tolimit overhead mass and limit thermal capacitance of the support structure for apassive system or cold plate for an active system. Using current and near-termtechnologies, to remove this amount of heat from a limited area will require a fluidloop interfaced to a set of heat exchangers. The heat exchangers would then beinterfaced to a set of radiators as shown in Figure 3-6. The desired batterytemperature and range is 25°C ± 5°C. The power system design requires that thebattery temperature range be limited in order to achieve desired battery life.Fluid LoopsBattBattBattBattBattBattSensorInputsControllerHeatExchanger& PumpSystemSensorInputsRadiatorBattBattBattBattBattBattBattBattBattBattery Support Cold PlateFigure 3-6. Thermal Control System SchematicThe 10 year life requirement will require an extremely reliable heatexchanger/pump system and the cost and complexity would be similar to the fluidloop systems used on ISS. A similar heat removal loop will be needed for the powerconversion unit as shown in Figure 3-7. The desired power conversion unittemperature and range is 80°C ± 5°C. The power system design requires that thepower conversion unit temperature range be limited in order to achieve desiredreliability.The two heat exchanger systems can be designed to work on the same fluidloop with heat removal occurring in the battery units first as shown in Figure 3-8. Atrade study will need to be conducted in the next design phase to see if this isfeasible. The design driver for a combined system sizing is the amount of heat thatmust be removed from the battery stage and the amount fluid flow required to meetthe inlet temperature to the power conversion unit stage.L-63
Appendix L: <strong>Tether</strong> Boost Facility Design Final ReportFluid LoopsMOSFETUnitMOSFETUnitMOSFETUnitMOSFETUnitMOSFETUnitMOSFETUnitSensorInputsControllerHeatExchanger& PumpSystemSensorInputsRadiatorMOSFETUnitMOSFETUnitMOSFETUnitMOSFETUnitMOSFETUnitMOSFETUnitMOSFETUnitMOSFETUnitMOSFETUnitPower Conversion Unit Cold PlateFigure 3-7. Control Station Heat Removal LoopFluid LoopsBattBattBattSensorInputsControllerSensorInputsRadiatorBattery SupportCold PlateBattBattBattBatt Batt BattHeatExchanger& PumpSystemBattBattBattBattBattBattSensorSignalsMOSFETUnitMOSFETUnitMOSFETUnitMOSFETUnitMOSFETUnitMOSFETUnitPower Conversion UnitCold PlateMOSFETUnitMOSFETUnitMOSFETUnitMOSFETUnitMOSFETUnitMOSFETUnitMOSFETUnitMOSFETUnitMOSFETUnitFigure 3-8. Dual Heat Exchanger Concept.L-64
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Tethers Unlimited, Inc.MMOSTT Final
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NIAC Funded Tether Research• Moon
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Electrodynamic Reboost• Power sup
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Cislunar Tether Transport System•
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MXER Tethers Included in NASA’sII
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5mt Payload Tether Boost Facilityfo
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LEOGTO Boost Facility• Initial Fa
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Tether Boost FacilityControl Statio
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LEOGTO Boost Facility• TetherSim
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Rendezvous• Rapid AR&C Capability
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Proposed RETRIEVE TetherExperiment
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µTORQUE on Delta IV• Delta-IV Se
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Opportunities for NASATechnology De
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AIAA 2000-3842COMMERCIAL DEVELOPMEN
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--Commercial Tether Transport AIAA
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-Commercial Tether Transport AIAA 2
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Commercial Tether Transport AIAA 20
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Commercial Tether Transport AIAA 20
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Momentum Exchange/Electrodynamic Re
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DESIGN AND SIMULATION OF A TETHER B
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Tether Boost Facility Design AIAA 2
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Tethers Unlimited, Inc.Cislunar Tet
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Interim Report Outline- Configurati
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Mission Definition¥ Payload Capaci
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Baseline Control Station DetailsTET
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Baseline Grapple AssemblyCAPTURES A
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LEO Facility System ArchitectureGRA
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Payload Adapter Assembly Subsystems
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Potential Reeling FunctionsReeling
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LEO Control Station Weights16
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Payload Adapter Assembly Weights18
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Tether Boost FacilityRequired Power
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Electrical Propulsion Voltage´ Spe
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Potential Reeling FunctionsReeling
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Preliminary Reeling AnalysisθθAss
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Tether Boost FacilitySystem Require
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Table of Contents1 Scope ..........
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2 ReferencesThis section lists docu
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The system shall measure and contro
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4 Ground Rules & AssumptionsThis se
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Appendix F: Tether Boost Facility D
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Appendix F Tether Boost Facility De
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Appendix F Tether Boost Facility De
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Page 130 and 131: Appendix F: Tether Boost Facility D
Page 142 and 143: Appendix L: Tether Boost Facility D
Page 194 and 195: Tethers Unlimited, Inc.Tether Rende
Page 206 and 207: Ongoing Tether Work Under NIAC Fund
Page 208 and 209: Cislunar Tether Transport System•
Page 210 and 211: Rapid Earth-Mars Transport• Reusa
Page 212 and 213: EarthMars Launch Windows• MMOSTT
Page 214 and 215: Incremental Development Path1. TORQ
Page 216 and 217: LEOGTO Boost Facility• TetherSim
Page 218 and 219: Tether Boost FacilityControl Statio
Page 220 and 221: Modular Design• Design Components
Page 222 and 223: Payload Accommodation AssemblyConfi
Page 224 and 225: Electrodynamic Thrusting• Drive c
Page 226 and 227: Tether Facility Reboost• Use Elec
Page 228 and 229: Rendezvous• Rapid Automated Rende
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Rendezvous Method: Preparation• P
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Development Issues• Automated Ren
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Potential Flight Experiments• Hig
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Opportunities for NASATechnology De
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Acknowledgements• Boeing/RSS - Jo
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IAF-99-A.5.10RAPID INTERPLANETARY T
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Rapid Interplanetary Tether Transpo
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IAF-00-S.6.04TETHER SYSTEMS FOR SAT
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IAF-00-S.6.04controlled very precis
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IAF-00-S.6.04Perigee Altitude (km)3
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IAF-00-S.6.04The LEO⇒GTO Tether B
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IAF-00-S.6.04AcknowledgmentsThis re
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Tethers Unlimited, Inc.Appendix K:
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Tethers Unlimited, Inc.at a rate of
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Tethers Unlimited, Inc.Appendix L -
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Tethers Unlimited, Inc.Appendixm M:
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Appendix N. MXER Tether for Deployi
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Electrodynamic Thrustingto Reboost
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100000 95000 90000 85000 80000 7500
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Momentum Exchange/Electrodynamic Re
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NOMENCLATURESymbol MeaningA payload
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DepartureangleA = 1.5π - (ω + u
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Tether material has a "characterist
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Rendezvous of Grapple with PayloadT
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adius vector to the new center of m
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days from payload pickup at one pla
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"JupiterandBeyond"Tether cut CUT:<
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Tethers Unlimited, Inc.Appendix Q:
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Tethers Unlimited, Inc.Appendix R:
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Moon & Mars Orbiting Spinning Tether Transport - Tethers Unlimited

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