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Hybrid Propellant Module

Future Assumptions: 2015 and Beyond. Low Earth Orbit (LEO)

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Hybrid Propellant Module

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    23. Hybrid Propellant Module Power System Performance Guidelines Power Generation: 3.1 kW required at 100% duty cycle During LEO to Earth-Moon L1 transfer and return Energy Storage: Provide required power during shadow/chemical rocket use Cross-use capability Operating Life: 10 year system lifetime (~ 5 round trips) Preliminary Configuration PV Arrays: Rigid Planar structures Stowed on exterior of HPM Arrays retracted during chemical rocket firing Energy Storage: Flywheel systems 5.1 kWh capacity required Sharing functions with attitude control system

    24. Hybrid Propellant Module Power System RESULTS Technologies selected: Advanced crystalline multi-band gap photovoltaics 47% eff. @ AM0, 135 W/kg @ panel Flywheel energy storage 5.1 kWh capacity, 3.3 kW delivered, 89% DOD Advanced power processing 95% eff., 670 W/kg

    25. Hybrid Propellant Module Power System Technology Requirements my preliminary guesses - will fill out with better info

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