Critical Design Review Transit Power Critical Design Review Patrick Kennedy 3 / 6 / 01

Update Regenerative Fuel Cells Solar Arrays Batteries

Regenerative Fuel Cells 20 kW Down from 30 kW Power during Launch Power during Landing Back-up power in transit

Regenerative Fuel Cells (cont.) 5 days of operation Mass: 3300 kg Down from 4600 kg Volume: 6.6 m3 Down from 7.8 m3

Solar Panels 47.5 kW of power Mass: 2000 kg Area: 323 m2 Recharge power Cryogenic equipment Mass: 2000 kg Area: 323 m2 Reliability: 99%

Solar Panels (cont.) Folded Volume: 12 m3 2 6m x 1m x 1m sections Image from: http://spaceflight.nasa.gov/shuttle/archives/sts-97/cargo/

Image from: http://spaceflight.nasa.gov/shuttle/archives/sts-97/index.html

Batteries CTV Power: 7 kW Mass: 1800 kg Volume: 1.74 m^3 Power during landing Power during launch Power: 7 kW Mass: 1800 kg Assume: 9 hour discharge time (X-38) Volume: 1.74 m^3