1. Brandon Abel – Human Factors zFebruary 13, 2001 – Preliminary Design Review zPressurization System zWater System zIn-Situ propellant/Fuel Cell zConsumables zMission Comparison zCost/Risk Assessment zFuture

2. Pressurization System zCabin at 14.7 psia z80% Nitrogen z20% Oxygen zShuttle and Space Station z 4 Oxygen/4 Nitrogen Tanks z Oxygen Tanks - Mass(O2) = 256 kg - Mass = 75 kg - Vol. = 1.14 m^3 Nitrogen Tanks

3. Water Tanks zRadius = 0.32 m zLength = 2.64 m zMass = 100 kg z4 for hygiene water z2 for potable water

4. In-Situ Propellant Production /Fuel Cell Back-Up zIn-Situ Propellant Production zUsed as a back-up for oxygen and water for stay on Mars and return trip to Earth z Fuel Cell System z No back-up planned

5. Mass/Volumes

6. Free Return versus Direct zFor a mission of 5 crew members z640 days consumables on Hab for exact same mass and volume zTherefore, 342 days needed for ERV zThis would require 1444 more kg of consumables for the ERV

7. Cost Assessment /Risk Assessment zCost Assessment zAir/Water based on shuttle system designs zNew equipment needed to be built zFilter Systems need designed z Risk Assessment z Proven designs z Pressurization system z Water tanks z In-Situ back-up z ERV back-up

8. Future Works zMedical equipment zLower requirements zPower inputs zMission Comparison