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Space-Station Life-Support Planner
Suppose that your space station commander wants to keep a month's supply of oxygen and water on hand at all times. Decide how many people will live on your station. Then use these charts to calculate how much oxygen and water should be stored. Assume an average of one extravehicular activity (EVA) per person per day, and remember that you must use the air lock twice for each EVA.
| Oxygen Use | Requirement |
|---|---|
| Breathing | 0.8 kg/person/day |
| EVA | 0.6 kg/person/8-hour EVA |
| Leakage | 1.0 kg/day |
| Air-lock losses | 7.0 kg/air-lock use |
| Water Use | Requirement |
|---|---|
| Drinking | 1.9 kg/person/day |
| Food preparation | 1.2 kg/person/day |
| Washing clothes | 12.5 kg/person/day |
| Washing hands | 1.8 kg/person/day |
| Showering | 3.6 kg/person/day |
| Flushing toilet | 0.5 kg/person/day |
| EVA | 4.4 kg/person/8-hour EVA |
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