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#11
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Marc 182 wrote:
:In article , says... : : The hurdle you run into right up front is that fairly trivially you can, : using technology known since the 1950s, get all the supplies you need : into about a kilo a day per person. : Now, you have to work out if you can fit your garden into a smaller mass than : this, it's not a easy task. : :What's life like living on a kilo a day? Baby food out of a tube? It's wrong in any event. You need that much WATER a day. -- "Rule Number One for Slayers - Don't die." -- Buffy, the Vampire Slayer |
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#13
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In article ,
Fred J. McCall wrote: :You can accept some small water losses, because human metabolism converts :food to CO2 and water... In addition to this, if you're using fuel cells for some of your power, you're producing water there as well. You do have to refuel those cells, but then the mass you're lifting is doing 'double duty'. A spacecraft that's up there long enough to be doing water recycling is *probably* going to be solar-powered; fuel-cell reactants simply weigh too much. Gemini and Apollo used fuel cells mostly because their basic design was fixed at a time when solar arrays were still in their infancy. (Note that Soyuz, designed only a few years later, uses solar power.) -- "Think outside the box -- the box isn't our friend." | Henry Spencer -- George Herbert | |
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