XPost: sci.space.policy, sci.physics   
      
   In sci.physics Serigo  wrote:   
   > On 10/14/2016 1:30 PM, Fred J. McCall wrote:   
   >> Serigo  wrote:   
   >>   
   >>> On 10/14/2016 6:25 AM, Greg (Strider) Moore wrote:   
   >>>> "Jeff Findley"  wrote in message   
   >>>> news:MPG.326a76e45028f09b98983c@news.eternal-september.org...   
   >>>>>   
   >>>>> In article , jimp@specsol.spam.sux.com   
   >>>>> says...   
   >>>>>>> It's not like we're constrained on how much space we are going to >   
   >>>>>> spread out   
   >>>>>>> our solar panels over. No neighbors are going to complain.   
   >   
   >>>>>> Yeah, sure it would be possible to cover half of Mars with solar   
   >>>>>> panels and get lots of power but that is not practical nor economical.   
   >>>>   
   >>>> Nor necessary.   
   >>>>   
   >>>>>>   
   >>>>>> To get the energy of a little 50 MW reactor you need well over a million   
   >>>>>> square meters of solar panels that only work during daylight.   
   >>>>   
   >>>> That's nice, you're the one claiming that you want 50 MW of power 24/7.   
   >>>> No one else is claiming that.   
   >>>>   
   >>>>>>   
   >   
   >>>>> So bring a nuclear reactor, but you'll be constrained as to how bit it   
   >>>>> can be, so I seriously doubt you're going to see a 50 MW reactor on Mars   
   >>>>> anytime soon.   
   >>>>>   
   >>>>> Jeff   
   >>>>   
   >   
   >>>> Nor will you need one! I mean ISS provides its complete power for the US   
   >>>> section at 120kw.   
   >>>> So small reactor, or a bunch of relatively cheap solar panels.   
   >>>>   
   >>>   
   >>> but ISS does not provide its own food, nor clean clothes, nor   
   >>> replacement water and N2 and only supports 3 people, 6 for short times   
   >>>   
   >   
   >> Uh, no.  Normal crew on ISS is 6-7 people.  You think we're shipping   
   >> up huge loads of WATER to ISS?  That's really quite funny. In reality,   
   >> ISS gets about 2,000 litres a year of 'replacement water'.  Most of   
   >> the water on ISS already comes from recycling.  Note that water is   
   >> used to generate O2 on ISS. 'Replacement' N2 is a vanishingly small   
   >> amount.   
   >>   
   >> Mars has lots of in situ water and nitrogen.  On Mars you'd just wash   
   >> clothes.   
   >>   
   >>   
   >   
   > Nasa says 0.43 gallons per day per person + 0.21 gallons for food per   
   > person, another NASA site says ISS uses 3 gallons per day per person   
      
   The AMA says the average person needs to consume about a gallon of   
   water per day.   
      
   Cooking food, cleaning eating utensils, and washing anything would   
   be on top of that.   
      
   > ISS has a N2 tank on the side of it.   
   >   
   > what is needed is a way to "wash" clothes without water.   
      
   Not really as you need water for so many other things that if you have   
   sufficient water for those you can also wash things.   
      
      
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