XPost: sci.space.policy, sci.physics   
   From: alain245@videotron.ca   
      
   Le Oct/16/2016 à 4:00 PM, Serigo a écrit :   
   > On 10/15/2016 11:23 PM, Fred J. McCall wrote:   
   >> Serigo  wrote:   
   >>   
   >>> On 10/15/2016 5:02 AM, Fred J. McCall wrote:   
   >>>> jimp@specsol.spam.sux.com wrote:   
   >>>>   
   >>>>> In sci.physics "Greg \(Strider\) Moore"   
   >>>>>  wrote:   
   >>>>>> "Jeff Findley"  wrote in message   
   >>>>>> news:MPG.326a76e45028f09b98983c@news.eternal-september.org...   
   >>>>>>>   
   >>>   
   >>>>>>   
   >>>>>> 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.   
   >>>>>   
   >>>>> Sigh.   
   >>>>>   
   >>>>> Mars is much farther from the Sun than ISS and has an atmosphere, the   
   >>>>> net results of which is that there is far less power available on the   
   >>>>> surface of Mars than there is at the ISS.   
   >>>>>   
   >>>>> To get an average daily output of 120 kW on Mars you need about   
   >>>>> 3,000 square meters of solar panels.   
   >>>>>   
   >>>>   
   >>>> Sigh.   
   >>>>   
   >>>> Now do the math.  That's a square around 55 meters on a side.  In   
   >>>> other words, it's TRIVIAL.   
   >>>>   
   >>>   
   >>> square is not the problem, moron,   
   >>>   
   >>   
   >> Then why does Jimp the Chimp keep raising it as THE issue?   
   >   
   > answer the question, you never have anthing specific, no weight, no   
   > volumes, no costs, nothing   
   >   
   > no wonder you are lost.   
   >   
   >>   
   >>>   
   >>>  it is shipping WEIGHT and DUST clogging solar panels   
   >>>   
   >>   
   >> They actually weigh very little   
   >   
   > WRONG.  1# per sq foot, including mounts and cables.   
   >   
   >> and you could just make them on Mars   
   >   
   > WRONG. you got a cleanroom up there?   how much WATER does it take to   
   > mfgr a panel ?   
      
   You don't need lots of water and a clean room to make solar panels. You   
   need those to make high performance solar panel. If you manufacture your   
   own panels on Mars, you would probably go for easy to do low efficiency   
   panels at first. On Earth, people are willing to pay a little more in   
   order to have 10 m^2 of panels instead of 500 m^2 of panels. But on   
   Mars, the neighbours are far away and you can use lots of surface area.   
      
      
   Alain Fournier   
      
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