XPost: sci.space.policy, sci.physics   
   From: invalid@invalid.com   
      
   On 10/16/2016 12:17 AM, Fred J. McCall wrote:   
   > You know, Chimp, you're an intellectual coward.  If you want to reply   
   > to me, REPLY TO ME, not to some troll quoting me.   
   >   
   > jimp@specsol.spam.sux.com wrote:   
   >   
   >> In sci.physics Serigo  wrote:   
   >>> On 10/15/2016 5:34 AM, Fred J. McCall wrote:   
   >>>> jimp@specsol.spam.sux.com wrote:   
   >>>>   
   >>>   
   >>>>>   
   >>>>> So how much to put about 25 of these on Mars so you can convert dirt   
   >>>>> to structural steel?   
   >>>>>   
      
   >>>> Why in the hell would you need 32 MW of power to make steel?  Total   
   >>>> power required to make a ton of steel from ore is around 5 MW-hrs.   
   >>>> You'd size your operation based on the power you had available and how   
   >>>> much steel you need.   
   >>>>   
   >>>>   
   >>>   
   >>> Wrong again.  you skipped over the part where you get ore from dirt, how   
   >>> much energy is that ?   
   >>   
   >> It actually takes 10-19 MW to turn iron ore into steel, not counting   
   >> the energy required to dig out, transport, and crush the ore.   
   >>   
   >   
   > Nope.  National averages run around 5.5 MW-hr per tonne.   
      
   Wrong.   
      
      
      
   >>   
   >> Making steel requires a lot of oxygen.   
   >>   
   >   
   > Yes, it does.  So?   
      
   Mars does not have any O2.   
      
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