Loading ...
Sorry, an error occurred while loading the content.
 

Copper v. Plastic Cable Power-Transfer Potential (Plastic kicks butt)

Expand Messages
  • dave santos
    Physicist Alex Bolonkin calculates that modern artificial fiber power transmission is 2682 times more efficient by weight, & more than 540 times by
    Message 1 of 3 , Jan 12, 2011

      Physicist Alex Bolonkin calculates that modern artificial fiber power transmission is 2682 times more efficient by weight, & more than 540 times by cross-section, than bare copper. KiteLab has found mechanical power transmission far superior to electrical conductors by many direct experiments. Aluminum is hardly better, given its low fatigue life. This sorry picture does not even count flygen weight. Some hope higher voltages than Alex's 1000V assumption can work, but there are terrible operational & design trade-offs. It increasingly seems flygen ventures lack competative viability, especially for high-altitudes.

       

      This from the NASA annotated AWE bibliography-

       

      Bolonkin, A. (2004). Utilization of Wind Energy at High Altitude.  Providence : AIAA. http://arxiv.org/ftp/physics/papers/0701/0701114.pdf

      • The use of artificial fibers instead of copper
        • For 20 MW and voltage 1000 V the cross sections are Cu: 20,000 AF: 37 mm^2
        • Cable length of 25 km, weight of Cu: 8930 tons, AF: 3.33 tons
        • AF is also much cheaper

    • Joe Faust
      2001 September 6 Method of Utilization a Flow Energy and Power Installation Filed: September 6, 2001
      Message 2 of 3 , Jan 12, 2011

        2001 September 6      Method of Utilization a Flow Energy and Power Installation   Filed: September 6, 2001

         

      • Doug
        Yeah, and imagine those fibers helically wrapped into a driveshaft, with your kites elongated and hardened into blades, attached to a central hub to control
        Message 3 of 3 , Jan 12, 2011
          Yeah, and imagine those fibers helically wrapped into a driveshaft, with your kites elongated and hardened into blades, attached to a central hub to control the path, and you're once again back to Superturbine(R).

          --- In AirborneWindEnergy@yahoogroups.com, dave santos <santos137@...> wrote: SEE
        Your message has been successfully submitted and would be delivered to recipients shortly.