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(AWE Textbook note) "dense-array", "sparse-array", "cross-linked", and "kite-sprawl" defined

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  • dave santos
    This is now a determined effort to keep the Springer AWE Textbook Editors from omitting (or logically debunking) those high-consequence concepts and
    Message 1 of 1 , Nov 9, 2012
      This is now a determined effort to keep the Springer AWE Textbook Editors from omitting (or logically debunking) those high-consequence concepts and calculations that invalidate the claims of effective utility-scaling by single spread-out kite-units (like NTS and Makani promote). This note answers helpful terminology questions Roland posed regarding AWES land/airspace usage as presented in TACO1.0. 

      All comments welcomed.

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      Presume equivalent L/D kite-units below-

      Let a hypothetical AWES "Dense-Array" (kitefarm) be defined in terms of a frontal airspace solidity-factor of 2% or greater. Thus a frontal airspace of 1km2 contains an AWES dense-array if the frontal area of the array is equal or greater than 20,000m2. Streamtube efficiency of the frontal airspace wind energy extraction can be maximized.

      Let an AWES "Sparse-Array" (kitefarm) be defined as a frontal solidity of equal or less than 1%. A Makani M5 in its airspace, as a reference model, conservatively falls below a frontal solidity-factor of 0.3%, so its a sparse-array unit. Overall airspace streamtube efficiency is low.

      Let "Cross-Linked" be defined as the lateral rigging of lines aloft to gang kite units into a team. This assists closer packed formations with less potential for interference, less controls, etc..

      Let "Kite-Sprawl" be defined as the extreme "spread-out" effect on land and airspace usage of AWES Sparse-Arrays, as currently proposed for utility scale (gigawatt-scale). Sprawl is specifically caused by the high spacing requirements of giving clear 360 tether-scope to single-anchor single-kite cells. Crosslinked stacked multi-anchored kites avoid sprawl.


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