Arrays of Lattices of small HAWTs lifted high in the sky



Arrays of Lattices of small HAWTs lifted high in the sky
Author: David Judbarovski, principle inventor, engineering and engineering systems,
retired engineer, Israel
email: judbarovski@gmail.com, CV see in Linkedin.com (David Judbarovski)
Earlier versions goes me back to about 10 years ago

Numerous small HAWTs (horizontal axis wind turbines) combined in a lattice, the said lattices are jointed each to another as a chain. Such device transforms wind kinetic energy in electricity. A total HAWT proportionally of its dimension is lighter and cheaper, so correspondingly the electricity production is cheaper. Being lifted in the sky, the wind velocity is bigger following exponential Hellmann law, while the HAWT power is in cube of wind velocity being more than 10 m/s at 500-900 m above open ocean surface. Low point of such device be fixed by a rope to a float stabilized in constant position.. The lion share of such electricity cost is a cost of electric generator of 30 Watt each, and being mass produced it is USD 100-200/kW + ~20% others, so our electricity would be about USD 180 / (~9000 hrs/yr. * 5 yr. payback) = 0.4 USA cents/kWh, for snowless southern regions, and about 0.6 cents/kWh for moderate climate. The balloon filled by hydrogen can be with lifting force tenfold bigger than drift force, while the weight of my design is negligible, so the space consume for it can be about 140 m * 140 m = 0.02 km2. If blades being 0.2 m radius with more than 30 watt for a HAWT, and for a 10 * (16 m/0.4)^2 * 30.0 W ~= 500 kW for one chain, or 25,000 kW/km2 ~= more than 200 million kWh/km2 by about 0.5 USA cent/kWh can be cheaply and very energy effective transformed in liquid ammonia directly even in the open sea as it was disclosed, for example, in http://judbarovski.blogspot.co.il/2017/07/fresh-look-on-wind-power-generation.html , while the said ammonia is excellent chemicals for its transportation and then for distributed electricity generation, and for a lot of kinds of chemical industry (fertilizers, fuel for transportation, explosive, plastics, and a lot of other important chemicals)            

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