Aeronautical Wind Turbines

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sicetaitsimple
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Re: Aeronautical Wind Turbines




by sicetaitsimple » 23/11/19, 18:25

Christophe wrote:You have estimated the price of connection / maintenance at 300 km odds for wind turbines of reduced power? : Shock:

When we love, we do not count. : Lol:
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Eric DUPONT
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Re: Aeronautical Wind Turbines




by Eric DUPONT » 24/11/19, 07:56

you are well informed, what would be the power of such a machine and its price?
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Re: Aeronautical Wind Turbines




by Christophe » 24/11/19, 11:45

Eric Dupont wrote:you are well informed, what would be the power of such a machine and its price?


Is it you who raises this subject so you tell us no?

I see very badly a flying wind turbine to exceed the MW of power ... to see much less ...

This for a question of captured surface!

Add all the regulation on the ground, the management of the winds too strong or null, the distance of the dimensions and you will obtain a completely non-competitive cost ...

The only positive points that can be seen is possible transportability and commissioning and rapid assembly!

Interesting may be for the military or area devastated by disasters ....
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Eric DUPONT
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Re: Aeronautical Wind Turbines




by Eric DUPONT » 24/11/19, 12:50

on the ampyx site it seems that the targeted power is 5 Mw for a wing of 250 m2, in my opinion it must be the size of a boeing like 50 or 60 meter of scope.

"Scaling up to 5 MW: floating offshore at highly competitive cost

AP5 is a 200-250 m2 wing, coupled to larger generators:

Combined with a 3 MW AP5 generator will be able to produce more than just 20% more energy than AP4 at 10% lower cost, making it an altogether more profitable product.
Coupled to a 5 MW generator, AP5 unlocks the market for floating offshore wind energy at a highly competitive Levelized Cost of Energy (LCoE). "
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Re: Aeronautical Wind Turbines




by Christophe » 24/11/19, 13:44

Announce 5MW for 250 m² it's big big anything! 250 m² is the surface of the wings generating power is that?

Even if it is a generator carrier and not a propeller, it complies with the same rules as conventional wind turbine wings since it is the same physics (Betz and company ...)

The best small horizontal rotor wind turbines produce in 300W / m2 ... for wind speeds between 5,5 to 11 m / s (according to personal calculations *)

So a wind turbine that would scan 250 m2 could produce, at best, 250 * 300 = 75 kW is 5000 / 75 = 67 times less than 5MW ...

How is it possible to lie to this point?


250 m2 it is equivalent to a wind turbine of hardly Racine (250 * 4 / Pi) = 18 m of diameter !!

* another approach is to use constructor characteristics: https://www.enercon.de/fr/produits/ep-2/e-70/ (I take this one because I'm already in it)

Rated power 2.300 kW
Diameter of rotor 71 m


Swept surface: Pi * 71² / 4 = 3960 m²

We therefore have a nominal efficiency in W / m2 of 2 300 000 / 3960 = 580 W / m² or 600 W / m² in order of magnitude!

So we would go for 250 m² to 250 * 600 = 150 kW ... still very far from 5 MW ...

But actually during a hurricane she could do 5MW!

Indeed a wind turbine of 18 m in diameter needs a wind of 150 km / h to reach 5MW ... with important constraints on the structure ... It would be necessary to ask the engineers of ampyx to calculate in this case the diameter of the cable and the forces on the ground and on the various elements of the winch : Mrgreen: : Mrgreen: : Mrgreen:

Exact figures for a conventional wind turbine:

147,6 km / h 41 m / s 10522644,62 Wind power 5050869,42 Recoverable power * 5050,87 Power in kW


* overall yield 48%
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Eric DUPONT
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Re: Aeronautical Wind Turbines




by Eric DUPONT » 24/11/19, 14:33

I think that 250 M2 is the surface of the wing which can be 60 / 70 m of span and which sweeps can be a circle of 100 m of inside diameter for 200 outside meter, which would correspond to a wind turbine of 200 diameter meter for a swept area of ​​30000 square meters ie 100 times larger than the wing surface itself
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