Scam in the wind?

[rescwood]

I was asked by a company which offers me a wind turbine which seems rather miraculous: http://www.greenenergy.li/pagina11.html

From the information available on the page referenced above, I compared the advertised powers to the available gross power (Pd) and to the maximum usable power (Pm; Betz limit)

Formula used: P = 0.5 * Cp * r * S * v ^ 3
with:
Cp: ​​power coefficient, 1 for calculating Pd, 0.595 for calculating Pm
r: density of air (1.25 Kg / m ^ 3)
S: Area (6m ^ 2 = area advertised on the web page)
v: wind speed



There is an error last box at the bottom right -> 2.37 not 1.41

If I am not mistaken, this wind turbine creates energy from wind speeds greater than 4m / sec, below if we take into account the Betz limit.

Where is the error?

[boubka]

Hello
for the calculations am not knowledgeable enough to say.
on the other hand I visited the site and there is still a big problem:
all photos are montages and moreover very poorly made.
I don't know if it's a scam? but it doesn't smell very good

[elephant]

bad enough site in .li (where is that?)

[rescwood]

I sent a stammering tite to the guy:

Mister Erauw

I have land well exposed to the prevailing winds on the Ardennes plateau (near Martelange - altitude 480m - More than 4,5 m / s for more than 2200 hours per year) and I plan to install a wind turbine there. low power (<= 10kW). While looking for information on the net, I came across your page.

From the information available on your site, I compared the advertised powers to the available gross power (Pd) and to the maximum usable power (Pm; Betz limit)

Formula used: P = 0.5 * Cp * r * S * v ^ 3
with:
Cp: ​​power coefficient, 1 for calculating Pd, 0.595 for calculating Pm
r: density of air (1.25 Kg / m ^ 3)
S: Area (6m ^ 2 = area advertised on the web page)
v: wind speed

See attached file (There is an error last box at the bottom right -> 2.37 not 1.41)

According to my reasoning, this wind turbine would create energy from wind speeds greater than 4m / sec, and even below if we take into account the Betz limit.

Where could I have been wrong?
Can you by enlighten me enlighten me on how to interpret your figures so that you can assess the wind potential of my land if I install your machine there.

Thank you.,

Response from this brave gentleman:

Dear Benoit,
The actual gross collection is 15 m2 (vacuum included) (after compression 6 m2 / mass 1.941 kg / m3 / 1 atm / 0 m sealevel)
The measurements were made in "real time"
due to the reaction to the irregularities of low-level winds, to "gusts" and to turbulence,
due to the combination Savonius (drag) / Darrieus (lift) / Vortex (accelerations and concentrations hydrogen atoms (c))
due to the compression of the booster and the formation of the "vortex" The% Betz vary between 30 to 48% depending on the Darrieus point of attack (lift) and the direction of the wind
engine performance and inverter energy demand.
It is impossible to make theoretical calculations
results are aprox for wind speeds above 7m / sec (wind tunnel measurements)
mass 1,293 kg * m-3 (1% incl)
pressure 1 atm
height 0 m
www.greenenergy.li
green looks
Alex Erauw
Greenenergy.li
Fontenaille nr 2
6661 Mount
Belgium
Tel + 32 475 54 54 12
alexerauw@hotmail.com

?! ? !! ??

[rescwood]

.li: Lithuania?

[Former Oceano]

We trace:

code: Select all

www.greenenergy.li IP address location & more:
Host of the IP: www.greenenergy.li [Whois] [Reverse IP] 
Host IP [?]: 195.47.247.149 [Copy][Whois] [Reverse IP] 
IP country code: DK 
IP address country:  Denmark 
IP address state: Staden Kobenhavn 
IP address city: Copenhagen 
IP address latitude: 55.6667 
IP address longitude: 12.5833 
ISP of this IP [?]: One.com A/S 
Organization: One.com A/S 
Local time in Denmark:


It's Danish.

[Rudy46]

I got ripped off by this guy in 2009.
He had promised me a wind turbine which would provide me with 4000 kw / year.
He established a quote and asked me for a deposit of € 2.000.
We are in 2011 and I still don't have my wind turbine.
He promised to reimburse my deposit, I'm still waiting.

[Christophe]

Uh 2 years later you will never see your money again, I think.

Have you made a complaint? (UFC, DGCCRF ...)

ps: on a forum public, you have to prove this kind of accusation ... do you have a purchase order to scan?

[elephant]

+ 1,

You are welcome, Rudy, but we are not a defamation site: evidence, please.

[Christophe]

Rufy is actually Belgian, elephant, what are equivalent organizations in Belgium?

Test-Purchase for the UFC but for the DGCCRF I don't know?