alt.energy.renewable

Roland Mösl a écrit :

>> Its slightly better than PV, but not much.
>> Which begs the question why isnt it many times better.
>> Mirrors are more than 90% efficient at reflecting sunlight,
>> so why is the plants cost in terms of dollars per watt so poor.
>>
>> The plant is going to cover 3 sq miles which equals million sq
>> meters.
>> At 1000 watts per square meter the plant should make GW if it
>> was 100% efficient, but its only going to make 280 MW which makes it
>> only 3% efficient.
>> Where is all the energy lost.
>
> Not all the area are mirrors
>
> From the mirror surface
>
> 90% reflected
> 70% turned in the target into heat
> 30% converted into electric power
>
> Gives 18,9% over all.
>
> BTW, there are concerns that birds could collide
> with wind power plants.
>
> At this plant, birds could fall down from the sky
> grilled

Or more dramatic: birds only made blind by crossing the
hot beam flying mad until crashing randomly. Or just
unable to fly straight due to some burned feathers.

And who wonders about the flying insects that will probably
disappear from the area.

Will wild life be allowed to live in the area? In example,
dears with their antlers could dammage trough reflectors if
not set high enough.

Will vegetation be allowed to grow?

In 1982, Pierre Boule, the autor of
"The Bridge over the Kwai River", wrote a ironical *novel*
("Mirrors of the Sun", "Miroitements" in french) about
a solar power plant which led to ecological disasters,
covered up, ...

Erdy