Solar Panels: silicon producers use “charcoal plantations,” but they only supply a fraction of the current demand of carbon for silicon production. The rest of the carbon supply come's from imported coal or coke, or the cutting and burning of “virgin” rainforest. #GreenEnergy 
MG-Si is the result of purifying silicon using heat and reducing agent. The silicon may be 99% purse. Additional processing is completed until ultrapure electronic grade silicon (EG-Si) is obtained. For for one ton (t) MG-Si (Globe) it requires 2.4 Tons of woodchips.
A single polysilicon plant like this one in Tennessee, USA. can draw 400 megawatts of electricity, enough power for about 300,000 homes. (Wacker Polysilicon)
Metallurgical grade silicon (mg-Si) from the smelter is
only about 99% pure, so it must undergo two more
energy-intensive processes before it can be made into solar cells.
only about 99% pure, so it must undergo two more
energy-intensive processes before it can be made into solar cells.
A polysilicon plant consumes ~1.6 - 6 t of
incoming mg-Si, and requires at least 175 MWh (or
more) of additional electricity per ton of polysilicon
produced - about 10 times the energy already used for
smelting each ton of mg silicon from ore.
incoming mg-Si, and requires at least 175 MWh (or
more) of additional electricity per ton of polysilicon
produced - about 10 times the energy already used for
smelting each ton of mg silicon from ore.
Still think solar panels are "green" ?
Logs cut from virgin Amazon rainforest lie ready to be fed into one of the nearly 1,200 ovens used to make charcoal.
• • •
Missing some Tweet in this thread? You can try to
force a refresh
