Originally posted by sir_chancealot
Originally posted by EnlightenUp
... It sounds too good to be true somehow though. What's the catch? How much energy is needed for the constant water circulation and other
requirements per year? How much energy is in the biofuel produced per year? ...
If it's in New Mexico, who cares how much energy is needed? It can be supplied by solar!
Since it takes 746 Watts per HP and running water pumps on a large farm will definitely take many HP worth of pumps. Of course some solar input to run
the plant would be used; it would be foolish not to. There would be times it would have to draw off the grid or use on on site generator.
The plus that the energy density per acre is 100 to 200 times greater than other methods of obtaining biofuels assuming similar BTUs per unit mass in
the fuels.
What I want to hear is a net output per acre and not a gross output per acre. This means to subtract from the gross the number of gallons of fuel that
represent the energy input to the plant required to grow the algae.
The efficiency of that plant would be %Eff = 100*Enet/Egross. The question is is it positive (and is must be highly so), zero or negative?
With claims like this I like to see some simple calculations that tell more about the viability of the technology than the hype ever will.