The immediate question that comes to mind is pay back period - how long
would it take (maintenance included) to actually make a profit. It
wouldn't surprise me if the answer came back at something like 50 years
before capital investment and maintenence was paid back and profit
actually began (indeed probably more when you consider the cost of
connection to the grid as well).
John
>
> Why don't BW fit waterwheels and/or water turbines to all of their
lock by-wash weirs and river weirs? These would make use excess water
flowing over the weirs to produce green electricity - which BW could
sell to make some money.
