The multi-purpose reservoir.
many parts of the United Kingdom we have reservoirs which
are used solely for the purpose of storing water for our consumption.
Some of these could also be used to provide electricity without
losing their storage function and without usurping huge additional
areas of land.
can be accomplished in one of two ways. Where the existing
dam has no great height,† by building second, higher Dam further
back from the existing Dam, toward the† water source and incorporating
turbines within it. This would allow the water to generate
power and still be retained in the lower area. Where there
is sufficient height in the existing dam it would be necessary
to build a smaller dam below the existing one to create a
the Dinorwic sytem, the power generated can be fed into the
grid during the times when consumer demand is high and, when
consumer demand drops the power generated can be used to pump
the water back into the upper area. The upper area would also
receive input from itís usual water source/s to help replenish
smaller and low-lying reservoirs the same principle can be
employed to generate sufficient electricity to power the pumps
and equipment, thus reducing the demand on the grid and freeing
up power for other purposes.
A illustrates the principle in simplified form. Pictures A
& B illustrate the amount of potential power that is,
at present, going to waste.
is even possible, in some areas, to construct a series of
dams, each of which would contain generators to provide electricity.
Thus re-using the† stored energy in the water many times.
The water in the lowest reservoir then being pumped back to
the highest to assist in maintaining the level.
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