The
systems,
which
connect
to
existing
building
air
conditioning
(AC)
units,
use
off-peak
energy
overnight
to
freeze
450
gallons
(about
1,700
litres)
of
water
in
an
insulated
tank.
The
resulting
stored
energy,
in
the
form
of
ice,
is
used
to
cool
buildings
during
hot
afternoons
when
electricity
demand
spikes
to
run
traditional
AC
systems.
Over
the
next
24
months,
SCPPA
will
pay
Colorado-based
Ice
Energy
to
install
its
systems
on
some
1,500
government,
industrial
and
commercial
buildings
in
the
service
territories
of
its
member
utilities.
The
project
is
equivalent
to…
