2022 Fall Issue - 136
proactive
solution file
District Energy
Toronto's Deep Lake Water
Cooling system stands as an
example of the " third wave "
of urban energy.
As North America's fourthmost-populous
and fastestgrowing
large city, Toronto is
powering through with a robust
yet low-carbon expansion of
its energy capacity. Using its
Deep Lake Water Cooling (DLWC)
system, the city is able to
displace 55 megawatts of energy
per year from the grid-enough
to power eight hospitals.
To achieve these results, DLWC
harnesses cold water at the bottom
of Lake Ontario to cool hospitals,
data centers, educational campuses,
and government, commercial,
and residential buildings.
DLWC uses less than one-tenth the
energy required for conventional air
conditioning.
DLWC, the world's largest
lake-powered cooling system, is
operated by Toronto-based Enwave
Energy Corporation, a fully integrated
district energy company,
and was launched in 2004 at a
cost to the city of C$230 million
(US$179 million). With Enwave's
other district energy systems in
Toronto, DLWC serves as a prism
through which to understand the
background and status of district
energy generally.
Three Waves of Urban
Energy
In contrast with centralized energy
production and distribution to
distant end users, district energy
is generated by small local energy
producers and used by immediately
proximate end users.
Fernando Carou, manager
of renewable energy and net
zero development for the City of
Toronto, takes the long view of
where district energy has come
from and where it is headed. He
sees today's district energy as " the
third wave of urban energy. " The
three waves are:
CHUCK SCHILKE
Toronto is able to displace 55
megawatts of energy per year
from the grid using its Deep Lake
Water Cooling system. The DLWC
harnesses cold water at the bottom
of Lake Ontario to cool hospitals,
data centers, educational campuses,
and government, commercial, and
residential buildings.
136
URBAN LAND
FALL 2022
SHUTTERSTOCK
2022 Fall Issue
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