July 18, 2005

Toronto Hydro, Enwave to shift major downtown towers to deep lake water cooling system

A plan by Toronto Hydro-Electric System and Enwave Energy to expand Toronto's Deep Lake Water Cooling (DLWC) system to more downtown buildings will reduce their electricity use for air conditioning by 90% and deliver an estimated ten megawatts (MW) of peak demand electricity savings. The joint, $1.6-million energy conservation project will replace existing air conditioning equipment with DLWC technology in the Richmond Adelaide Centre, Adelaide Place, Queen's Park and three other buildings.

Enwave and Toronto Hydro will begin transitioning the properties to more efficient and lower-cost air conditioning as early as September 2005. The projected energy savings from this project are enough to power more than 1,000 homes or six million square feet of office space. This represents a significant reduction in Toronto's daily electrical demand, which now stands at roughly 5,000 MW. As an added benefit, the initiative will eliminate ten tonnes of chlorofluorocarbon (CFC) refrigerant.

This agreement is the second project to be announced since Toronto Hydro made a commitment to reduce peak energy consumption in Toronto by up to 250 MW. To achieve this goal, the company is dedicating $39.8 million to conservation and demand management programs through 2007.

Toronto Hydro president and CEO David O'Brien pointed out that "not only are we conserving energy, but we're supporting a clean, renewable technology. This one project is equivalent to taking 2,600 cars off the road. It complements other Toronto Hydro projects like the wind turbine at Exhibition Place and our solar energy panels at our Commissioners Street facility."

Enwave's DLWC technology draws icy-cold water (4 degrees Celsius) from a permanent, renewable supply 83 metres below the surface of Lake Ontario. Through a heat exchange process at Toronto's John Street pumping station, the "coldness" of the lake water-not the actual water itself-is used to produce chilled water which is then used to air condition buildings in downtown Toronto. Toronto Hydro's investment supports the expansion of Enwave's system.

"This is a great environmental win for the City of Toronto," said Mayor David Miller. "By finding such a creative way to reduce our reliance on fossil fuels, we are improving the air quality for Torontonians, and setting an example for the world of how to build a sustainable city."

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