Lake bottom cold water energy storage

How does a deep lake water cooling system work?

The deep lake water cooling result is less energy consumption than other sources and significant reductions in water consumption. The system is so successful that it saves the city 90,000 mega-watt hours of electricity use annually, which can be equated to the energy needed to power a town of 25,000.

What are the benefits of a deep lake water cooling system?

The environmental benefits also run deep; the system currently displaces 55 MW of energy a year from Toronto’s electricity grid. The deep lake water cooling result is less energy consumption than other sources and significant reductions in water consumption.

Is a deep water lake cooling system a good idea for Toronto?

GHG emissions in Toronto were 38% lower in 2019 than in 1990. The deep water lake cooling system features prominently in the TransformTO plan, as it already saves 90,000 mega-watt hours of electricity use annually — roughly enough to power a town of 25,000.

What is hot water storage & how does it work?

As with chilled water storage, water can be heated and stored during periods of low thermal demand and then used during periods of high demand, ensuring that all thermal energy from the CHP system is eficiently utilized. Hot water storage coupled with CHP is especially attractive in cold northern climates that have high space heating requirements.

How does pumped hydro energy storage work?

For example, with pumped hydro energy storage, water is pumped from a lake to another, higher lake when there’s extra electricity and released back down through power-generating turbines when more electricity is needed. But that approach is limited by geography, and most potential sites in the United States have already been used.

What happens if a reservoir is heated during winter?

The heating of the upper reservoir during the winter season will shorten the period of ice cover as well as reduce the ice thickness. Mixing of the upper reservoir will occur earlier in spring and fall, when the pumped water from the lower lake is warmer and colder than the hypolimnion temperature of the reservoir, respectively.