Tag: intake pipes

Big City Cooler With Great Lakes Water

The city of Toronto is using the deep, chilly waters of a Great Lake as “green” air conditioning for some of its skyscrapers. The Great Lakes Radio Consortium’s David Sommerstein explains how:

Transcript

The city of Toronto is using the deep, chilly waters of a Great Lake as
“green” air conditioning for some of its skyscrapers. The Great Lakes Radio
Consortium’s David Sommerstein explains how:


Toronto and a provincial pension fund joined forces to form a company
called Enwave. It plunged three new intake pipes 3 miles out and 270 feet
deep into Lake Ontario. The pipes suck up near-icy water, which is used to
cool other water that’s pumped to air conditioning systems around the city.
The original water is re-used as drinking water.


Chris Asimakis is Chief Operating Officer of Enwave. He says the project
saves energy and reduces pollution.


“Literally you’re offsetting between 75 and 90 percent of the electricity that
you would have otherwise used and paid for to run a traditional type chiller.
And as a result, the air in Toronto is cleaner because we’re displacing
electricity generation from coal-fired plants, as an example.”


The project has the capacity to air condition 100 office buildings or 8,000
homes. Current clients include some of Toronto’s most prominent
landmarks, including the home of the Toronto Maple Leafs hockey team.


For the Great Lakes Radio Consortium, I’m David Sommerstein.

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Radio Waves Zap Zebra Mussels

Researchers say low frequency radio waves may be a more effective way of controlling zebra mussels. The Great Lakes Radio Consortium’s Tom Scheck has the story:

Transcript

Researchers say low frequency radio waves may be a more effective way of controlling zebra mussels. The Great Lakes Radio Consortium’s Tom Scheck reports.

Zebra mussels have caused millions of dollars of damage to power plants, boats and intake pipes. They’ve also seriously hurt native species in the Great Lakes and other inland waterways. Purdue University chemistry professor Matthew Ryan says he may have found a way to control the zebra mussels without harming fish or other aquatic wildlife. In the laboratory, he says low frequency electromagnetic radio waves were found to cause the zebra mussels to lose critical minerals at a much faster rate than they can acquire them.


“It ultimately kills them. There’s a stress response after a day or so. They stop feeding and begin to close their shells and after about 19 days about 50 percent of the mussels in a given population will be dead.”


Ryan says native fish and clams were not harmed when exposed to the same technique. If it’s proven effective in the wild, he says electrical barriers could block mussels from infesting other lakes and streams. For the Great Lake Radio Consortium, I’m Tom Scheck in Saint Paul.