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Tidal Energy Applications In Canada

Thank You!

What are tides?

  • Caused by water bulges around the earth (Webb, n.d.)
  • Created by inertial and gravitational forces (Webb, n.d.)

What are Tides?

Webb, P. (n.d.-b). Figure 11.1.6 [Illustration]. 11.1 Tidal Forces - Introduction to Oceanography. https://rwu.pressbooks.pub/app/uploads/sites/7/2019/05/neaptide.png

How these forces relate to tides coming in and going out

Movement in Bulges

New Zealand Government. (n.d.). Moving Tidal Bulges [Illustration]. Land Information New Zealand. https://www.linz.govt.nz/sea/tides/introduction-tides/cause-and-nature-tides

How these forces relate to tides coming in and going out

  • The sun also has a gravitational force which contributes to the tide (Webb, n.d.)
  • As the moon rotates around the earth, it's relation to the sun effects the strength tide (Webb, n.d.)

The effect of the sun

Tidal Energy Timeline

How Tidal Energy is Harvested

Tidal grain mills

Tidal Grain Mills

-Water brought into storage ponds while tides rise (Ashby, n.d.)

-Once full high tide is reached, water is blocked into pond until low tide (Ashby, n.d.)

-Once water levels elsewhere are low enough, the stored water is released to turn a water wheel (Ashby, n.d.)

Wikipedia Contributors. (n.d.). Tidal mill at Olhão, Portugal [Photograph]. Tide Mill. https://en.wikipedia.org/wiki/Tide_mill

Tidal Barrages

-Ebb generation, comparable to tide mills

-2-way generation, less total energy

(Hanania et al., 2021)

Tidal Barrages

The La Rance tidal barrage. (n.d.). [Phtotgraph]. TETHYS. https://tethys.pnnl.gov/project-sites/la-rance-tidal-barrage

Tethys. (2021). The Annapolis Tidal Generating Station [Photograph]. https://www.offshore-energy.biz/north-americas-oldest-tidal-power-plant-set-for-closing/

Turbine Systems

-Similar to a wind turbine under water (EIA, n.d.)

-More environmentally friendly (Hanania et al., 2021)

-Difficulties relating to durability (EIA, n.d.)

Freestanding Tidal Turbines

Pope, A. (2022, April 21). Testing the future of tidal energy in Nova Scotia [Video]. Canadian Geographic. https://canadiangeographic.ca/articles/testing-the-future-of-tidal-energy-in-nova-scotia/

Bay of fundy

- The highest tides in the world

-Caused by the geography of bay, and oscilation (bayoffundy.com, 2019)

Bay of Fundy

Need for tidal energy in Nova Scotia

Need for Renewables in Nova Scotia

CER - Canada Energy Regulator. (2019). Figure 2: Electricity Generation by Fuel Type (2019) [Graph]. Provincial and Territorial Energy Profiles – Nova Scotia. https://www.cer-rec.gc.ca/en/data-analysis/energy-markets/provincial-territorial-energy-profiles/provincial-territorial-energy-profiles-nova-scotia.html#:%7E:text=Nova%20Scotia’s%20primary%20source%20of,hydro%2C%20wind%2C%20and%20biomass.

Economic Benefits of Tidal

Economic Benefits

“Investing in new kinds of energy production, like tidal energy, creates jobs in Nova Scotia and across Canada. Investing in tidal energy helps get us to zero emissions by 2050.”

The Honourable Seamus O’Regan

Canada’s Minister of Natural Resources

Socioeconomic and Environmental Considerations

  • Tidal energy is of great expense (EIA, n.d.)
  • Unknown harms/disturbance for environment (Furness et al. 2012)
  • Importance of Lobster in Nova Scotia (Campbell, 2021)

Socioeconomic and Environmental Concerns

Chandler, F. C., & Vaughan, A. V. (2022). Fishing boats loaded with traps head from port in West Dover, N.S., in 2019. [Photograph]. CBC. https://www.cbc.ca/news/canada/nova-scotia/lobster-fisherman-s-push-to-sell-licence-moves-a-step-forward-1.6348005

Works Cited

Works Cited

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