A surge in electricity demand and rising costs across the United States are propelling the Great Lakes region toward a significant shift in clean energy production. Leveraging advanced submersible hydroelectric technology, the region is poised to install innovative generators on its waterways, promising a sustainable solution to meet the pressing energy needs of urban centres such as Chicago, Toronto, and Detroit.
Harnessing Hydrokinetic Energy
The Great Lakes, which boast one of the largest freshwater reserves globally, lack the tidal forces typically associated with hydropower generation. However, connecting waterways like the St Lawrence and Niagara Rivers present viable opportunities for capturing hydrokinetic energy. The Ocean Renewable Power Company (ORPC) is spearheading this initiative, having announced its inaugural urban project in Montreal, where two hydroelectric devices will commence operations later this year.
Stuart Davies, ORPC’s CEO, highlighted the unique potential of the St Lawrence River. “The area offers consistent, high-velocity water for hundreds of miles, with Montreal alone harbouring a resource potential of 60-90 megawatts,” he noted. The technology utilises carbon fibre turbines, resembling traditional lawn mower blades, which are turned by the flow of water, effectively generating electricity.
Expanding Horizons: Future Projects and Innovations
The momentum behind marine energy generation is gaining traction, with ORPC planning a second project on the Niagara River in Buffalo, New York. This comes at a time when electricity prices have seen substantial increases, particularly in regions like western New York, where recent rate hikes have significantly impacted consumers. Similar trends are emerging in Michigan and Ohio, indicating a broader regional challenge in managing energy costs.
Current tidal and hydrokinetic power initiatives are not limited to the Great Lakes. For instance, in Scotland, Orbital Marine Power is set to deploy O2-X tidal devices in the Bay of Fundy, while the Sihwa Lake tidal power station in Korea generates approximately 550 gigawatt-hours annually—equivalent to the energy derived from 862,000 barrels of oil.
Environmental Considerations and Community Concerns
Despite the promising developments, the integration of hydrokinetic technology is not devoid of challenges. Environmental groups have raised concerns regarding the potential impact on local wildlife and ecosystems. Anne KC McCooey, of the Black Rock Riverside Alliance in Buffalo, emphasised the need for responsible energy solutions. “We support sustainable energy sources but stress that they must not harm the environment or its inhabitants,” she stated.
ORPC, however, asserts that its technology has demonstrated minimal ecological disruption. In Alaska, the company has reported no fish injuries from its turbines, which coexist with significant salmon populations. The focus on environmental compatibility is crucial, especially as scientists explore new technologies that can harness energy from slower-moving waters, such as Professor Michael Bernitsas’s Vivace system at the University of Michigan, which can generate electricity from currents as slow as half a metre per second.
A Shifting Energy Landscape
The Great Lakes region presents an advantageous environment for hydropower projects due to the absence of saltwater, which typically leads to corrosion issues in ocean-based systems. This allows for longer-lasting materials and reduced operational costs. ORPC’s successful project in Alaska has saved a remote village the equivalent of 23,000 gallons of diesel annually, significantly reducing carbon emissions.
Looking ahead, ORPC is also developing plans for a project along the lower Mississippi River, with operations anticipated to begin in late 2024. As the regulatory landscape evolves, particularly with changes in federal energy subsidies, the company is witnessing heightened interest from global entities, signalling a potential shift towards marine energy solutions.
Why it Matters
The transition towards hydrokinetic energy in the Great Lakes signifies a pivotal moment in the quest for sustainable energy solutions. As urban centres grapple with rising electricity demands and costs, the adoption of innovative technologies like those from ORPC could provide a sustainable, reliable energy source. This not only addresses immediate energy needs but also positions the Great Lakes as a leader in the renewable energy landscape, potentially influencing policies and practices well beyond North America.
