The Great Lakes region, home to one of the world’s largest freshwater reserves, is on the brink of a significant leap in clean energy generation. As electricity demand soars, innovative submersible hydroelectric technology is set to play a crucial role in addressing energy needs in urban centres such as Chicago, Toronto, Montreal, and Detroit. This shift comes at a time when electricity prices are experiencing considerable increases across the United States.
Harnessing the Power of Water
The Great Lakes, despite lacking substantial tides or currents, are interconnected by various waterways that present opportunities for hydropower generation. Ocean Renewable Power Company (ORPC), known for its successful submersible projects in Alaska and Maine, has announced its inaugural urban venture on the St Lawrence River in Montreal. This project will see the installation of two hydroelectric devices, expected to start operations later this year.
Stuart Davies, CEO of ORPC, believes the St Lawrence River offers an unparalleled opportunity for hydropower due to its consistent high-velocity water flow. He estimates that the Montreal area alone has the potential to generate between 60 and 90 megawatts of electricity. “The Niagara River and the St Lawrence River are powerful waterways, driven by the hydrology of the lakes that drain into them,” he remarked.
ORPC’s devices employ carbon fibre turbines resembling the blades of traditional push lawnmowers, utilising the river’s flow to generate electricity. This technology is gaining traction globally, with projects in places like Scotland and South Korea demonstrating the potential of tidal and current-driven generators.
Rising Electricity Costs and Demand
The emergence of marine power generation is particularly timely, given the recent surge in electricity prices across the Great Lakes region. In Western New York, residents have already faced significant increases in their electricity bills, with further rate hikes anticipated. Similar challenges are affecting millions in Michigan and Ohio, where the demand for energy continues to escalate, exacerbated by the energy needs of data storage centres.
While ORPC’s devices generate between half a megawatt and five megawatts of power—insufficient to fully meet the demands of large data centres—they do offer viable solutions for industrial customers. Davies emphasised the reliability of their technology, stating that it could serve as a 24/7 electricity resource, providing emergency power even when grid failures occur.
Navigating Environmental Concerns
Despite the promise of hydrokinetic energy, the deployment of turbines in waterways raises environmental concerns. In particular, the potential impact on local fish populations and other wildlife has prompted scrutiny from environmental advocates. Anne KC McCooey of the Black Rock Riverside Alliance in Buffalo expressed cautious support for hydropower, underscoring the need for responsible implementation that safeguards ecosystems.
ORPC, however, points to its successful track record in Alaska, where turbines have operated without harming local fish populations. The company is committed to ensuring environmental compatibility in its projects, particularly in the Great Lakes, where the presence of slow-moving waters presents unique challenges.
In an innovative approach to tapping into slower currents, researchers like Michael Bernitsas from the University of Michigan are developing technologies that can harness hydro energy from water moving at just half a metre per second. His Vivace system uses oscillating cylinders to convert kinetic energy into electricity, significantly expanding the potential for clean energy generation in the region.
Future Prospects and Expanding Horizons
The absence of salt in Great Lakes waters offers a distinct advantage for hydropower projects, reducing corrosion issues common in ocean-based systems and extending the lifespan of materials. Furthermore, ORPC’s plans extend beyond the Great Lakes; they are exploring opportunities along the lower Mississippi River, with a potential project slated for late next year.
Davies noted that the shift in federal policy regarding renewable energy subsidies has created a more competitive landscape for marine energy technologies. Despite the challenges posed by the current energy policy environment, interest in ORPC’s innovations has surged, with inquiries from over 70 countries.
Why it Matters
The integration of next-generation submersible hydropower technology into the Great Lakes energy landscape represents a pivotal step towards sustainable energy solutions. As cities grapple with rising electricity costs and increasing demand, harnessing the region’s abundant water resources could provide a reliable, clean energy alternative. Balancing technological advancement with environmental stewardship will be crucial in ensuring that these initiatives benefit both the economy and the ecosystem, paving the way for a greener, more sustainable future.
