Installed and generating energy in Connecticut, and at many locations in the UK and Europe.
Flat efficiency curve, up to 90%, means varying flows have small influence.
Simple and robust design requires minimal annual maintenance.
Energy generation easily calculable based on average rainfall, up-gradient catchment area and dam head.
Extensive testing in the U.S. have shown 100% survivability of migratory species like shad, herring and eels. Studies in the U.K. have shown similar outcomes.
Water is not accelerated or diverted so wetlands and water bodies are preserved.
Even substantial items can pass without harm to themselves or screw generator.
Proprietary systems control software adjusts for seasonal or other variations.
Based on a centuries old concept, the Archimedes screw, our technology partner has used modern screw turbines to pump water for over 50 years. They inverted turbines, enabled water to flow downward through them in existing waterways, and added a generator to produce clean electricity.
The world is faced with finding new ways to deliver renewable energy on the one hand, and protecting the environment on the other. The equation is complex whatever the technology and energy source, and NEHC believes that small-scale hydropower is a complement to either solar or wind—and far more productive based on capacity utilization factors, especially in the Northeast. Accounting for dry summers and frozen winter periods, NEHC can produce power at about 50%-80% capacity factors in rivers and canals—several times the capacity of wind and solar. The fuel—water—is plentiful and screw turbines as we use them in run-of-river circumstances do not deplete water or change the flow dynamics. The overall river flows remain unchanged.
The inherent qualities of Archimedes-based screw generators enable us to pursue the development of renewable, clean electric power. They turn slowly, about 30 turns per minute. If fish enter the top of the machine, they simply ride down the screw in a large tub of water and swim out at the bottom, largely undisturbed. Turbulence at the outflow of the screw generator is minimal due to the fact that the water is not accelerated or diverted in these run-of–river generating sites.
NEHC works with owners to establish the best approach to site development. Each site has different parameters, and while there are parallels between sites, each presents variables in geology, flow, history, finance, permit approach, wildlife, constituent base, scale, and ownership goals.
Recognizing broad differences in situations, NEHC’s primary aspiration is to develop, own and operate low-impact, hydropower facilities. Our ability to finance, permit, construct, and market power on a scale that enables a site that is commercially viable is determined by all of these factors.
Often, smaller sites can be developed independently by owners whose primary aspirations are to develop small-scale hydro in support of renewable, green, zero-emission goals while generating income.
NEHC supports owner’s interests on a fee-for-service basis from initial site review to final commissioning. After an initial, “quick look” to determine viability of even very small sites, we will provide: