It has been a rough eight months for Verdant. Days after the first two turbines were lowered into the water, the East River’s powerful currents sheared off the tips of several blades about a third of the way down.
New blades were ordered, made of a cast aluminum that theoretically would hold up better. They replaced the ones that were broken, and were also installed on four more turbines that were lowered into the river’s eastern channel earlier this year.
East River Fights Bid to Harness Its Currents for Electricity
Together, the turbines were capable of producing about 1,000 kilowatt hours a day of clean electricity. But the East River tides have proved too formidable even for the stronger blades, putting excessive strain on the bolts that hold them to the turbine hubs.
To keep them from coming apart, all six of the 20-foot-tall mechanisms, which resemble ship propellers on masts, have been shut down for repairs and may not be back in operation until November.
Video here: Electricity from the East River