Francis Turbine Twin Runners Double Discharge
Francis twin runners, or Francis double discharge have several advantages. Norcan’s experience shows that Francis twin turbines have a significant advantage over the conventional option of two horizontal Francis turbines and generators. Or a single larger diameter vertical unit that is more costly. Francis twin and Francis Camelback designs were created over 100 years ago because they provided smaller diameters and were easier to manufacture. Also, their higher speed made generators more cost-effective. Which is even more important in today’s volatile economic landscape. Francis’ twin flexibility gives higher efficiency at partial loads. This advantage is significant for many hydropower projects. Norcan has developed a unique skill set for Francis twin modernizations. With a similar approach to the Francis Camelback. Norcan’s new Francis double discharge design is better adapted to the hydropower generating station parameters. As a result, they provide higher efficiencies across the operating load, increasing the power output an average of 14% to 20%.
Carver Falls, Vermont
Modernization with a new Francis twin double discharge 26.5 in., 673 mm, 1600 kW turbine. For this project, Norcan provided, engineering, manufacturing turbine, dismantling, installation and commissioning.
Woronoco Falls, Massachusetts
Modernization with a new Francis twin double discharge hybrid 45 in., 1143 mm, 2126 kW turbine. Norcan's scope of supply included, engineering, manufacturing of the turbine, dismantling, installation, and commissioning.
Essex 19, Vermont
Complete power plant modernization, water to wire package. The replacement of two existing horizontal Francis turbines with a new Norcan Francis twin double discharge 29.5 in., 750 mm, 870 kW turbine. Norcan's scope of supply included, engineering, manufacturing of the turbine, supply of the generator, dismantling, installation and commissioning.
South River, Ontario
Modernization with a generator and a new Francis twin double discharge 25 in., 635 mm, 750 kW turbine. Norcan provided, engineering, manufacturing of turbines, supply of balance of plant, supply of generator, dismantling, installation and commissioning.
