Water Current Turbines for River Applications - Alaska Energy ...

WCT EvaluationNRCan-06-01071Cross-Axis Turbine- ENERGY ALLIANCE (Russia)Technology: This technology uses cross-axis turbines traditionally used for low head dam applications.They are housed in a duct that allows them to be placed in a swift flowing river without the use of adam. The units are expected to stay reliably secured by hydraulic and hydrodynamic forces. Thesubmerged units can be operated the year round, including the case when they are installed in the riverswith incomplete freezing of the river bed. The Energy Alliance plans to produce two versions ofsubmerged hydro-units - portable units with outputs from 1 to 5 kW and stationary units with outputsfrom 10 kW to 225kW. Portable submerged hydro-units are intended for generation of 12V and 28Vdirect current, depending on the parameters of stream flow and generator type. The hydro-unitcomprises: cross-axis turbine, synchronous generator with rectifier, accumulator and switchboard.Stationary submerged hydro-units are intended for generation of 220V and 380V, 50Hz AC. Theturbines require a minimum stream speed of 3 m/s and minimum flow through turbine of 0.46 m 3 /s flow.The maximum flow through turbine of for the largest system is approximately 3.2 m 3 /s.Application: The turbine is designed to work in both river and tidal waters.Stage of Development: The turbines are currently in production. Cost: up to 16 kW is approximately$14,600; an up to 30 kW unit is approximately $25,600; an up to 60 kW unit is priced around $45,600;and $62,600 is the estimated price for an up to 100 kW unit.Verdant Power Canada ULC 21