Tuesday, May 25, 2010


Size matters for turbines too
The Hydrovolts Flipwing Turbine has many compelling advantages compared to other hydro turbines and to other kinds of electricity generators. It has many features, including being complete, compact, modular, safe, simple and scalable.

The Hydrovolts turbine is scalable in two fundamental ways.

First, the Hydrovolts turbine can be built in nearly any size, from very small to quite large. More importantly, the turbine's cross-axis design is rectangular, so it can be built in a broad range of different dimensions. Turbines can be built that are very wide but not very high, or they can be built more squarely. Propeller-type axial turbines always have a circular swept area, so they are ill-suited to water channels that are, for example, broad and shallow. Even with a cowling such turbines are not as adaptable because they cannot scale to arbitrary dimensions like the Hydrovolts turbine.

Second, the typical Hydrovolts turbine is a micro-scale device, and will generate 5-20kW in typical water flows. In very large channels multiple turbines can be deployed side-by-side in the channel, scaling up the power produced by deploying multiple turbines together. Where the water course is deep, turbines can also be positioned one above the other to take advantage of the height of the water column. Turbines can also be spaced one after the other down a water course. Even though any turbine slows the water as it extracts energy, gravity re-accelerates the water as the channel slopes away. Hydrovolts expects turbines typically can be placed 10 per mile, but the maximum rate will depend on the specific watercourse geometry.

Scalable is good. Power from Water.
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