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have been used throughout history in a wide variety of configurations. Most designs capture the water's kinetic energy, i.e. energy stored in the water's motion. Between 2004 and 2010, Lodewyk Botha and Marek
Sredzki developed an inflow turbine that captures water's potential energy in addition to
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energy are harvested, providing higher energy extraction efficiency than a kinetic energy only approach. This is the principal difference between traditional water wheels and the water wall turbine design. It is this difference that allows a water wall turbine to operate effectively in low head
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Water wall turbines do not require barrages or catchment ponds and thus have minimal impact on the tidal effect in estuaries, making them suitable for sensitive environments. All of the electrical and mechanical components of a water wall turbine are in closed-containment above the waterline,
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system. In this deployment, the water wall turbine features a straight flow-to-drive turbine mounted on a self-floating platform. The vessel is 28-meters long and 17-meters wide and weighs roughly 550 metric tons. The project serves
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mitigating the environmental impact to the waterway. The blades are arranged along the horizontal axis and turn slower than the speed of the current which results in a minimal risk to fish, sea mammals, or their habitats.
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A water wall turbine may be designed for a wide range of marine and freshwater installations including tidal zones, rivers, and canals, with its own flotation or on pylons. In contrast to other types of turbines such as
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to channel and accelerate the useable current. Studies in laboratory conditions have demonstrated that water wall turbines can achieve an efficiency of up to 90%.
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to build up across the turbine, hydraulically propagated over the total vertical submerged blade. The turbine's catamaran-style floats use the
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environments. A water wall turbine's large rotating blade structure moves slower than the current, “blocking” the flow. In doing so, it causes
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In 2015, a study regarding the modeling and optimization of water wall turbines was conducted by the
Canadian Hydraulics Centre of the
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The first full-scale water wall turbine project was completed in 2016 by Water Wall
Turbine Inc. It features a 1MW power plant and a
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operation using radial blades that rotate around a horizontal axis. The water wall turbine is suitable for energy extraction from
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82:. Independent studies regarding the efficiency and theory of a water wall turbine's operation have also been published.
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MĂĽller, G. (2009). "Recent developments in hydropower with very low head differences". University of
Southampton, UK.
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designed to utilize hydrostatic pressure differences for low head hydropower generation. It supports bidirectional
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504:"Potential for using the floating body structure to increase the efficiency of a free stream energy converter"
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its kinetic energy. Principal patents for the technology were registered and published between 2005 and 2011.
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582:"Experimental investigation on the effect of channel width on flexible rubber blade water wheel performance"
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Batten, W.; Weichbrodt, F.; Müller, G.; Hadler, J.; Semlow, C.; Hochbaum, M.; Dimke, S.; Fröhle, P. (2011).
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in BC, Canada. The deployment demonstrates the technology's ability to power remote communities.
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Front End
Engineering and Design Study (FEED) for the Dent Island Tidal Power Generation Project
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Hydrostatic
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The turbine's bidirectional rotation operates inline with the free current flow. Both
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installations, the turbine operates in both directions as the tide ebbs and flows.
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462:"The rotary hydraulic pressure, machine for very low head, hydropower sites"
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Canadian
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330:"3D Modelling and Optimization of a Hydrokinetic Power Generation Barge"
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543:"Design and stability of a floating free stream energy converter"
548:. University of Southampton, UK, University of Rostock, Germany.
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305:"New tidal energy technology could power remote BC communities"
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Water Wall
Turbine Dent Island Tidal Power Generation Project
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Water wall turbine hydrostatic pressure converter principle
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Paudel, S.; Linton, N.; Zanke, U.; Saenger, N. (2013).
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328:Baker, S.; Cornett, A.; Kluijver, M. (2015).
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460:Senior, J.; Wiemann, P.; MĂĽller, G. (2008).
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419:Journal of Hydraulic Research
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741:Pico hydro
709:generation
699:Hydropower
314:2019-11-16
290:2019-11-17
227:2019-11-17
204:References
172:Hydropower
37:freshwater
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68:microgrid
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29:inflow
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