| Development History The original concept of a hydrodynamic blade system deriving lift/thrust from the energy contained in wave motions was evolved by David Dipnall as a means of attaining supplementary propulsion for marine craft. There have, over the years, been many attempts to resolve the issues of this challenge, many patent applications, and very few successful outcomes. Like many before him, David Dipnall followed the concept of the up-and-down wave motion providing kinetic energy which could be collected via horizontal hydrodynamic blades reacting to the vertical component of particle motion within the waves. Small-scale tests soon revealed how inefficient this simple approach was. Not only did the water flows simply change direction to the detriment of lift, but other flow directions pre-existed which would not be contributory to the single-plane foil blade. Analysis of these essentially chaotic flows led to the development of the multiple-axis Cetus blade, which captures flows from any direction, and ensures that maximum optimisations of lift/drag ratios are achieved. It became obvious that the thrust forces produced by the Cetus blade could be applied in both rotary and linear configurations, and this has led to its development as the prime component of wave/tideflow turbines as well as its originally-conceived purpose of ship propulsion. This extended development phase was undertaken after the first blade models were produced by Silhouette Designs P/L, and the potential of the concept was realised. Cetus Energy Systems P/L has evolved as the host Development Company, concentrating its efforts primarily on Cetus blade optimisation for a range of applications. It will work in association with other joint venture partners or licensed developers to provide the turnkey solutions to specific power applications. |
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