Ocean Energy



In order to prevent the worldwide increasing demand for energy from leading to unjustifiable consequences for mankind and the environment, in particular caused by global warming, it is necessary to harness energy more and more from renewable sources. In demand are ecologically and economically sustainable and efficient methods of power generation.

The use of the oceans as an energy source can offer a meaningful contribution to the future energy mix in many regions. Especially where ample resources are found close to important power consumers (two thirds of the global population lives in coastal areas). In this case investments in electricity infrastructure and line losses can be minimized.


Market Requirements


Ocean energy converters harness the energy from waves or currents. The kinetic energy is absorbed by a mechanical structure and transferred to a downstream converter, the so called power-take-off-system (PTO). The output of the PTO typically provides electric power. Besides converting the energy, other tasks of the PTO are usually frequency adaption, limiting, smoothening and storing of the absorbed energy.


Technical Requirements:

The deployment in the sea poses extreme requirements on the device:

The corrosive medium salt water requires special materials and coatings. In extrem conditions forces occur, which can exceed the cut-in level of the converter by a factor of 1000. In most cases maintenance work can only be executed with high effort and during limited time slots. Following requirements can be derived from that:

  • High availability
  • Long maintenance intervals of up to 5 years
  • High life cycle time of up to 30 years
  • Protection against environmental conditions (e.g. salt water)
  • High efficiency over a wide load range

i.e. decisive for the success of all ocean energy concepts are robust and reliable solutions, which are suitable for the application under such rough environmental conditions.

In the long term only a few device concepts will prevail – those which respect the decisive factor for success: The levelised costs of electricity. And these costs are determined by investment and operating costs, life time, efficiency and availability.