DEXA WAVE

During 2011 – 12 DEXAWAVE installed a scale 1:5 prototype at DanWEC Hanstholm.

The system experienced practical problems with the PTO and the mooring system. 

DEXAWAVE started in 2008 testing a small model at AAU in 2009 followed by building a 1:10 scale model installed in Nissum Bredning leading to the installation at DanWEC.

Terminated activities in 2012.

POINT ABSORBER 1998 – 2001

During the Danish Wave Energy Program the PA concept was investigated via survival experiments 1998, power production and experiments in scale 1:10 June 1999, test in Nissum Bredning, Hydraulic PTO dry test in scale 1:4 at DTU and on a 2.5 meter diameter float in the flume at DMI 2001 followed by a feasibility study of a 100 MW plant in the North sea of Denmark.

Principle: The float is moved up and down by the waves relative to a gravity/suction cup based seabed structure.  This relative motion activates a hydraulic PTO including a hydraulic piston that drives a hydraulic motor that drives a generator. In the hydraulic system is included accumulators that smooth out the pulsating energy from the waves.  A synthetic rope is inserted between the hydraulic piston pump and the seabed.

Contact: Kin@ramboll.com

DANISH WAVE POWER, DWP 1988 – 1996

DANISH WAVE POWER, DWP 1988 – 1996

History: DWP tested two Wave Energy Converters outside Hanstholm in the North sea of Denmark.

The first WEC was a 45 kW unit of 600 ton concrete placed on 30 meter deep water outside Hanstholm in 1988-90 (lower photos) – followed by a smaller scale 1:4 experiment with a 2.5 meter diameter float connected to a sea-based pump on 25 meter deep water (upper photos) in 1994-96.

Data over a six month period was obtained on performance and survival loads at Hanstholm.

Danish Wave Power Aps,  was founded by B.Højlund Rasmussen, NKT, Flygt Pumper and Højgaard & Schultz. The principle of the Float Pump system was invented by Kim Nielsen.

Contact: Kin@ramboll.com

KNS WAVE POWER CONVERTER 1985

KNS WAVE POWER CONVERTER 1985

Kim Nielsen’s first wave energy converter was tested in 1985 over six month in the sound Øresund grid connected to the house of his parents in Espergærde.

The prototype was equipped with a submersible 1kW turbine generator (Flygt design) activated by 8 float driven sea water piston pumps. a 1 kW pilot plant.

The project was carried out as a 3-year Post Doc project at the department of Ocean Engineering  DTU combined with Danish government funding which made it possible to build launch and monitor the performance of the system.

Contact: Kin@ramboll.com