The launch of the 237 tonnes prototype Wave Dragon was a milestone in the rewarding development and cooperation between the Wave Dragon inventor Erik Friis-Madsen, coordinator Hans Sørensen, SPOK AsP, Aalborg University and companies from Denmark, UK, Ireland, Austria, Germany and Sweden. The developing activities are performed by Wave Dragon ApS owned by the participating companies. After launch Wave Dragon tugged to Nissum Bredning for extensive testing activities to optimise the Wave Dragon technology. Wave Dragon will be connected and produce electricity to the grid over a longer period of time.
From 2003 to 2005 a development consortium will perform long term and real sea test on hydraulic behaviour, turbine strategy and power production to the grid. The 4.35 mill. € project has been secured through substantial grants from the Danish Energy Administration (1.7 mill. €), EU (1.5 mill. €) and from the Danish system operator Elkraft System's RTD fund (0.25 mill. €).
Wave Dragon is a slack moored device of the overtopping type, consisting of two wave reflectors focusing the waves towards the ramp, where water overtop into a reservoir. The pressure height in the reservoir is converted into power through a number of variable speed axial turbines.
In a project co-funded by the Danish Energy Agency and the EU, a model Kaplan turbine especially designed for the low and varying heads and flows has been developed and tested with very promising results. This and 6 new turbines will be installed on the prototype in the ongoing Nissum Bredning project.
The prototype is designed as a 1:1 (full-size) model relativly to the wave climate in Nissum Bredning. This corresponds to 1:4.5 for a North Sea Wave Dragon and a 1:5.2 scale for a Wave Dragon in a 36 kW/m wave climate.
Due to scale effects the rated power will be 20 kW resembling 4 MW when deployed in a relatively low-energy (24 kW/m) wave climate and 7 MW when deployed in a 36 kW/m climate. The prototype activities are expected to establish the necessary knowledge in order to deploy a full-scale offshore Wave Dragon in 2006.
Contact & Information:
Wave Dragon ApS
Blegdamsvej 4
DK-2200 Copenhagen N
Denmark
Phone: +45-35360219 or +45-35370211
Fax: +45-35374537