Abstract
The contribution of wave energy to the renewable energy supply is rising. To extract a considerable amount of wave power,Wave Energy Converters (WECs) are arranged in several rows or in a ‘farm'. The wake behind each individual WEC in the farm affects the power absorption of its neighbouring WECs.
In this paper wake effects in the lee of a single Wave Dragon WEC and multiple Wave Dragon WECs are studied in a time-dependent mild-slope equation model. The Wave Dragon WEC is a floating offshore converter of the overtopping type. The water volume of overtopped waves is first captured in a basin above mean sea level and then drains back to the sea through hydro turbines.
The wake dimensions behind a single Wave Dragon WEC are investigated for uni- and multidirectional waves. An increasing directional spreading results in a faster wave redistribution behind the WEC. The power absorption of a farm of five Wave Dragon WECs, installed in a staggered grid, is calculated for varying inbetween distances. It is observed that an in-between distance of 2D is preferred, when taking spatial and safety considerations into account.
In this paper wake effects in the lee of a single Wave Dragon WEC and multiple Wave Dragon WECs are studied in a time-dependent mild-slope equation model. The Wave Dragon WEC is a floating offshore converter of the overtopping type. The water volume of overtopped waves is first captured in a basin above mean sea level and then drains back to the sea through hydro turbines.
The wake dimensions behind a single Wave Dragon WEC are investigated for uni- and multidirectional waves. An increasing directional spreading results in a faster wave redistribution behind the WEC. The power absorption of a farm of five Wave Dragon WECs, installed in a staggered grid, is calculated for varying inbetween distances. It is observed that an in-between distance of 2D is preferred, when taking spatial and safety considerations into account.
| Original language | English |
|---|---|
| Title of host publication | Proceedings of the 8th European Wave and Tidal Energy Conference : EWTEC 2009 |
| Publication date | 2009 |
| Pages | 961-972 |
| Publication status | Published - 2009 |
| Event | The European Wave and Tidal Conference (EWTEC) - Uppsala, Sweden Duration: 7 Sept 2009 → 10 Sept 2009 Conference number: 8 |
Conference
| Conference | The European Wave and Tidal Conference (EWTEC) |
|---|---|
| Number | 8 |
| Country/Territory | Sweden |
| City | Uppsala |
| Period | 07/09/2009 → 10/09/2009 |
Bibliographical note
Published on a cd.Keywords
- Farm
- Wave Energy
- Wave Energy Farms
- Wakes
- Wake Effects
- Mild-Slope Equations