Engineering, procurement, construction and installation of suction bucket type of turbine foundation(s) for an offshore wind farm in average water depth of 23 meters in the Netherlands
Contracting Entity has obtained a concession for the construction of an offshore wind farm in the Dutch Exclusive Economic Zone in the Q10 sector.
The Q10 project has obtained a subsidy from the Dutch authorities under the provision that innovative elements will be included in the Wind Farm such as for example suction bucket foundations.
The base case for the Q10 Offshore Wind Farm consists of 43 Vestas V112 Wind Turbine Generators (WTG's) on monopile foundations which are connected via medium voltage cables to an Offshore High Voltage Station (OHVS).
In the event an innovative foundation type such as a suction bucket foundation is being installed at Q10 the number of monopiles will be reduced to a minimum of 41; hence up to a maximum of 2 suction bucket foundations would be considered to be implemented at Q10 site.
Depending on the result of the tender proposals Contracting Entity may decide not to implement suction bucket foundations at Q10 site at all.
The foundations for the WTG's shall be designed, fabricated and installed (EPCI) in accordance with DNV-OS0J101 (design for Offshore Wind Turbine Structures). Any proposed deviations from this standard and its guidance notes shall be indicated and agreed upon with certifying party and with employer in writing, prior to contract award. The economic operator shall be obliged to conduct extensive structural monitoring (including scour measurements) during the first 5 years of its operational lifetime. The monitoring results shall be reported to the Contracting Entity on a monthly basis. Monitoring format to be further determined.
The foundation shall be an integrated structure including the structure from the foundation within the soil up to and including the tower flange.
The foundation comprises one (1) or more suction elements. The suction elements may be piles, cans or buckets.
Installation of the foundation is achieved by applying suction to the foundation elements, utilising the hydrostatic pressure difference to force the elements into the soil.
1 (base case) up to 2 suction bucket foundations suitable for Wind Turbine Generators are considered to be designed, fabricated and installed at the Q10 Offshore Wind Farm site. The foundations shall have an operational lifetime of at least 20 years.
The Q10 offshore wind farm is located in the Dutch EEZ, approximately 23 km from shore near the coastal town Noordwijk.
The Q10 Wind Farm is located in water depths of 19-24 m LAT and with sandy soil conditions.
Qualified candidates will be informed during ITT process about the exact locations within the Wind Farm where installations of suction bucket foundations are considered.
Deadline
De termijn voor de ontvangst van de offertes was 2012-01-05.
De aanbesteding werd gepubliceerd op 2011-12-15.
Wie?
Wat?
Waar?
Aankoopgeschiedenis
| Datum |
Document |
| 2011-12-15
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Aankondiging van een opdracht
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| 2012-01-12
|
Aanvullende inlichtingen
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| 2012-06-06
|
Aanvullende inlichtingen
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