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2 Zeszyty Naukowe. Cieplne Maszyny Przepływowe - Turbomachinery / Politechnika Łódzka

2 2014

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EU Norsewind – Delivering offshore wind speed data for renewable energy

Stickland M. T., Oldroyd A., Bay Hasager Ch., Scanlon T.

Zeszyty Naukowe. Cieplne Maszyny Przepływowe - Turbomachinery / Politechnika Łódzka

2014

nr 145

109--114

Offshore wind is the key area of expansion for most EU states in order to meet renewable energy obligations. However, a lack of good quality offshore wind resource data is inhibiting growth in this area. To address this issue the NORSEWInD project was established in 2008 to develop the methodology for creating a wind atlas from remote sensing satellite data which is available in the public domain. This paper gives an overview of the methodology developed and includes the so-called “NORSEWInD standard” for comparing LIDAR and mast wind data, the technique for estimating the flow distortion measured around offshore platforms by LiDARs using wind tunnel and CFD data and observations of the vertical wind profile shear exponent at the hub height of off shore wind turbines.

Concept of multi rotor array for deep off-shore wind turbine

Karczewski M., Domagalski P.

Zeszyty Naukowe. Cieplne Maszyny Przepływowe - Turbomachinery / Politechnika Łódzka

2014

nr 145

61--62

Coastal regions in Norway, Spain, Portugal, Japan or the United States comprise over large water depths (> 50 m) making the installation of typical bottom-fixed offshore wind turbines very difficult and expensive. Floating offshore wind turbines might be a more economic option in order to exploit the high energy potential contained in the offshore winds. According to EU-funded ORECCA R&D project these locations were all identified as Level 1 resource capacity with wind velocities ranging 8-11 m/s at 10 m a.s.l. (above sea level) [1]. Different concepts of floating support structures have already been investigated as for the first HAWT prototype, Statoil’s “Hywind” spar buoy turbine, which has been operated off the cost of Norway since 2009 [2]. However, rising costs of operation and maintenance (O&M) as well as manufacturing of large turbine rotors and generators already seriously impair and will impair this branch of energy engineering in the years to come [3]. To address these problems the paper presents a concept of an innovative floating off-shore multi-rotor array turbine.