Sökning: "Offshore wind energy"

Visar resultat 16 - 20 av 53 avhandlingar innehållade orden Offshore wind energy.

1. 16. Aspects of offshore renewable energy and the alterations of marine habitats

   Författare :Dan Wilhelmsson; Sören Nylin; Anders Persson; Stockholms universitet; []
   Nyckelord :renewable energy; biodiversity; wave power; wind power; disturbance; fish; fouling organisms; artificial reefs; zoologisk ekologi; Animal Ecology;

   Sammanfattning : Several Western European countries are planning for a massive offshore renewable energy (i.e. wind and wave energy) development (ORED) along the European Atlantic coast and in the Baltic Sea. LÄS MER

3. 17. Design and Assessment of HVDC Off-shore Wind Turbine Generator

   Författare :Poopak Roshanfekr; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; annual energy efficiency.; permanent magnet assisted synchronous reluctance generator PMa-SynRG ; high voltage direct current HVDC ; wind energy; finite element method FEM ; maximum torque per ampere MTPA ; interior permanent magnet synchronous generator IPMSG ;

   Sammanfattning : In this work, design and assessment of a 5 MW wind energy generator with a gearbox is performed to find an energy-efficient generator for HVDC offshore wind turbines, studying aninterior permanent magnet synchronous generator (IPMSG) as well as a permanent magnetassisted synchronous reluctance generator (PMa-SynRG). Quantities such as torque density,torque ripple, losses and amount of magnet material are studied. LÄS MER

4. 18. A Novel Oil-immersed Medium Frequency Transformer for Offshore HVDC Wind Farms

   Författare :Mohammad Kharezy; Per Olof Hedekvist; Yuriu Serdyuk; Thomas Hammarström; Karsten Backhaus; RISE; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; prototype design methodology; finite element analysis; HVDC insulation design; medium frequency transformer; Wind energy; DC-DC power converters;

   Sammanfattning : In this project, a design of an oil type medium frequency transformer for offshore wind farm applications is proposed. The design is intended for applications when series coupling of the output of the DC/DC converters of the wind turbine on their secondary side is done to achieve a cost-effective high voltage solution for collecting energy from offshore wind parks. LÄS MER

5. 19. Power from the Brave New Ocean - Marine Renewable Energy and Ecological Risks

   Författare :Linus Hammar; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Stereo-video; OTEC; Environmental impact; Ocean thermal energy conversion; Fish; Ecological risk assessment; Wave power; Tidal power; Offshore wind power; Ocean energy;

   Sammanfattning : This thesis address ecological risks associated with the possible growth of marine renewable energy. Tidal power, wave power, ocean thermal energy conversion (OTEC) and currently expanding offshore wind power are likely to become common components of future seascapes. LÄS MER

7. 20. Resource mobilisation for energy system transformation

   Författare :Kersti Karltorp; Chalmers tekniska högskola; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Resource mobilisation; Biorefineries; Energy system transformation; Offshore wind power; Incumbent firms; Competences;

   Sammanfattning : A transition to a sustainable path of development will require that fossil fuels are replaced with renewable energy sources and involve, therefore, a large-scale transformation of the energy system. In the EU, offshore wind power and biorefineries have the potential to play an important role in this transformation. LÄS MER