DTU Studieprojekt - Can satellite wind and wave height be used to support operation and maintenance of offshore wind farms

Can satellite wind and wave height be used to support operation and maintenance of offshore wind farms

Udbyder
Vejleder
Sted
København og omegn

• One important challenge related to offshore wind applications is the understanding and monitoring of the combined wind and wave conditions in the region of existing or developing wind farms to support and improve planning, construction and maintenance activities.
  
• Satellite observations over the ocean are now reaching into their third decade, with the last 15 years having a dramatic increase of space borne platforms which has led to the existence of a large and long archive of available data.
  
• Especially altimeters and scatterometers have been some of the first instruments on board satellites to provide consistent monitoring of the ocean state with respect to wind and waves.
  
• The main objective of this project is to investigate the available wind and wave height products and conclude on the best combination to use for further analyses. These will include statistical examination of concurrent wind and wave height conditions in a manner relevant for operation and maintenance activities on offshore wind farms.
  
• evaluating weather windows for operation and maintenance (O&M) activities
• obtaining an overview of prospective sites with high Hs values for wave generator installations
• a combination of wind and wave resource assessment can lead to potential locations for combine wind/wave energy converters.
• literature review regarding satellite altimeters and scatterometers and validation studies
• learning how to obtain and process altimeter data and scatterometer data
• learning how to obtain and process in situ measurements
• perform the altimeter-scatterometer-in situ comparisons
• investigate the possibility of calculating weather windows, as e.g. histograms of wave heights (0.5-3 m) and frequency of wind speeds of certain ranges (2-4, 4-6, 6-8, 8-10, etc m/s), times/seasons with highest waves and highest winds, most frequent wave heights and at which wind speed

Wave height is a key parameter for various applications ranging from ocean modelling for the fishing and shipping industries to design of offshore and coastal structures and marine renewable energy. Measurements of wave height are available from buoys at specific locations but also from satellite altimeters. They are active radar sensors that emit electromagnetic pulses and measure the travel time and strength of the return signal. The significant wave height (Hs), which is defined as the average of the 1/3 largest waves, is inferred from the shape of the return signal.

Similar to wave heights, ocean winds are measured by scatterometers; active radar sensors that emit E/M pulses and measure the part of the signal backscattered from the Earth's surface due to the very small scale waves (~2 to 5 cm).

The project is relevant for offshore renewable energy due to its relevance for:

Forudsætninger
Good skills in programming (at least 1 of Matlab, Python), statistics, handling large datasets, critical thinking, literature reviewing, atmospheric/oceanic physics background

Emneord

• Energi
• Fysik
• Geovidenskab
• Materialer
• Miljø og forurening
• Rumforskning
• Elforsyning
• Energiproduktion
• Vindenergi
• Sensorer
• Geologi
• Isforskning
• Jordens magnetfelt
• Klimaændringer
• Kortlægning og opmåling
• Meteorologi
• Polymerer
• Metaller og legeringer
• Affaldshåndtering
• CO2-udskillelse og CO2-lagring
• Jordforurening
• Klimatilpasning
• Luftforurening
• Miljøkemi
• Spildevand og vandafledning
• Vandforsyning
• Økosystemer
• Astrofysik
• Jordobservation
• Kosmisk stråling
• Rumteknologi og instrumenter
• Satellitter
• Solsystemet

Navn
Ioanna Karagali

Stilling
Seniorforsker

Mail
ioka@dtu.dk

Vejleder-info
Kandidatuddannelsen i Geofysik og Rumteknologi
Vejleder
Ioanna Karagali

ECTS-point
30

Type
Kandidatspeciale

Kandidatuddannelsen i Miljøteknologi
Vejleder
Ioanna Karagali

ECTS-point
30

Type
Kandidatspeciale

Kandidatuddannelsen i Vindenergi
Vejleder
Ioanna Karagali

ECTS-point
30

Type
Kandidatspeciale