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20 april 2022
Drijvende windturbines veranderen alles
Om in 2050 een klimaatneutraal land te worden, moet het aandeel opgewekte duurzame energie op zee fors omhoog. Daarin spelen drijvende windturbines, zonnepanelen en getijdencentrales een cruciale rol.
19 april 2022
TU Delft intensiveert onderzoek drijvende windturbines
Als het aan de Europese Commissie ligt, is alle gebruikte energie in 2050 afkomstig uit duurzame bronnen. Maar om dit doel te kunnen halen, moet er – op grote schaal – gebruik worden gemaakt van drijvende windturbines, stelt Axelle Viré, windexpert aan de TU Delft. ‘Hoewel de techniek momenteel nog in de kinderschoenen staat, is de potentie enorm,’ legt Viré uit. ‘En om die potentie te verzilveren, lanceert de TU Delft het Floating Renewables Lab: een labfaciliteit die alle elementen uit de drijvende windturbineketen en andere offshore hernieuwbare energiebronnen, met behulp van numerieke modellen en AI, aan elkaar knoopt.’
05 april 2022
Marcel Stive delivers his last Doctor of Philosophy
On March 31th, Dr. Thu-Ha Nguyen successfully defended her thesis on wave-overtopping processes for very mild sloping and shallow foreshores, supervised by Marcel Stive and Bas Hofland. For Marcel, this was a special occasion, as Thu-Ha was his last PhD in his role of promotor here at TU Delft. Starting back in 2003 with a tall Dutchman who obtained his degree with a thesis on Argus video imaging, Marcel has acted as the promotor of no fewer than 51 PhD candidates, 46 at TU Delft and 5 at other academic institutes.
Sweet solutions to a salty problem
Some sixty kilometres, all the way up to Gouda, that’s how far inland the Rotterdam Waterway has been carrying salty North Sea water over the last few years. Salt intrusion in Dutch rivers is a growing problem for the country’s drinking water supply and agriculture, not only in the Dutch delta but in deltas worldwide. Julie Pietrzak is trying to find better ways of predicting and combating the problem.
Counting grains of sand to understand coastal dunes
The Dutch coastline is continually changing. Coastal engineer Sierd de Vries is using small ventilators, home-made wind tunnels, drones, jet skis and laser scanners to gain an insight into the development of coastal areas and dune formation. He can often be found sitting close to the Sand Motor counting grains of sand. It’s all in aid of providing more accurate predictions of the long-term changes affecting the coastal landscape.
Delft model protects wind turbines from risks posed by sea ice
Researcher Hayo Hendrikse (CEG) has developed a new model that gives accurate calculations of the effects of sea ice on offshore structures, such as wind turbines and oil and gas platforms. It turns out that ice causes less wear and tear in these structures than was previously assumed. Thanks to a successful partnership with Siemens Gamesa, Hendrikse's model is now being used in the construction of new offshore wind farms.
Into the mud to help nature
Intertidal flats: you might know them from the Wadden Sea area, but they can also be found in the south-western region of the Netherlands. An intertidal flat is an area that is underwater at high tide and above water at low tide, explains De Vet. “The water can rise or fall by five metres within six hours. At low tide, this creates small islands and strips along the coast (tidal flats)”. Intertidal flats are of great ecological value. The lugworms, cockles and crabs living in these areas make them an important pit stop for migratory birds.
Can sandbanks save mangrove forests?
Waking up early and going into the field on a small fishermen's boat, while the sun is rising behind volcano tops. That's how days started for PhD student Silke Tas during her two month fieldwork in Indonesia. The rest of her days were less idyllic: they consisted mostly of treading through the mud to get the right measurements for her research. She studies the workings of coastal sandbanks that give a chance to mangrove forests to restore, so that the forests can, in turn, prevent coast erosion.
Waiting for the perfect storm
For months hydraulic engineer Patrick Oosterlo has been waiting for a heavy storm. One that can truly test his equipment that was installed in and on a dike on the coast of the eastern Wadden Sea. He needs high waves and strong winds to decide: is this dike high enough?