منشور Ad van Wijk

In wind farms there is lots of space between the wind turbines. Large 15 MW wind turbines, with rotor diameters over 200 meters, are more than a kilometre away from each other. In the space between the turbines you can do other things, such as fish farming, floating solar, or farming seaweed. Seaweed is usually cultivated on long lines that hang in the sea. Wind turbines are ideal constructions for the attachment and mooring of these lines. And farming seaweed counters acidification and eutrophication, because it absorbs the nitrogen and phosphorus from the oceans. The use of offshore wind-seaweed-hydrogen production farms to produce the equivalent of all the energy for the entire world (2019: 168,000 TWh/year) in the form of hydrogen, would require a total ocean surface area of 4.3 million km2, 1.2% of total ocean surface. In addition, you remove 3,440 million tonnes of CO2 from the air. If we store all this CO2 or lock it in products, we can additionally reduce global CO2 emissions by about 10%. Read more about seaweed farming between offshore wind farms in the book ‘Green Energy for All, how hydrogen and electricity carry our future’. https://lnkd.in/eJ9Xxk-n Dii Desert Energy / Desertec3.0 International Renewable Energy Agency (IRENA), Hydrogen Europe, KWR Water Research Institute, Delft University of Technology, Kees van der Leun, Jorgo Chatzimarkakis, Frank Wouters, Cornelius Matthes, Els van der Roest, Tomasz A. S., Axelle Viré, Dominic von Terzi, Ernst van Zuijlen, Zofia Lukszo, Samira Farahani, David de Jager, Laurens De Vries, Maximilian Kūhn, PhD, Michel Heijdra, Omar Ibrahim, Sandor Gaastra, Cora van Nieuwenhuizen, Louise E.M. Vet, Rene Peters, Diederik Samsom, Alexandra van Huffelen, Timur Gül, Dolf Gielen, Carol Xiao, Andreas ten Cate, Nienke Homan, Noé van Hulst, Antonio Jarquin Laguna, Andre Faaij, Gilbert Gouverneur, Eicke R. Weber

Offshore solar energy becomes interesting due to innovative floating structures. Ocean Sun developed a floating structure for solar energy derived from fish ponds in the Norwegian fjords: solar panels are held together with a hydro-elastic membrane, which, for mooring, is enclosed by a rigid, circular frame. Because the membrane is in contact with the underlying water, it cools the solar panels. Direct cooling from water results in up to 10% higher energy yield compared to ground-mounted solar systems. In addition, the membrane allows the solar panels to accompany the wave motion, so that the wind resistance is minimized. This configuration can withstand wind speeds up to 275 km per hour, which is comparable to the wind force of a hurricane. And there are many interesting offshore combinations possible for electricity, hydrogen, food and materials production. For example combine with floating wind turbines, seaweed farming, fish ponds or sargassum barriers. Read more about floating solar and wind energy, sargassum and seaweed farming as a source of food, materials and energy in the book ‘Green Energy for All, how hydrogen and electricity carry our future’. https://lnkd.in/eJ9Xxk-n Dii Desert Energy / Desertec3.0, International Renewable Energy Agency (IRENA), Hydrogen Europe, KWR Water Research Institute, Delft University of Technology, Kees van der Leun, Jorgo Chatzimarkakis, Frank Wouters, Cornelius Matthes, Els van der Roest, Tomasz A. S., Axelle Viré, Dominic von Terzi, Ernst van Zuijlen, Zofia Lukszo, Samira Farahani, Alice Krekt, David de Jager, Laurens De Vries, Maximilian Kūhn, PhD, Michel Heijdra, Omar Ibrahim, Sandor Gaastra, Cora van Nieuwenhuizen, Louise E.M. Vet, Rene Peters, Diederik Samsom, Alexandra van Huffelen, Timur Gül, Dolf Gielen, Carol Xiao, Andreas ten Cate, Nienke Homan, Noé van Hulst, Antonio Jarquin Laguna, Andre Faaij, Gilbert Gouverneur, Eicke R. Weber, Ocean Sun, Roebyem Anders

To prevent sargassum seaweed from washing ashore, it has to be collected at sea. This can be done, by installing a barrier in the water. Seaweed collected in the sea is fresh, not rotting and soiled with sand. Of course it is still a mixture of different sargassum species and sometimes contaminated. Such a mix is not appropriate for food production, but it can be used to make products or energy Barriers have been installed at a number of places in the Caribbean, primarily in tourist areas. Specialized barges can collect between 50 and 500 tonnes of sargassum per day. Read more about sargassum and seaweed farming as a source of food, materials and energy in the book ‘Green Energy for All, how hydrogen and electricity carry our future’. https://lnkd.in/eJ9Xxk-n International Renewable Energy Agency (IRENA), Hydrogen Europe, KWR Water Research Institute, Delft University of Technology, Kees van der Leun, Jorgo Chatzimarkakis, Frank Wouters, Cornelius Matthes, Els van der Roest, Jos Boere, Tomasz A. S., Axelle Viré, Dominic von Terzi, Ernst van Zuijlen, Zofia Lukszo, Paulo Partidario, Samira Farahani, Alice Krekt, David de Jager, Laurens De Vries, Maximilian Kūhn, PhD, Michel Heijdra, Omar Ibrahim, Sandor Gaastra, Cora van Nieuwenhuizen, Louise E.M. Vet, Rene Peters, Diederik Samsom, Alexandra van Huffelen, Timur Gül, Dolf Gielen, Marieke Abbink-Pellenbarg, Carol Xiao, Andreas ten Cate, Nienke Homan, Noe Van Hulst, Antonio Jarquin Laguna, Andre Faaij, Gilbert Gouverneur, The World Bank