DeepResource

Observing the world of renewable energy and sustainable living

Two-Blade Wind Turbines Are Back, This Time Offshore

Why three blades if two blades work as well? It is all the fault of 1970s Danish garage pioneers, who insisted there needed to be three blades. NASA did experiment at the same time with 2-blades (WTS-4), but that project was cancelled under Reagan, who decided that oil was American, not wind. And now we are stuck with three blades.

Or are we? The originally Dutch company Sea Wind Technology is betting on two-blades, especially for offshore, with higher wind speeds (higher loads) and more difficult installation.

Advantages two blades:

– simpler design
– less material (50% less weight, no heavy tower/monopiles necessary)
– easier offshore transportation and mounting (just pile them up)
– simpler installation vessels, flat barges suffice
– more rotor flexibility, 2 degrees of freedom: rotating and teetering, reducing load
– 2% less electricity gain, but offset by much lower installation and operational cost
– Levelized cost (LCOE) reduction: 50%

[seawindtechnology.com] – Company site
[linkedin.com] – Two-bladed offshore turbines could cut the cost of energy by 50%
[linkedin.com] – Why two blades are better than three for floating wind turbines
[crunchbase.com] – Seawind Ocean Technology
[windpowermonthly.com] – Are three blades really better than two? (2011)
[interestingengineering.com] – The Scientific Reason Why Wind Turbines Have 3 Blades

Offshore wind hub Eemshaven in the Netherlands. After [1:30] you see an (onshore) two-bladed windturbine in operation.

[gic.nl] – Nieuw type windmolen met slechts twee wieken getest in Eemshaven

Read more…

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Boskalis Monopile Scour Protection

[wikipedia.org] – Boskalis

[source]

Solar Panel Array Automatic Cleaning

This is NOT what you want, because of the water:

Live Energy Production Data

[gridwatch.co.uk] – UK

Price of Hydrogen Production via Electrolysis

[Source]

It was the old idea of the hydrogen economy (first use term: 1970): intermittent renewable electricity in –> hydrogen out. Storage problem solved. The idea got discredited for cost reasons. These reasons are no longer valid and hydrogen is making a come-back.

Basic fact: It takes about 50 kWh of electrical energy to electrolyze 9 liters of water to obtain 1 kg of Hydrogen.

Price hydrogen from electrolysis: 2-3 euro/kg

Energy density (MJ/kg):
Hydrogen: 143
LNG: 56
Diesel: 48
Gasoline: 46

[carboncommentary.com] – Hydrogen made by the electrolysis of water is now cost-competitive
[wikipedia.org] – Hydrogen Economy
[opwegmetwaterstof.nl] – Veel wegen leiden naar waterstofeconomie

Noah Recyclable Car

Students of the Technical University of Eindhoven in the Netherlands have developed a “100% recyclable car”.

Should be on the road by the end of 2018.

Made from flax fiber and sugar.
Elektromotor 15 kW, 6 x 10 kg batteries.
Speed 100 kmh
Range 240 km
Not suitable for a first date.

[tuecomotive.nl] – Official site
[cursor.tue.nl] – TU/ecomotive leaves Eco-marathon behind with ‘circular’ Noah
[spiegel.de] – Dieses Auto soll sich komplett recyceln lassen

Geothermal Energy in the Netherlands

[Source]

[rvo.nl] – Dutch government overview of geothermal projects in the Netherlands
[wikipedia.org] – Geothermal Energy

Cleaning the Oceans from Plastic

Swiss, Dutch and American initiatives to clean up the world’s oceans from plastic, mainly originating from Asian rivers.

[theseacleaners.org] – SeaCleaners
[wikipedia.org] – Ocean Cleanup
[theoceancleanup.com] – Ocean Cleanup
[dw.com] – Almost all plastic in the ocean comes from just 10 rivers

Netherlands – Natural Gas Connections Prohibited in Newly Built Homes

[officielebekendmakingen.nl] – Official Dutch government announcement that as of July 1, 2018, it is forbidden to connect newly built homes to the national natural gas grid.

[volkskrant.nl] – Dutch national newspaper is afraid that the government is pushing too hard with the transition and is running the risk of putting too much burden on society. Heat pumps (6-20k) and solar panels (5k) don’t come cheap as compared to gas heating (2k).

N.B. the solution could be public/private financing/renting schemes over 10-30 years. Heat pumps earn themselves back in 7-14 years. Solar panels in 6-9 years.

NordLink – Connecting Germany and Norway

[wikipedia.org] – NordLink

E-Road, E-Vehicles Breakthrough in Sweden?

2 km of rail has been embedded in a road near Stockholm, capital of Sweden. Purpose: offering the infrastructure required to charge vehicles while they are driving, reducing the need for have batteries. If the entire Swedish highway network of 20,000 km would be equipped with these kind of rails, batteries would only be needed to bridge a maximum of 45 km, reducing the size of car batteries with a factor of 5-10.

[eroadarlanda.com] – E-road Arlanda
[theguardian.com] – World’s first electrified road for charging vehicles opens in Sweden
[Google Maps]

MeyGen Tidal Power

MeyGen is the worlds largest tidal energy plant which is currently in construction. The project uses four 1.5 MW turbines with 16m rotor diameter turbines submerged on the seabed. The project is owned and run by Tidal Power Scotland Limited and Scottish Enterprise. The high speed of currents in the area, reaching up to 5 metres per second (11 mph), made the chosen site in the Pentland Firth well suited to this type of energy generation… In December 2016 it was announced that the first turbine had begun full power operations, and all four turbines were installed by February 2017. Atlantis plans for 400 MW.

[wikipedia.org] – MeyGen

[atlantisresourcesltd.com] – Company site
[theguardian.com] – World’s first large-scale tidal energy farm launches in Scotland

1-2 GW Tidal Power Plans in France

[Source]

Atlantis Resources Limited has submitted a strategic plan to the French government that includes a goal to deliver 1 GW of tidal power by 2025 at Le Raz Blanchard in France. The company recently completed a study that concludes 2 GW of tidal energy is immediately available to be harnessed at this site in Normandy and 1 GW could be operational by 2025, with potential to create up to 10,000 jobs and attract more than €3 billion (US$3.65 billion) of CAPEX investment.

[hydroworld.com] – Atlantis announces plans to deliver 1 GW of tidal power by 2025
[4coffshore.com] – Raz Blanchard Tidal Project
[renewableenergymagazine.com] – Atlantis Study identifies 2 GW of tidal energy
[wikipedia.org] – Alderney Race

Overview Pumped Hydro Facilities in Europe

Goldisthal, largest PHS facility in Germany. Completed in 2004, 1060 MW, 8.5 GWh, 12/19 million m3 (upper/lower), 600 million euro.

[lirias.kuleuven.be] – An overview of large-scale stationary electricity storage plants in Europe [2015]
[setis.ec.europa.eu] – Europe to experience pumped storage boom [2013]

[wikipedia.org] – Bath County Pumped Storage Station [USA]
Largest PHS facility in the world: 1985, $1.6B, 79% efficiency, 44 million m3, 3060 MW, 44 GWh, Voith-Siemens.

[wikipedia.org] – List of pumped-storage hydroelectric power stations
(world-wide, over 1000 MW)

Can Norway Serve as Europe’s Battery Pack?

[Source]

Arguments pro and con.

[greentechmedia.com] – Why Norway Can’t Become Europe’s Battery Pack
[greentechmedia.com] – The Debate Over Norway’s Ability to Become a Hydro Battery for Europe Is Surprisingly Robust
[greentechmedia.com] – Norway Could Provide 20,000MW of Energy Storage to Europe

Dutch Company TenneT Plans 30 GW Offshore Wind Park

Dutch grid company TenneT is working on a serious plan to build a giant wind park of 30 GW in the middle of the North Sea, on the Dogger Bank, around a to-be-build artificial energy island (€1.5 billion), that is supposed to work as a power hub to distribute wind power to the surrounding countries Holland, Britain, Norway, Denmark and Germany. The island could be completed as early as 2027. The wind park will dwarf anything we have seen so far in the realm of offshore wind (think 630 MW).

[theguardian.com] – Is this the future? Dutch plan vast windfarm island in North Sea
[businessinsider.com] – The Dutch plan to build the world’s biggest wind farm
[wikipedia.org] – Dogger Bank

Read more…

“Coming 10-15 Years Offshore Wind Will Be Booming”

Key figures power production The Netherlands

Average power consumption: 13 GW
Total power capacity: 29 GW
Size coming generation turbines: 8 MW nameplate power
North offshore capacity factor: 50% nameplate power

In other words: the Netherlands needs to install 13 GW / 8 MW / 0.50 = 3250 offshore 8 MW wind towers.
Modern jack-up vessels like the Aeolus (see video below) can install a single wind tower per 24h.
In other words, the energy transition of the Netherlands can in theory be accomplished within 10 years with a single jack-up ship. Dutch companies have several of these ships operational.

The bottle neck is not installing the monopiles but storing the generated wind power and convert it into H2 or NH3.

[offshorewind.biz] – Sif Gathers Steam in 2017

EU Storage Programs

[store-project.eu]
[eera-set.eu] – European Energy Storage Technology Development Roadmap Towards 2030 –
UPDATE
[ec.europa.eu] – Energy storage
[store-project.eu] – stoRE – Final Publishable Report (pdf)
[store-project.eu] – Facilitating energy storage to allow high penetration of variable Renewable Energy (pdf)
[setis.ec.europa.eu] – Mapping of energy storage innovation in Europe

[wikipedia.org] – International storage projects

De-icing Wind Turbines

XEV LSEV, 3D-printed E-Vehicle for $7.5k

Range 150 km, weight 450 kg, max speed 72 kmh.

[cleantechnica.com] – Finally, Your Next Car Could Be A 3D-Printed Electric Car — Only $7,500 & Can Be Built In 3 Days

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