World's First Wind-Hydro Farm Supplies Power Even When There's No Wind
Germany will soon be home to a groundbreaking wind farm that solves a big problem with wind power: What happens when the wind isn't blowing?
General Electric's (GE) renewable energy arm has signed a turbine-supply agreement with German construction company Max Bögl to develop the world's first wind farm with an integrated hydropower plant capable of generating power even when there's no breeze.
According to GE Reports, project "Gaildorf" consists of four wind turbines scattered along a hill in the Swabian-Franconian Forest. These towers are unique in two ways. First, they will stand at a record-breaking height of 584 feet once built. Second, at the base of each tower is a water reservoir containing 1.6 million gallons of water. The four towers are daisy chained by a channel that takes water down a valley to a 16-megawatt pump/generator hydropower plant. The site will house another reservoir holding 9 million gallons of water for additional water storage.
Here's how it all works, as GE Reports simply explains:
"The big idea here is that the wind will generate electricity when it's, well, windy, and the water will act as a giant battery that will discharge and modulate output when it stops blowing.
"When electricity is needed, water flowing downhill from the reservoirs will power the hydro plant. When the energy supply is high, the hydro plant will pump the water back up the hill to the reservoirs and will act as the giant battery."
The four wind turbines are connected by a channel that takes water down to a hydro plant.GE Reports
The beauty of this project is that stored hydropower can offset the unpredictability of wind power.
"The Gaildorf project marks a major step forward in balancing power demand and supply fluctuations using renewable energy sources," GE said in a statement. "The combined wind and hydropower plant will provide balancing power for fast-response stabilization of the grid, maintaining a low cost of electricity for residents in Germany."
The wind farm alone will generate 13.6 megawatts of energy while the hydropower plant can generate 16 megawatts. The turbines are scheduled to be commissioned by the end of 2017. The Gaildorf project is expected to be fully operational by the end of 2018.
“We are very excited to collaborate with Max Bögl on this pilot project; a first for the industry," Anne McEntee, president and CEO of GE's Onshore Wind business, said. "We are committed to exploring innovative renewable energy technologies that have the potential to improve grid flexibility in Europe and around the world."
These 5 European countries are leading the way in #RenewableEnergy http://t.co/so2JkQl4vL via @EcoWatch http://t.co/9cPvwsgLS4— Rainforest Alliance (@Rainforest Alliance)1421177449.0
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By Harry Kretchmer
By 2030, almost a third of all the energy consumed in the European Union must come from renewable sources, according to binding targets agreed in 2018. Sweden is helping lead the way.
Sweden is a world leader in renewable energy consumption. Swedish Institute/World Bank
Naturally Warm<p>54% of Sweden's power comes from renewables, and is helped by its geography. With plenty of moving water and 63% forest cover, it's no surprise the <a href="https://sweden.se/nature/energy-use-in-sweden/#" target="_blank">two largest renewable power sources</a> are hydropower and biomass. And that biomass is helping support a local energy boom.</p><p>Heating is a key use of energy in a cold country like Sweden. In recent decades, as fuel oil taxes have increased, the country's power companies have turned to renewables, like biomass, to fuel local 'district heating' plants.</p><p>In Sweden these trace their <a href="https://www.sciencedirect.com/science/article/pii/S0360544217304140#fig3" target="_blank">origins back to 1948</a>, when a power station's excess heat was first used to heat nearby buildings: steam is <a href="https://www.sciencedirect.com/topics/engineering/district-heating-system" target="_blank">forced along a network of pipes</a> to wherever it's needed. Today, there are around 500 district heating systems across the country, from major cities to small villages, providing heat to homes and businesses.</p><p>District heating used to be fueled mainly from the <a href="https://www.sciencedirect.com/science/article/pii/S0360544217304140" target="_blank">by-products of power plants</a>, waste-to-energy plants and industrial processes. These days, however, Sweden is bringing more renewable sources into the mix. And as a result of competition, this localized form of power is now the country's<a href="https://www.sciencedirect.com/science/article/pii/S0360544217304140#fig3" target="_blank" rel="noopener noreferrer"> home-heating market leader.</a></p>
Sweden is using smart grids to turn buildings into energy producers. Huang et al/Elsevier
Energy ‘Prosumers’<p>But Sweden doesn't stop at village-level heating solutions. Its new breed of energy-generation takes hyper-local to the next level.</p><p>One example is in the city of Ludivika where 1970s flats <a href="https://www.buildup.eu/sites/default/files/content/transforming-a-residential-building-cluster-into-electricity-prosumers-in-sweden.pdf" target="_blank">have recently been retrofitted with the latest smart energy technology</a>.</p><p>48 family apartments spread across 3 buildings have been given photovoltaic solar panels, thermal energy storage and heat pump systems. A micro energy grid connects it all, and helps charge electric cars overnight.</p><p>The result is a cluster of 'prosumer' buildings, producing rather than consuming enough power for 77% of residents' needs. With <a href="http://www.diva-portal.org/smash/get/diva2:1232060/FULLTEXT01.pdf" target="_blank" rel="noopener noreferrer">high levels of smart meter usage</a>, it's a model that looks set to spread across Sweden.</p>
<div id="d7bf9" class="rm-shortcode" data-rm-shortcode-id="8757b138d5570bec9d6aad18074a429a"><blockquote class="twitter-tweet twitter-custom-tweet" data-twitter-tweet-id="1273556364263071744" data-partner="rebelmouse"><div style="margin:1em 0">Read more about Western Harbour and book a visit: https://t.co/ujSmVs9rNK 🏡🌳🌊 https://t.co/C5PuPziqIM</div> — Smart City Sweden (@Smart City Sweden)<a href="https://twitter.com/SmartCitySweden/statuses/1273556364263071744">1592474473.0</a></blockquote></div>
Scaling Up<p>A recent development by E.ON in Hyllie, a district on the outskirts of Malmö, southern Sweden, <a href="https://www.eonenergy.com/blog/2019/February/sweden-smart-city" target="_blank">has scaled up the smart grid principle</a>. Energy generation comes from local wind, solar, biomass and waste sources.</p><p>Smart grids then balance the power, react to the weather, deploying extra power when it's colder or putting excess into battery storage when it's warm. The system is not only more efficient, but bills have fallen.</p><p>Smart energy developments like those in Hyllie, Ludivika, and renewable-driven district heating, offer a radical alternative to the centralized energy systems many countries rely on today.</p><p>The EU's leaders have a challenge: how to generate 32% of energy from renewables by 2030. Sweden offers a vision of how technology and local solutions can turn a goal into a reality.</p>
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