Giant electric boiler energized by wind and solar in the Netherlands – pv magazine International
The Swedish energy company Vattenfall is planning to build a 150 MW electric boiler near Amsterdam as part of the Dutch SDE + program for large renewable energies. The system should be operated when a lot of electricity from wind and sun is available and supplies households in the city and the surrounding area with hot water.
June 3, 2021
The Swedish energy company Vattenfall has announced that it has received planning permission and subsidies from the Dutch government as part of the SDE + program for a 150 MW electric boiler to be installed in an existing gas-fired power plant in Diemen near Amsterdam.
“The final investment decision is planned for mid-2022, after the recently launched tender has been completed,” said a statement from the company.
The huge boiler, which Vattenfall referred to as a kind of kettle, is supposed to convert electricity into heat and supply households in Amsterdam and the surrounding area with water. “The electric boiler only switches on when the electricity mix is sustainable, with a lot of electricity from sun and wind,” said the company, without specifying the threshold of solar and wind production above which the mix would be considered sustainable. “If the green electricity is not enough, the gas-fired power plants in Diemen are still needed to generate electricity – power plants that also provide heat very efficiently.”
The kettle will also be able to store heat in a special buffer that is included in its design, which the company calls a large thermos. “In this way, we prevent additional use of the systems [of] Natural gas and thus unnecessary CO2 and nitrogen emissions, ”explained Vattenfall further. The heat buffer is 50 meters high, 26 meters wide and has a volume of 22,000 m3. Up to 125 degrees Celsius hot water can be stored there under pressure and then used for district heating.
The dimensions of the boiler house are approx. 20x30m and tThe maximum height of the building is approx. 15 m. An electric boiler has a diameter of approx. 3.5 m and a height of 6.5 m. The building will have space for three electric boilers.
According to the Swedish company, the electric boiler should provide around 15% of the heat in the Amsterdam region. “However, given the growing number of wind and solar parks in the Netherlands, the number of operating hours of the electric boiler will increase in the coming years,” she said, noting that the system may also Support the electricity grid by keeping the supply and demand for electricity in balance.
Several attempts are currently being made in the Netherlands to combine excess solar and wind power with heating applications. The Dutch association of national and regional electricity and gas network operators, Netbeheer Nederland, plans to use up to 2 million hybrid heat pumps by 2030.
In addition, the Dutch transmission system operator Tennet, which also serves Germany, said in January that it was planning to create flexible electricity demand and reduce network bottlenecks by promoting the use of more intelligent heating systems and heat pumps that can also be operated with solar and wind energy.
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