Direct wind-to-heat conversion
Converting wind energy into a stable heat source via eddy current
Exhibitors
Location
Hall 11, Stand B06
Description
Wind is one of the most frequently used renewable energy sources. However, its use is heavily dependent on the weather. The challenge is to convert fluctuating wind energy into a stable energy source. This is usually done using an intermediate storage facility as a buffer. There are various methods to store mechanically generated energy from wind turbines. However, they require conversion steps that require additional energy, equipment and high investments. Researchers at the Institute for Neutron Physics and Reactor Technology (INR) at KIT have invented a device that converts mechanical energy from wind or water turbines directly into CO2-neutral high-temperature heat. The device consists of a series of magnets or magnetic field generators that are attached to the rotor or gearbox of a wind turbine via a bracket. Pipes filled with a conductive fluid – such as molten salt or liquid metal – complete the device. While the magnets connected to the turbine rotate, the pipe system is static. The movement of the magnets results in variable magnetic fields in the conductive fluid. The continuous change in magnetic flux generates eddy currents, which heat up the liquid. Thus, it is a heat source and transport medium. With this direct conversion of "Wind2Heat", temperatures of over 600 degrees Celsius can be achieved. By using it as process heat in energy-intensive industries and the production of synthetic fuels using high-temperature co-electrolysers (Power-to-X processes), their CO2 footprint is reduced. Combined with a thermal energy storage system, the heat can also be converted into electrical energy at any time and thus contribute to more stable electricity production from renewable resources. KIT is looking for companies from the energy sector to realize pilot projects with direct wind-to-heat conversion via eddy current.
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Karlsruher Institut für Technologie (KIT)
- Kaiserstr. 12
- 76131 Karlsruhe
- Germany
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