Testsing and development of components and systems for commercial solar thermal power plants. The aim is to make solar thermal power plants more efficient. They also test processes for solar water splitting, the production of solar fuels and the use of solar heat in industrial processes.
More than 2,000 movable mirrors (heliostats) cover an area of around ten hectares in front of Jülich’s two solar towers. They catch the sunlight, concentrate it and direct it onto the two solar towers.
In the solar tower power plant, a volumetric receiver at the top of the tower absorbs the concentrated sunlight and uses it to heat the surrounding air to up to 700 degrees Celsius. A steam generator inside the tower uses this to heat water into steam, which drives a turbine that produces electricity via a generator.
https://www.dlr.de/en/research-and-transfer/research-infrastructure/solar-towers-juelich
I don’t think this is what they are directly aiming for with this specific one, but this general idea of a large field of reflectors and a central receiver can be built to store heat for a while. That lets you use solar power overnight
This sort of solar power generally doesn’t compete successfully with regular solar panels in cost, and obviously it can’t just be set up on a bunch of random roofs like panels can. Still, it’s potentially a very useful technology if someone does work out how to make it a bit cheaper or more efficient, and it still generates clean power in the process too
The link explains that this is experimental, and that they are both experimenting with turning water into steam, and then using the steam to generate electricity (I imagine this is kind of like steam engines right?), but they are also experimenting with splitting water, in order to make what they call sun-fuel (i expect this is just hydrogen?)
Yeah, exactly. That’s also how coal, gas, and nuclear power plants work too. Turns out that running steam through a turbine is just a really good way to make power.
You actually can make other fuels with solar power too, and since they’re listing it separately from water splitting I think they might be doing that. It is possible to make hydrocarbon fuels out of CO2 and water (or mlre accurately, carbon monoxide and hydrogen) with the right combination of catalysts and energy. It’s an application of the Fischer–Tropsch process, which has traditionally just been used for converting coal or biomass into more useful forms. So if that’s what they’re doing, they’re taking carbon out of the air and hydrogen out of water and then combining those two into petrol and such, using solar energy for each step of the process
Great! Thanks!