Latest / RENEWA Sanierungsnavigator / Wärmenetze aus Sonnenenergie – so geht Wärmeversorgung auch
Transcript
- RENEWA GmbH: When we about heat networks, many first think of large power plants, industrial heaters or perhaps even huge heat pump. The heat can from a source that to for the sun. Because solar energy, generated only electricity, large solar thermal systems, can water and this heat directly into close or far-fetched heat networks. In principle, works similarly to a solar thermal system on a family house, only in completely different size. In September 2026 there are 75 solar heating networks Together they to a collector area of about 339,000 square meters and a thermal power of 222 megawatts. There particularly much movement in past year, 2025, 11 new systems to grid. Together they a collector of almost 70,000 square meters. The size of in Stralsund, where collect than 24,000 square meters of vacuum tube collectors for solar heating. Other larger plants were others in Tübingen, Bracht and Delitzsch, but also in Föhr, Regensburg or Dresden, solar energy is for heat supply. In 2026, only two new plants were but they have in them. The new solar thermal plant in Leipzig-Lausen alone has a collector area of about 65,000 square meters And I think we need a comparison. And when we comparison of areas, then we use what most people can Football fields. These new football fields. And this the facility in Leipzig Lausen the largest solar thermal plant in Germany. This also quite well in which direction the market is It's not just about many small pilot projects. Solar heat networks are becoming increasingly larger and can really contribute to supply of the whole district and municipalities. Of the main argument of critics is that the sun seems in winter, so exactly when there of That is solar thermal is usually with other heat sources and large storage systems. That means that heat generated in can be stored and used So solar thermal energy does not the entire heat network alone. But it can ensure that other energy sources have much less. And it is also that technology is only for residential buildings. In Bad Rappenau and Dettenhausen, large solar thermal systems also heat for industrial processes. Such applications could even more important especially where a large amount of heat is needed And the next projects are in the starting holes. Seven more systems are currently in planning or construction, including in Steierberg, Bergrat and Lübeck, where collector areas of 12,000 and 14,000 square meters In total, the new projects should another 53,000 m2 of area and 32 MW of Nevertheless, we the long-term goal. A study for future of the heat dissipation is based on the solar thermal could around 4 TWh of per year For around 10 million m2 of area would necessary. For comparison, today is only 339,000 m2. To achieve 500.000 m² of should added every So, this much more the total area that is installed Solar heating networks will our heating supply. This remote heating can be much more versatile than you think. A heating network does not have to be to power plant and exclusively with industrial heating. It can from large solar panels, heat points, geothermal energy and regional sources. The right mix is And that is perhaps the most important insight for this episode. There is a single solution for all cities and municipalities There are much more possibilities than many people think and sometimes one of simply directly under the sun.