Mont-Louis Solar Furnace, Solar furnace research facility in Mont-Louis, France
The Mont-Louis Solar Furnace is a research installation in the eastern Pyrenees of France that uses a system of flat and curved mirrors to focus sunlight onto a single point. The heat produced at that focal point can reach levels high enough to melt metals and fire ceramics.
Professor Félix Trombe had this installation built in 1949, making it the first working solar furnace of its kind anywhere in the world. The knowledge gained here later led to the construction of a larger solar furnace in Odeillo, a few kilometers away.
The name Mont-Louis recalls Louis XIV, the Sun King, and visitors often notice how fitting it is that a solar installation stands here. The town and the furnace seem to share the same symbol, the sun, across very different centuries.
Guided tours with live demonstrations are offered regularly, but the demonstrations depend on clear skies and work best on sunny days. It is worth planning your visit for a day with good weather to get the most out of the experience.
The furnace heats materials without touching them or using any chemical fuel, which makes it useful for testing substances that must not be contaminated. This property made it attractive for space research, where materials need to be tested under extreme heat without any outside interference.
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