Odeillo solar furnace
Odeillo solar furnace is a research facility in Fort-Romeu-Odeillo-Via in the south of France. At 54 m (177 ft) tall and 48 m (157 ft) wide, it is the world’s largest solar furnace.
The furnace was built between 1962 and 1968, and became operational in 1970, used to study materials at very high temperatures.
The furnace consists of a large concave mirror measuring nearly 2,000 sq. m, which reflects sunlight onto a small focal point that reaches temperatures of more than 3,000ºC (5,430ºF). Opposite the mirror are hundreds of flat mirrors angled so that they reflect the sun’s rays onto the mirror.
It is used for several purposes, including melting steel, generating electricity via a steam turbine, making hydrogen fuels, testing re-entry materials for space vehicles, and performing high-temperature metallurgic experiments.
[edit] Related articles on Designing Buildings
Featured articles and news
A safe energy transition – ECA launches a new Charter
Practical policy actions to speed up low carbon adoption while maintaining installation safety and competency.
Frank Duffy: Researcher and Practitioner
Reflections on achievements and relevance to the wider research and practice communities.
The 2026 Compliance Landscape: Fire doors
Why 'Business as Usual' is a Liability.
Cutting construction carbon footprint by caring for soil
Is construction neglecting one of the planet’s most powerful carbon stores and one of our greatest natural climate allies.
ARCHITECTURE: How's it progressing?
Archiblogger posing questions of a historical and contextual nature.
The roofscape of Hampstead Garden Suburb
Residents, architects and roofers need to understand detailing.
Homes, landlords. tenants and the new housing standards
What will it all mean?
The Architectural Technology podcast: Where it's AT
Catch-up on the latest episodes.
Edmundson Apprentice of the Year award 2026
Entries now open for this Electrical Contractors' Association award.
Traditional blue-grey slate from one of the oldest and largest UK slate quarries down in Cornwall.
There are plenty of sources with the potential to be redeveloped.
Change of use legislation breaths new life into buildings
A run down on Class MA of the General Permitted Development Order.
Solar generation in the historic environment
Success requires understanding each site in detail.
Level 6 Design, Construction and Management BSc
CIOB launches first-ever degree programme to develop the next generation of construction leaders.
Open for business as of April, with its 2026 prospectus and new pipeline of housing schemes.
The operational value of workforce health
Keeping projects moving. Incorporating unplanned absence and the importance of health, in operations.