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KArlsruhe Liquid Metal LAboratory, KALLA

Warmly welcome at the web pages of Karlsruhe Liquid Metal Laboratory KALLA. With these pages, we want to give you an impression of our work.

Please do not hesitate to contact us, if you have any question:




Our work focuses on the following two topics:

Thermal hydraulics of liquid metals

At KALLA, various experiments are carried out in order to characterize and better understand the physics of flow and heat transfer in molten metals, which differ significantly from those of conventional liquids like water or air. The experiments reach from generic arrangements to complex geometries from real world applications. As test fluids Lead, Lead-Bismuth, Sodium and eutectic Indium-Gallium-Tin mixtures are used. At KALLA, we operate several liquid metal loops, from lab to pilot scale. Comprehensive liquid metal-specific measuring equipment is being qualified and developed at KALLA. => more


Liquid metal technology for concentrating solar thermal power plants

Concentrating solar thermal power plants represent a promising option for the use of renewable energies. Here, the incident solar radiation is concentrated at a so-called receiver surface, which is cooled by a heat transfer medium. Due to the outstanding heat transfer properties of molten metals under these conditions, the application of liquid metals for concentrating solar power plants is investigated. In particular, we look at liquid metal-specific modifications of design rules for receivers, heat exchangers, pumps, the very important aspect of thermal storage and other key components. Operational experience is gained and experiments are conducted in a solar furnace, called SOMMER.

=> More on concentrating solar power and liquid metals

=> More on SOMMER


Prof. Dr.-Ing. Thomas Wetzel
Tel. 0721/608-46447