In solar thermal power plants, the concentrated solar radiation generates very high temperatures. Therefore the used components have to be particularly heat-proof. Whether they are suitable for the use under extreme temperatures can be tested in advance in the laboratory.
The High Temperature Laboratory Stuttgart (HITS) of the Institute of Solar Research provides a suitable infrastructure for this kind of testing. It enables tests with different heat transfer materials at over 1000 °C. There are various test bench components for the test operation, as well as a measurement data acquisition and a measurement and control hardware, which can be flexibly adapted to the needs of users.
The following test infrastructure is already available:
In a test section hot air flows through the components to be tested. With the help of a compressor, volumetric flows of up to 80 m³/h are possible. The maximum achievable overpressure is 500 mbar. The downstream electric air heater with a heating power of up to 40 kW can heat the airflow up to 1200 °C.
The High Temperature Laboratory Stuttgart has six infrared heaters with a dimension of 150 mm x 230 mm, which can be arranged in any order. The heaters can each be operated with a power of up to 10 kW. They achieve heat flux densities of up to 300 kW/m². The wavelength of the maximum intensity is 1.2 μm. The infrared heaters can be combined with the hot air test loop.
The system can provide a total heating power of up to 100 kW.