The particle receiver prototype was designed and built at DLR Stuttgart. It has an aperture area of about one square metre and a design power level of 2.5 MWth when installed in the test platform of the Juelich Solar Power Tower.
The receiver was installed at a height of 26 metres, about half-way up the tower. It was successfully tested in 2018 under solar conditions and a particle outlet temperature of up to 965°C was demonstrated. This result even surpassed the targeted temperature of 900°C.
Stationary data points during receiver operation were evaluated and compared with a simulation model, showing good agreement. The evaluated test data were in the range of 700°C particle outlet temperature. Due to the higher outlet temperatures, operation conditions were not stationary. Therefore no comparison with simulation was made.
The prototype was tested with an electric heater up to 700°C. The dimensions of the receiver correspond to a small commercial scale.
DLR CC-By 3.0.
Small ceramic particles are ideally suited for converting solar radiation into high temperature heat and for storing it.
DLR (CC-BY 3.0).
In Juelich DLR operates Germany’s unique experimental solar thermal tower plant, the Solar Tower Juelich. More than 2,000 mirrors concentrate the sunlight and reflect it to the central receiver on top of the tower. Halfway up the tower a research facility is located, designed to host test installations for limited time periods. From September 2017 to June 2018, the CentRec receiver was tested here under solar conditions.
The receiver made its journey from DLR-Stuttgart to Juelich on a lorry trailer.
DLR (CC-By 3.0).
A crane lifted the receiver up to the tower’s research facility.
A bright spot is visible where the solar radiation is targeted to the receiver. The results of the test period surpassed the targeted temperatures of 900°C by achieving up to 965°C.