FRENELL CSP plant concepts are based on three key components – the solar array, the thermal energy storage system and the power plant block.
The collector system designed by FRENELL comprises flat, glass-based reflectors which are focused together onto a fixed, linear receiver. Vacuum-insulated absorber tubes are fitted in the focal line, in which molten nitrate salt is warmed to as much as 550 °C.
The modular design of the collector allows almost continuous adjustment of the solar array sizes to the demand for solar energy or the site area of a project. The gradient of up to 6 % helps to minimise or even eliminate the need for earthworks on hilly ground.
Thermal storage tanks based on liquid salts - by FRENELL
Thermal energy storage systems from FRENELL are based on molten nitrate salts. The liquid salt heated in the solar array during the day is buffered in insulated tanks known as “hot salt storage tanks”. From there, pumps move the liquid salt through heat exchangers, thereby generating hot steam. The liquid salt that is cooled as part of the process is fed back to the cold salt storage tanks before being pumped through the solar array again the next day. Once there, it is heated to the target temperature and returned to the hot salt storage tanks.
Maximum grid-friendly control
CSP power plants from FRENELL deliver an incomparably high contribution to electricity grid stabilisation and to their failsafe performance in what is an increasingly challenging environment.