In an interview with CSP Today, Dr. Nicolas Calvet, who leads the Masdar Institute's thermal energy storage research group, talked about the design of Masdar's 100 kW solar platform. The experimental "beam-down" solar concentrator in Abu Dhabi is being retooled to demonstrate the feasibility of a more cost-effective and flexible TES solution.
The new design, which brings light into a ground-level tank, has a number of advantages.
"You don’t pump the molten salts up the tower," he noted. "You don't need pump, pipes, you don't need electrical tracing to avoid the freezing in the pipes. You reduce a lot parasitic energy consumption by not moving molten salt in pipes. And you have direct absorption between the concentrated light and the salt in the tank.
"Instead of two tanks there’s only one tank. There is a moving divider plate inside it separating the upper part which should be hot and the lower part which should be cold. When you charge your system, this plate is moving down and you have only hot salts. And when you discharge, the plate is moving up and you have only cold salts."