> some sort of high heat capacity bricks..., the matter of maintenance was forgotten. Tangent: Startup Andora Energy claims to have solved the maintenance prob

> some sort of high heat capacity bricks..., the matter of maintenance was forgotten. Tangent: Startup Andora Energy claims to have solved the maintenance problem with some novel carbon bricks. Further: Their next gen product plans to use thermophotovoltaics, converting heat into electricity, directly. That'd be spiffy.