Dual Use Solar; Red for Algae & Green & Blue Solar Thermal

Since the temperature limits of materials not the possible
concentration factor of the sun limits solar thermal it would be
possible to split the spectrum into red for algae and blue and green
for solar thermal.

The concentrator would reflect blue and green light to the heat
engine's collector and transmit the red light for the algae tanks.

The concentration factor [size of the reflector] is then increased
accordingly to maintain the same high temperature for the heat engine.

The overall efficiency is lower than pure solar thermal but you get
some desperately needed liquid fuel.


Bret Cahill