Assuming it can be made to work the yield from algae is claimed to be
30,000 gallons diesel/acre-year. This comes out to be 30 kW/acre (24/7/52).This is over 3X the gross income as growing berries so it is probably economical especially considering the quality of the land doesn't matter.
Taken along with the 40% efficiency of a diesel engine, the mechanical work from algae oil is only 12 kW/acre (24/7/52).
Dish Stirling averages over 120 kW/acre mechanical work (24/7/52).
Now, to be sure, no one will deny that liquid fuel is often a convenient way to store and transport energy, but even if the electrical energy storage device, i. e., battery, pumped water, etc., is only 10% efficient, dish Stirling _still_ beats bio diesel in mech. energy/land use.
Bret Cahill