The annual average price for crude oil for 1995 when the NREL ASP Closeout Report was published was $16.75 US pb ( http://www.ioga.com/Special/crudeoil_Hist.htm ). Call it ~$17 US pb.
As of this writing, crude oil is trading at ~$100 US pb.
That's basically 6x.
=if we take the conclusion of the report literally=, algoil biodiesel from a system operating at ~1/3 of the theoretical limit of algae solar conversion efficiency should be price competitve with current petro diesel.
The same assumption says that when crude oil hits $134 US pb, algoil biodiesel from a system operating at ~1/4 the solar efficiency limit should be price competitive. When crude hits $168 US pb, ~1/5 the solar efficiency limit will do. Etc.
There is every indication that the ASP was conservative in their report, so the odds are these are =pessimistic= break even values.
If someone can "break" the cost asumptions made in the ASP study, the price parity point of algoil biodiesel vs petro diesel would improve accordingly.
What is needed is aggressive and clever process engineering to reduce operating costs. Folks like froggy could be invaluable in such an effort. Too bad some of them are too busy being biased naysayers. We could really use innovation by people with deep domain expertise.
...and froggy wonders why I get so frustrated with his bias and obstructionism.
Lately I've been thinking about ponds, streams, algae blooms, and naturally occuring algae clumps that are much higher in percent solids than average. If we could find a low energy cost way of artificially duplicating some of these natural effects, we could easily increase the algae mass percentage at initial harvest by a factor of 10x or more.
I'm trying to figure out how to build an artifical ecosystem that circulates algae based on temperature gradient, algae mass, and flowing H2O with as little energy input in the way of paddles etc as possible. I'm not in this for the money, so I'm perfectly will to share my thoughts and designs.
There is no basic science forbidding this. It's just a question of being clever enough.