I am also going to give sunflowers a shot here, but mostly as a nutritional oil crop. (it's difficult to grow oil in coastl california)dsula wrote:pstarr wrote: (but that was okay really because corn ethanol remains a loser). It's true that corn ethanol is a way to convert sunlight, electricity (from coal and natural gas via milling/fermentation/distillation) and lots of diesel (growing/harvesting corn) but as others pointed out, you might as well use the coal and NG directly.
I don't know about corn ethanol. However I have everything lined up to plant sunflower to be processed into bio diesel. Cost of production (all included, also depreciation of equipment, and processing into diesel), approx $2/gallon. How can that be ?
Regarding biodiesel eroei; here is a link to Pimentel's seminal paper on the subject. Go to page 73 of the report where you will find a chart. Notice how comprehensive the chart is; he depreciates everything! So did you include all farm inputs in your energy accounting? Lime is a big number for soybeans. (don't know about sunflower) Notice the cost of steam to process the oil into biodiesel. Lots of hidden energy costs.