If there is a second condenser in place, it is most likely used to separate the diesel from the gasoline. It will have the added benefit of increasing the total cooling capacity of the system.
The biggest condenser will be the one that condenses out the diesel. As I understand it, the diesel fraction will condense out at a higher temp than gasoline fraction. Since there is more diesel produced, it will require the most cooling.
The liquid output from the first condenser would be the diesel fraction, the remaining gas would go to the second condenser where it would be condensed into the gasoline. The gas remaining after that second condenser will go to the compressor system.
The compression step causes the butane to condense out leaving the propane, methane etc. in the compressed gas tanks.
My research shows that the various hydrocarbons components of diesel condense out between 320 and 180 deg C.
My guess is that the second condenser will cool to close to ambient temps.
Indeed, things are moving forward at a steady pace.
Overall this has taken longer than expected as is frequently the case when moving from R&D into production hardware.
Still, I like what is going on. The air permit application will be the next major step. I am looking forward to that like most everyone else.
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