Thread: Solar power
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Old 04-03-2019, 01:27 PM   #25 (permalink)
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Originally Posted by jjackstone View Post
Transportation: Well, train engines have been hybrids since the beginning of diesel engines. The diesel powers generators for the electricity and the electric motors move the engine. Can they install enough batteries to take the place of the diesel engine? Don't know. But I bet if they can figure out a way to do it, say maybe add a battery pack car, that they will because a ninety percent battery pack efficiency is better than a thirty percent efficient diesel engine.
Please do the math regarding how much battery capacity it would take to move a train any reasonable distance. Or heavy truck. or a large farm tractor. or an earth mover that carries a load uphill. There is no replacing the nearly magical energy density of liquid fuel that we are now blessed with for doing heavy work.

570 Liters of diesel per day = 5,700 kWh per day. Even if you cut that by2.5 for the extra efficiency of electric motors with round trip losses you get 2,300 kWh per day for a large size farm machine. 12 Tesla grid scale 200kWh powerpacks per day to hot swap in and out. for just one tractor. We are going to need to start making a lot of wire to get all of this power around
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