Posted by buickanddeere on January 17, 2017 at 20:31:41 from (216.183.156.135):
In Reply to: Gas Diesel posted by JimS on January 16, 2017 at 18:14:53:
There is no way raise thermal efficiency into 50% range without high cost, complexity , secondary heat reclaimatiom and efficiency of large scale installations. The carnot cycle used in the Otto reciprocating engine's Rankine thermal process can only go so far.
To obtain fuel efficiency in that range, how is thermal efficiency going to be raised from the high 30% range into the 60% levels?
There are no appreciable reductions in rolling friction, aerodynamic drag , parasitic loads or weight reduction to reduce inertia.
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