Quote:
Originally Posted by dcb
Are you also assuming that you have to have a series electric hybrid to use a turbine? Turbines have been powering wheels for a long time, i.e. the hydrokinetic transmission in an M1 tank.
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A small 56% eff turbine would never power anything at variable RPM without being a 30% eff turbine, not to mention it ramps up very slow.
That is the reason for a series/serial hybrid is to take advantage of the nearly double efficiency of single speed operation.
Also I didn't mention the motor because there are AC motors that can operate at above 95% at specific RPM and loads, using this as comparison is about as dumb as stating a prius is 38% eff when it really rarely is there except by people who do the extreme pulse and glide to 40ish MPH with prius.
So in other words I am admitting you aren't comparing apples to apples and the real world in both the prius and the situation I described varies from the absolute max in theory most of the time.
Unless of coarse the turbine is putting out exactly the amount required by the AC motor at its peak efficiency in which case battery losses go to zero.
Quote:
Originally Posted by dcb
How does any of this apply to a "modder" anyway? You going to put a turbine on your citicar?
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I would if I could buy one small enough, the only ones I know of that were cut/crimped/dropped into passenger vehicles is when they were rather big vehicles, like the hummers, antique hobbiest cars and some racers.
Also the topic of this discussion was serial hybrids, the situation I described is the only situation that is described in scholarly papers on the advantage of the serial hybrid.
Any other situation is not usefull to persue.
In my round about way I was stating there is promise to serial hybrids but not by using a 5hp Kohlman gas generator to drive your pickup truck 20mph.