Quote:
Originally Posted by drmiller100
you guys are making it too complicated. a ROUGH general rule - 1/3 energy of the gasoline goes to work, 1/3 goes to radiator, and 1/3 goes out the exhaust as heat.
The exhaust side of turbochargers work primarily becuase of HEAT, not pressure. The ENERGY in the exhaust is primarily found in the HEAT.
If you think about it, if it takes 15 horsepower to cruise down teh road, then there is 15 horsepower going out the tail pipe, and 15 horsepower in the radiator.
If we could figure out a way to make a Rankine cycle even 20 percent efficient we could almost double our mileage!
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The best way to increase engine efficiency, is to minimise it's operation as a function of time and maximise its efficiency in the time periods when it is running. That screams for capacitive storage of short bursts of operation when cruising at low overall loads.
Obviously this is why P&G can make a huge difference in overall consumption.
Once the strategy becomes a component of vehicle design, then you can add systems to minimise heat losses.
Make the vehicle capable of internal P&G operation and eliminate all the waste heat generation during the majority of time by simply eliminating the source of waste.
regards
Mech