Great Plains Diesel Technologies
707 East Lincoln Way
Ames, Iowa 50010 USA
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W = Q

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September 19, 2014

The practical implementation of Carnot's idea was derived by Rudolf Diesel by analyzing the ideal gas law, pV = nRT.  Wrote Diesel: “The combustible is added in such a way, that no increase in temperature of the gases, consequent upon the process of combustion, takes place, … After ignition, combustion should not be left to itself, but be regulated by an external arrangement, maintaining the right proportion between the pressures, volumes, and temperatures.”  (Diesel, R., “Theory and Construction of a Rational Heat Motor,” Spon & Chamberlain, 1894)

Confirmation of Diesel’s theory is provided by modern researchers: Splitter, D., et al, “Reactivity Controlled Compression Ignition (RCCI) Heavy-Duty Engine Operation at Mid-and High-Loads with Conventional and Alternative Fuels,” SAE paper 2011-01-0363 . Current production diesel engines typically convert 41-42% of the heat into work.  The experimentalists report 59% in their paper.

If heat can be added without raising temperature, thermodynamics tells us that all, 100%, of that heat is turned into work at the time it is added.

The genius of Rudolf Diesel was to apply Carnot’s principles to define how and when to add high heat to get very close to this maximum efficiency.  The Great Plains Diesel Technologies, L.C. continuously-controllable injector technology can make this happen.


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