Furthermore, the ideal cycle efficiency is 1-T_low/T_high, where T_low would be the exhaust temperature and T_high the combustion temperature for this engine, in deg K.
T_high is limited by chemistry and materials to abt 1400 K, T_low depends on a whole pile of stuff, but in practice cannot be lower than 700 K or so for a simple (as opposed to compound) cycle that this engine uses. So the absolute maximum theoretical efficiency, using perfect insulators, frictionless bearings and ideal gases is about 50%.
Modern car turbo-diesel engines get abt 40% efficiency, stationary diesels reach 50% efficiency. Note these are compound cycles.
tldr: 3.5x efficiency improvement claim is bullshit.
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Furthermore, the ideal cycle efficiency is 1-T_low/T_high, where T_low would be the exhaust temperature and T_high the combustion temperature for this engine, in deg K.
T_high is limited by chemistry and materials to abt 1400 K, T_low depends on a whole pile of stuff, but in practice cannot be lower than 700 K or so for a simple (as opposed to compound) cycle that this engine uses. So the absolute maximum theoretical efficiency, using perfect insulators, frictionless bearings and ideal gases is about 50%.
Modern car turbo-diesel engines get abt 40% efficiency, stationary diesels reach 50% efficiency. Note these are compound cycles.
tldr: 3.5x efficiency improvement claim is bullshit.