| 21. | The energy efficiencies of a heat engine are always smaller than its exergy efficiency.
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| 22. | It is thus in some sense a photonic heat engine.
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| 23. | Using heat engines, what's the highest temperature to which any object can be raised?
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| 24. | The Hadley system provides an example of a heat engine.
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| 25. | Rankine developed a complete theory of the steam engine and indeed of all heat engines.
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| 26. | For further comparisons of thermodynamic cycles, see heat engine.
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| 27. | Finally they had to get the steam heat engine up to push in the rear.
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| 28. | This S I process is a chemical heat engine.
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| 29. | Fuel cells do not have the same thermodynamic limits as they are not heat engines.
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| 30. | The piston-type Ericsson engine can potentially be the highest efficiency heat engine arrangement ever constructed.
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