21. Interestingly, as temperature decreases, the maximum theoretical fuel cell efficiency increases, in contrast to the Carnot cycle . 22. Entropy is the above-mentioned unexpected and, to some, obscure integral that arises directly from the Carnot cycle . 23. Hence, no real heat engine could realise the Carnot cycle 's reversibility and was condemned to be less efficient. 24. A reversible thermodynamic cycle for AMTEC shows that it is, at best, slightly less efficient than a Carnot cycle . 25. A Carnot cycle taking place between a hot reservoir at temperature T H and a cold reservoir at temperature T C. 26. Practical fossil fuel stations operating as heat engines cannot exceed the Carnot cycle limit for conversion of heat energy into useful work. 27. Any real heat engine could not realize the Carnot cycle 's reversibility, and was condemned to be even less efficient. 28. A Carnot cycle is a special kind of cyclic process affecting a body composed of material suitable for use in a heat engine. 29. Theoretical thermal efficiency equals that of the hypothetical Carnot cycle i . e . the highest efficiency attainable by any heat engine. 30. The remaining residual heat is still high enough to use it in traditional thermalized way via Carnot Cycle e . g . steam turbine.
