Carnot Cycle and Heat Engine Fundamentals and Applications II

Dear Colleagues,

Engineering and theoretical thermodynamics has been ripe for improvement, particularly since the sixties.

Regarding phenomenological thermodynamics, a first step was the consideration of endoreversible engines and reverse corresponding configurations. These phenomenological approaches are currently being improved through the consideration of dissipative mechanisms, in order to represent more precisely the global performance of the system, with more and more complex systems being considered—such as cascades and co- or trigeneration.

To optimize systems and processes, we first need to clearly define the objectives and constraints applied to them. The efficiency concept plays a central role in that. Three main aspects are related to particular fundamental or engineering situations:

- Fundamental physical criteria;

- Environmental concern;

- Economic concern.

Our first Special Issue on this topic examined the state-of-the-art of these aspects. What we propose here is to continue to explore the improvement of these approaches related to engines but also reverse cycle machines.

Additionally, it appears that these mesoscale studies are completed now with the use of nanoscale (quantum engines) as well as megastructures (implications in cosmology). Thus, it could be useful to correlate and compare all these options, which is another goal of this second Special Issue.

Prof. Dr. Michel Feidt
Guest Editor

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