Gonzalez-Ayala J, Santillán M, Santos MJ, Calvo Hernández A, Mateos Roco JM. Optimization and Stability of Heat Engines: The Role of Entropy Evolution.
ENTROPY 2018;
20:e20110865. [PMID:
33266589 PMCID:
PMC7512428 DOI:
10.3390/e20110865]
[Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/23/2018] [Revised: 11/05/2018] [Accepted: 11/07/2018] [Indexed: 11/16/2022]
Abstract
Local stability of maximum power and maximum compromise (Omega) operation regimes dynamic evolution for a low-dissipation heat engine is analyzed. The thermodynamic behavior of trajectories to the stationary state, after perturbing the operation regime, display a trade-off between stability, entropy production, efficiency and power output. This allows considering stability and optimization as connected pieces of a single phenomenon. Trajectories inside the basin of attraction display the smallest entropy drops. Additionally, it was found that time constraints, related with irreversible and endoreversible behaviors, influence the thermodynamic evolution of relaxation trajectories. The behavior of the evolution in terms of the symmetries of the model and the applied thermal gradients was analyzed.
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