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.
Highlights
The relevance of heat devices optimization and the searching for global properties of energy converters is increasing due to a growing need of energetic requirements; for a better use of available energy, and for maintenance cost, operation life-time, scale related controlheat waste, power output (P) and issues, etc
Along with maximum power and maximum efficiency or minimum entropy production, compromise based figures of merit have been found very valuable in the optimization analysis of heat devices [3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19]
It is easy to implement in any energy converter, isothermal or non-isothermal, because it does not require the explicit evaluation of the entropy generation, and it is independent on environmental parameters
Summary
The relevance of heat devices optimization and the searching for global properties of energy converters is increasing due to a growing need of energetic requirements; for a better use of available energy, and for maintenance cost, operation life-time, scale related controlheat waste, power output (P) and issues, etc. All these problems involve entropy production (∆S), efficiency η [1,2].
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