Consistency of optimizing finite-time Carnot engines with the low-dissipation model in the two-level atomic heat engine

2021 ◽  
Author(s):  
Yu-Han Ma ◽  
Chang-Pu Sun ◽  
Hui Dong
Keyword(s):  
Finite Time ◽  
Heat Engine ◽  
Low Dissipation ◽  
Dissipation Model ◽  
Atomic Heat

scholarly journals Optimization and Stability of Heat Engines: The Role of Entropy Evolution

Entropy ◽  
2018 ◽  
Vol 20 (11) ◽  
pp. 865 ◽  
Author(s):  
Julian Gonzalez-Ayala ◽  
Moises Santillán ◽  
Maria Santos ◽  
Antonio Calvo Hernández ◽  
José Mateos Roco
Keyword(s):  
Local Stability ◽  
Production Efficiency ◽  
Basin Of Attraction ◽  
Heat Engine ◽  
Time Constraints ◽  
Thermal Gradients ◽  
Heat Engines ◽  
Low Dissipation ◽  
The Basin Of Attraction

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.

Finite-time optimization of a solar-driven heat engine

Solar Energy ◽  
1996 ◽  
Vol 56 (6) ◽  
pp. 617-620 ◽  
Author(s):  
Selahattın Gök Tun
Keyword(s):  
Finite Time ◽  
Heat Engine ◽  
Time Optimization

scholarly journals Universal constraint for efficiency and power of a low-dissipation heat engine

2018 ◽  
Vol 98 (4) ◽  
Author(s):  
Yu-Han Ma ◽  
Dazhi Xu ◽  
Hui Dong ◽  
Chang-Pu Sun
Keyword(s):  
Heat Engine ◽  
Low Dissipation ◽  
Universal Constraint

scholarly journals Optimal temperatures and maximum power output of a complex system with linear phenomenological heat transfer law

2009 ◽  
Vol 13 (4) ◽  
pp. 33-40 ◽  
Author(s):  
Lingen Chen ◽  
Jun Li ◽  
Fengrui Sun
Keyword(s):  
Complex System ◽  
Heat Transfer ◽  
Power Output ◽  
Finite Time ◽  
Heat Engine ◽  
Thermal Capacity ◽  
Maximum Power ◽  
Finite Time Thermodynamics ◽  
Maximum Power Output ◽  
Different Temperatures

A complex system including several heat reservoirs, finite thermal capacity subsystems with different temperatures and a transformer (heat engine or refrigerator) with linear phenomenological heat transfer law [q ? ?(T -1)] is studied by using finite time thermodynamics. The optimal temperatures of the subsystems and the transformer and the maximum power output (or the minimum power needed) of the system are obtained.

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