| Full text | |
| Author(s): |
Fernandez Noa, C. E.
[1]
;
Stable, Angel L. L.
[1]
;
Oropesa, William G. C.
[1]
;
Rosas, Alexandre
[2]
;
Fiore, C. E.
[1]
Total Authors: 5
|
| Affiliation: | [1] Univ Scio Paulo, Inst Fis, BR-05508090 Sao Paulo, SP - Brazil
[2] Univ Fed Paraiba, Dept Fis, CCEN, Caixa Postal 5008, BR-58059900 Joao Pessoa, Paraiba - Brazil
Total Affiliations: 2
|
| Document type: | Journal article |
| Source: | PHYSICAL REVIEW RESEARCH; v. 3, n. 4 DEC 2 2021. |
| Web of Science Citations: | 0 |
| Abstract | |
The construction of efficient thermal engines operating at finite times constitutes a fundamental and timely topic in nonequilibrium thermodynamics. We introduce a strategy for optimizing the performance of Brownian engines, based on a collisional approach for unequal interaction times between the system and thermal reservoirs. General (and exact) expressions for thermodynamic properties and their optimized values are obtained, irrespective of the driving forces, asymmetry, temperatures of reservoirs, and protocol to be maximized. Distinct routes for the engine optimization, including maximizations of output power and efficiency with respect to the asymmetry, the force, and both of these, are investigated. For the isothermal work-to-work converter and/or a small difference in temperature between reservoirs, they are solely expressed in terms of Onsager coefficients. Although the symmetric engine can operate very inefficiently depending on the control parameters, the usage of distinct contact times between the system and each reservoir not only can enhance the machine performance (signed by an optimal tuning ensuring the largest gain) but also enlarges substantially the machine regime operation. The present approach can pave the way for the construction of efficient Brownian engines operating at finite times. (AU) | |
| FAPESP's process: | 21/03372-2 - Stochastic thermodynamics of phase transitions and periodically driven systems |
| Grantee: | Carlos Eduardo Fiore dos Santos |
| Support Opportunities: | Regular Research Grants |
| FAPESP's process: | 18/02405-1 - Temporal disorder and entropy production in nonequilibrium systems with symmetry Z2 |
| Grantee: | Carlos Eduardo Fiore dos Santos |
| Support Opportunities: | Regular Research Grants |