Hokkaido University Collection of Scholarly and Academic Papers >
Graduate School of Science / Faculty of Science >
Peer-reviewed Journal Articles, etc >
Achieving Carnot efficiency in a finite-power Brownian Carnot cycle with arbitrary temperature difference
Title: | Achieving Carnot efficiency in a finite-power Brownian Carnot cycle with arbitrary temperature difference |
Authors: | Miura, Kosuke Browse this author | Izumida, Yuki Browse this author →KAKEN DB | Okuda, Koji Browse this author |
Issue Date: | 1-Mar-2022 |
Publisher: | American Physical Society (APS) |
Journal Title: | Physical Review E |
Volume: | 105 |
Issue: | 3 |
Start Page: | 034102 |
Publisher DOI: | 10.1103/PhysRevE.105.034102 |
Abstract: | Achieving the Carnot efficiency at finite power is a challenging problem in heat engines due to the trade-off relation between efficiency and power that holds for general heat engines. It is pointed out that the Carnot efficiency at finite power may be achievable in the vanishing limit of the relaxation times of a system without breaking the trade-off relation. However, any explicit model of heat engines that realizes this scenario for arbitrary temperature difference has not been proposed. Here, we investigate an underdamped Brownian Carnot cycle where the finite-time adiabatic processes connecting the isothermal processes are tactically adopted. We show that in the vanishing limit of the relaxation times in the above cycle, the compatibility of the Carnot efficiency and finite power is achievable for arbitrary temperature difference. This is theoretically explained based on the trade-off relation derived for our cycle, which is also confirmed by numerical simulations. |
Rights: | ©2022 American Physical Society |
Type: | article |
URI: | http://hdl.handle.net/2115/85088 |
Appears in Collections: | 理学院・理学研究院 (Graduate School of Science / Faculty of Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
|
Submitter: 奥田 浩司
|