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Efficiency at maximum power of minimally nonlinear irreversible heat engines
| Title: | Efficiency at maximum power of minimally nonlinear irreversible heat engines |
| Authors: | Izumida, Y. Browse this author | | Okuda, K. Browse this author |
| Issue Date: | Jan-2012 |
| Publisher: | European Physical Society |
| Journal Title: | EPL (Europhysics Letters) |
| Volume: | 97 |
| Issue: | 1 |
| Start Page: | 10004 |
| Publisher DOI: | 10.1209/0295-5075/97/10004 |
| Abstract: | We propose the minimally nonlinear irreversible heat engine as a new general theoretical model to study the efficiency at the maximum power η* of heat engines operating between the hot heat reservoir at the temperature Th and the cold one at Tc (Tc ≤ Th). Our model is based on the extended Onsager relations with a new nonlinear term meaning the power dissipation. In this model, we show that η* is bounded from the upper side by a function of the Carnot efficiency ηC ≡ 1 - Tc/Th as η* ≤ ηC/(2 - ηC). We demonstrate the validity of our theory by showing that the low-dissipation Carnot engine can easily be described by our theory. |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/48547 |
| 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)
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Submitter: 奥田 浩司
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