Efficiency at maximum power output for an engine with a passive piston

Tomohiko G. Sano, Hisao Hayakawa

研究成果: Article査読

2 被引用数 (Scopus)

抄録

Efficiency at maximum power (MP) output for an engine with a passive piston without mechanical controls between two reservoirs is studied theoretically.We enclose a hard core gas partitioned by a massive piston in a temperature-controlled container and analyze the efficiency at MP under a heating and cooling protocol without controlling the pressure acting on the piston from outside. We find the following three results: (i) The efficiency at MP for a dilute gas is close to the Chambadal-Novikov-Curzon-Ahlborn (CNCA) efficiency if we can ignore the sidewall friction and the loss of energy between a gas particle and the piston, while (ii) the efficiency for a moderately dense gas becomes smaller than the CNCA efficiency even when the temperature difference of the reservoirs is small. (iii) Introducing the Onsager matrix for an engine with a passive piston, we verify that the tight coupling condition for the matrix of the dilute gas is satisfied, while that of the moderately dense gas is not satisfied because of the inevitable heat leak.We confirm the validity of these results using the molecular dynamics simulation and introducing an effective mean-field-like model which we call the stochastic mean field model.

本文言語English
論文番号083A03
ジャーナルProgress of Theoretical and Experimental Physics
2016
8
DOI
出版ステータスPublished - 2016 8
外部発表はい

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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