Finite-time thermodynamics: Engine performance improved by optimized piston motion
Open Access
- 1 April 1981
- journal article
- Published by Proceedings of the National Academy of Sciences in Proceedings of the National Academy of Sciences
- Vol. 78 (4) , 1986-1988
- https://doi.org/10.1073/pnas.78.4.1986
Abstract
The methods of finite-time thermodynamics are used to find the optimal time path of an Otto cycle with friction and heat leakage. Optimality is defined by maximization of the work per cycle; the system is constrained to operate at a fixed frequency, so the maximum power is obtained. The result is an improvement of about 10% in the effectiveness (second-law efficiency) of a conventional near-sinusoidal engine.Keywords
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