ArticleEntropy (Basel, Switzerland)2021
Optimization Modeling of Irreversible Carnot Engine from the Perspective of Combining Finite Speed and Finite Time Analysis.
Article in Entropy (Basel, Switzerland), 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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5 citing papers in PubMed.
- Linking Optimization Success and Stability of Finite-Time Thermodynamics Heat Engines.Entropy (Basel, Switzerland) · 2025Article
- Four-Objective Optimization for an Irreversible Porous Medium Cycle with Linear Variation in Working Fluid's Specific Heat.Entropy (Basel, Switzerland) · 2022Article
- The Carnot Cycle and Heat Engine Fundamentals and Applications II.Entropy (Basel, Switzerland) · 2022Article
- Optimal Heat Exchanger Area Distribution and Low-Temperature Heat Sink Temperature for Power Optimization of an Endoreversible Space Carnot Cycle.Entropy (Basel, Switzerland) · 2021Article
- Performance Analysis and Four-Objective Optimization of an Irreversible Rectangular Cycle.Entropy (Basel, Switzerland) · 2021Article
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Authors and funding
5 authors.
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Abstract
An irreversible Carnot cycle engine operating as a closed system is modeled using the Direct Method and the First Law of Thermodynamics for processes with Finite Speed. Several models considering the effect on the engine performance of external and internal irreversibilities expressed as a function of the piston speed are presented. External irreversibilities are due to heat transfer at temperature gradient between the cycle and heat reservoirs, while internal ones are represented by pressure losses due to the finite speed of the piston and friction. Moreover, a method for optimizing the temperature of the cycle fluid with respect to the temperature of source and sink and the piston speed is provided. The optimization results predict distinct maximums for the thermal efficiency and power output, as well as different behavior of the entropy generation per cycle and per time. The results obtained in this optimization, which is based on piston speed, and the Curzon-Ahlborn optimization, which is based on time duration, are compared and are found to differ significantly. Correction have been proposed in order to include internal irreversibility in the externally irreversible Carnot cycle from Curzon-Ahlborn optimization, which would be equivalent to a unification attempt of the two optimization analyses.
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