2019/10/31 by Yuhan Ma, Yu-Han Ma, Ruo-Xun Zhai +4
Chemistry · Engineering · Mathematics · Physics and Astronomy · #Advanced Thermodynamics and Statistical Mechanics #Computer science #Entropy (arrow of time) #Geometry #Materials science #Mathematics #Physics #Scaling #Scaling law #Statistical physics #Thermal #Thermal Radiation and Cooling Technologies #Thermodynamics #cond-mat.stat-mech #physics.class-ph #quant-ph #thermodynamics and calorimetric analyses
paper · pdf · doi:10.1103/physrevlett.125.210601
published as Phys. Rev. Lett. 125, 210601 (2020) · 6 pages, 4 figures for the main text. Supplementary Materials file is added and typos in Fig. 2 are corrected. Comments are welcome [[email protected]]
arxiv created 2019/10/31 · openalex created_date 2019/11/08 · openalex publication_date 2020/11/19 · arxiv updated 2020/11/25 · openalex updated_date 2026/08/05
The finite-time dynamics, apart from its fundamental importance in nonequilibrium thermodynamics, is of great significance in designing heat engine cycles. We build an experimental apparatus to test the predicted long-time 1/τ scaling of the irreversible entropy generation in the finite-time (τ) thermodynamic process by compressing dry air in a temperature-controlled water bath. We present the first direct experimental validation of the scaling, utilized in many finite-time thermodynamic models at the long-time regime. The experimental data also demonstrate a clear deviation from the scaling at the short-time regime. We show the optimal control scheme to minimize the irreversible entropy generation in finite-time process. Such optimization shall bring new insight to the practical design of heat engine cycles.