Article
Mechanics
Aradhana Kumari, Rahul Marathe, Sourabh Lahiri
Summary: Recent studies have shown that the concatenation of simple heat engines may result in non-monotonic variations in efficiency and power. In this study, we investigate the effect of concatenating two stochastic heat engines with trapped colloidal particles. We find non-trivial effects and enhanced power output when the trap strength varies linearly with time.
JOURNAL OF STATISTICAL MECHANICS-THEORY AND EXPERIMENT
(2023)
Review
Physics, Multidisciplinary
Viktor Holubec, Artem Ryabov
Summary: The study of fluctuations in the performance of small heat engines has gained attention due to the development of microscopic machines. Understanding these fluctuations may lead to a revolution similar to the discovery of the second law of thermodynamics.
JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL
(2022)
Article
Physics, Fluids & Plasmas
Rueih-Sheng Fu, Todd R. Gingrich
Summary: This study explores TUR-like bounds in overdamped and underdamped Langevin dynamics using large deviation theory, offering a new perspective and approach. It is found that current fluctuations achieved by scaling time can provide a deeper understanding of the relationship between current and dissipation in non-equilibrium systems.
Article
Physics, Fluids & Plasmas
Xiu-Hua Zhao, Zheng-Nan Gong, Z. C. Tu
Summary: We construct a microscopic model of low-dissipation engines by driving a Brownian particle in a time-dependent harmonic potential and introduce shortcuts to adiabaticity and isothermality. We derive an analytical formula of the efficiency at maximum power with explicit expressions of dissipation coefficients under the optimized protocols. The efficiency at maximum power tends to be 1/2 for large relative temperature differences, and we analyze the issue of power at any given efficiency for general low-dissipation engines.
Article
Physics, Fluids & Plasmas
Takaaki Monnai
Summary: This paper analytically demonstrates that the thermodynamic uncertainty relation (TUR) holds for the work performed on an externally perturbed quantum harmonic oscillator interacting with multiple reservoirs in full quantum regime. It evaluates how the noncommutativity affects the thermodynamic precision and explores its experimental accessibility.
Review
Physics, Multidisciplinary
Zhan-Chun Tu
Summary: The paper reviews three abstract models for heat engines: a classic model, a primary model, and a refined model for finite-time heat engines. It discusses how detailed models of heat engines in finite-time thermodynamics literature can be mapped into the refined abstract model, and surveys future developments based on this refined model.
FRONTIERS OF PHYSICS
(2021)
Review
Engineering, Chemical
Yanan Zhao, Mingliang Li, Rui Long, Zhichun Liu, Wei Liu
Summary: This study presents a comprehensive review of osmotic heat engines (OHEs), discussing their types, characteristics, and related heat-to-work thermodynamic systems. The potential applications and critical assessment of OHEs are also discussed, along with the technological challenges and research perspectives.
Article
Physics, Fluids & Plasmas
Olga Movilla Miangolarra, Rui Fu, Amirhossein Taghvaei, Yongxin Chen, Tryphon T. Georgiou
Summary: The study investigates thermodynamic processes in contact with a heat bath with arbitrary time-varying periodic temperature profile. It derives explicit bounds and optimal control protocols for thermodynamic engines in order to achieve maximum power and efficiency at any specified level of power.
Article
Physics, Multidisciplinary
Timur Koyuk, Udo Seifert
Summary: This paper investigates the properties of the thermodynamic uncertainty relation (TUR) in complex systems with many degrees of freedom. By analyzing the entropy production of mixtures of driven particles, an explicit expression for the optimal estimate of total entropy production is derived and applied to driven lattice gases.
PHYSICAL REVIEW LETTERS
(2022)
Article
Physics, Multidisciplinary
L-L Yan, J-W Zhang, M-R Yun, J-C Li, G-Y Ding, J-F Wei, J-T Bu, B. Wang, L. Chen, S-L Su, F. Zhou, Y. Jia, E-J Liang, M. Feng
Summary: Dissipation is crucial in cyclic processes in realistic systems, and recent research on nonequilibrium processes in stochastic systems has revealed a dissipation-time uncertainty relation that restricts the evolution pace of physical processes. The researchers experimentally verified this relation and obtained the first experimental evidence confirming the thermodynamic restriction on quantum operations due to dissipation.
PHYSICAL REVIEW LETTERS
(2022)
Article
Physics, Fluids & Plasmas
Massimiliano F. Sacchi
Summary: In this study, we investigate two-mode bosonic engines undergoing an Otto cycle. Energy exchange between the two bosonic systems is facilitated by a tunable unitary bilinear interaction, while cyclic operation is achieved by relaxation to different-temperature baths. Using a two-point measurement approach, we determined the joint probability of stochastic work and heat, and derived exact expressions for work and heat fluctuations, revealing interdependencies among average extracted work, fluctuations, and efficiency. Additionally, thermodynamic uncertainty relations were established between the signal-to-noise ratio of observed work and heat and entropy production.
Article
Physics, Multidisciplinary
Harry J. D. Miller, M. Hamed Mohammady, Marti Perarnau-Llobet, Giacomo Guarnieri
Summary: Thermodynamic uncertainty relations reveal the trade-off between precision and entropy production, setting an upper bound for the efficiency of autonomous heat engines. Heat engines operating in the periodic slow-driving regime can satisfy a less restrictive uncertainty relation, allowing for finite power production with small fluctuations while operating close to reversibility. The inclusion of quantum fluctuations reduces engine efficiency relative to average power and reliability.
PHYSICAL REVIEW LETTERS
(2021)
Article
Thermodynamics
Ahmed Saad Soliman, Shuping Zhu, Li Xu, Junguo Dong, Ping Cheng
Summary: A numerical investigation of a novel air preheating system for diesel engines was proposed to reduce pollutants during cold start. The comprehensive thermal model studied the effects of different nanoparticle types, weight fractions, engine speed, and ambient temperature on the preheating system. It was found that the system could significantly reduce charging time and heat intake air quickly from ambient temperatures.
CASE STUDIES IN THERMAL ENGINEERING
(2021)
Article
Thermodynamics
Rui Long, Yanan Zhao, Mingliang Li, Yao Pan, Zhichun Liu, Wei Liu
Summary: This study investigates a methanol-based adsorption-driven osmotic heat engine for recovering low temperature waste heat, providing criteria for selecting appropriate adsorbents and achieving a maximum energy efficiency through numerical analysis and experimentation.
Article
Quantum Science & Technology
Mohit Lal Bera, Maciej Lewenstein, Manabendra Nath Bera
Summary: Researchers have achieved a breakthrough in heat engines operating in the one-shot finite-size regime, where engines allow working systems to interact with two baths simultaneously and operate reversibly in a one-step cycle, thus achieving Carnot efficiency.
NPJ QUANTUM INFORMATION
(2021)
