Results 51 to 60 of about 2,896,907 (259)
Linear irreversible heat engines based on the local equilibrium assumptions [PDF]
, 2015 We formulate an endoreversible finite-time Carnot cycle model based on the assumptions of local equilibrium and constant energy flux, where the efficiency and the power are expressed in terms of the thermodynamic variables of the working substance.
Izumida, Yuki, Okuda, Koji
core +2 more sources
Quantum heat engines with Carnot efficiency at maximum power
Physical Review Research, 2022 Heat engines constitute the major building blocks of modern technologies. However, conventional heat engines with higher power yield lesser efficiency and vice versa and respect various power-efficiency trade-off relations.
Mohit Lal Bera +3 more
doaj +1 more source
Double Contour Thermodynamic Cycle with Unidirectional Heat Transfer between the Refrigeration and the Energy Cycle [PDF]
Problems of the Regional Energetics, 2019 Practical characteristics of the method for improving cycles of complex cooling thermotrans-formers associated with the regeneration of the refrigeration cycle heat productivity (RCHP) are considered. The use of heat from the working fluid compression in
Gorpinko Yu.I. +4 more
doaj +1 more source
Carnot Cycles in a Harmonically Confined Ultracold Gas across Bose–Einstein Condensation
Entropy, 2023 Carnot cycles of samples of harmonically confined ultracold 87Rb fluids, near and across Bose–Einstein condensation (BEC), are analyzed. This is achieved through the experimental determination of the corresponding equation of state in terms of the ...
Ignacio Reyes-Ayala +6 more
doaj +1 more source
Fourier Heat Conduction as a phenomenon described within the scope of the Second Law
, 2014 The historical development of the Carnot cycle necessitated the construction of isothermal and adiabatic pathways within the cycle that were also mechanically "reversible" which lead eventually to the Kelvin-Clausius development of the entropy function ...
Jesudason, Christopher G.
core +1 more source
Efficiency at maximum power of minimally nonlinear irreversible heat engines [PDF]
, 2012 We propose the minimally nonlinear irreversible heat engine as a new general theoretical model to study the efficiency at the maximum power $\eta^*$ of heat engines operating between the hot heat reservoir at the temperature $T_h$ and the cold one at ...
Benjamin R. +12 more
core +2 more sources
International Journal of Low-Carbon Technologies, 2022 The inherent nature of the renewable energies is to be intermittent. This leads to negative effects on the security and stability of the energy production system.
Dong Zhao, Shuyan Sun, Hosein Alavi
semanticscholar +1 more source
Quantum, cyclic and particle-exchange heat engines
, 2004 Differences between the thermodynamic behavior of the three-level amplifier (a quantum heat engine based on a thermally pumped laser) and the classical Carnot cycle are usually attributed to the essentially quantum or discrete nature of the former.
Allahverdyan +33 more
core +1 more source
Quantum-dot Carnot engine at maximum power [PDF]
, 2010 We evaluate the efficiency at maximum power of a quantum-dot Carnot heat engine. The universal value of the coefficients at the linear and quadratic order in the temperature gradient are reproduced.
Broeck, Christian Van den +3 more
core +2 more sources
Onsager coefficients of a Brownian Carnot cycle [PDF]
The European Physical Journal B, 2010 We study a Brownian Carnot cycle introduced by T. Schmiedl and U. Seifert [Europhys. Lett. \textbf{81}, 20003 (2008)] from a viewpoint of the linear irreversible thermodynamics. By considering the entropy production rate of this cycle, we can determine thermodynamic forces and fluxes of the cycle and calculate the Onsager coefficients for general ...
Koji Okuda, Yuki Izumida
openaire +4 more sources