Results 161 to 170 of about 214 (209)

Trace Li Pre‐Doping of Activated Carbon Cathode Enabling Accelerated Li‐Ion Transport for High‐Power Lithium‐Ion Capacitors

Advanced Science, EarlyView.
Trace‐level Li pre‐doping on activated carbon cathodes is demonstrated to significantly enhance Li‐ion transport and high‐rate performance in lithium‐ion capacitors. An ultrathin Li2CO3 interfacial layer, formed through controlled thermal conversion, facilitates rapid ion transport without pore blockage.
Kyungmin Do, Jihyeon Ryu, Dong Gyun Im, Seong‐Yong Kim, Tae‐Hyun Kwon, Byeong Guk Kim, Seojin Jeon, Woosun Jang, Myoung Joon Hwang, Ki‐Hun Nam, Seung Yol Jeong, Ick‐Jun Kim, Seungwook Eom, Jaeik Hyun, Sunhye Yang   +14 more
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Applying second law of thermodynamic for optimization of horizontal steam generator

Progress in Nuclear Energy, 2021
Abstract One of the essential components in a pressurized water reactor is the steam generator (SG) that has an important role in efficiency of nuclear power plants. In the present work, a horizontal steam generator (HSG) was investigated based on entropy generation as a consequence of second law of thermodynamic.
M.E. Bahmanyar, N. Taheranpour, S. Talebi   +2 more
openaire   +1 more source

Performance optimization and thermodynamic analysis of irreversibility in a contemporary solar thermoelectric generator

Renewable Energy, 2021
Abstract In this paper, a model based on the first and second laws of thermodynamics is developed in MATLAB R2020a Simulink software and is utilized in thermodynamically optimizing a bismuth telluride based solar thermoelectric generator (STEG) while estimating all system irreversibilities.
Chika C. Maduabuchi, Kevwe A. Ejenakevwe, Chigbo A. Mgbemene   +2 more
openaire   +1 more source

Thermodynamic performance optimization for an irreversible vacuum thermionic generator

The European Physical Journal Plus, 2017
Theoretical model of an irreversible vacuum thermionic generator considering external and internal finite rate heat transfer is established in this paper. By assuming radiative heat transfer processes, the general expressions of performance parameters are derived based on non-equilibrium thermodynamics and finite-time thermodynamics (FTT).
Lingen Chen, Zemin Ding, Junle Zhou, Wenhua Wang, Fengrui Sun   +4 more
openaire   +1 more source

Finite Time Thermodynamic Optimization or Entropy Generation Minimization of Energy Systems

Journal of Non-Equilibrium Thermodynamics, 1999
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Chen, Lingen, Wu, Chih, Sun, Fengrui
openaire   +1 more source

Thermodynamic optimization method of regenerator of gas turbine with entropy generation

Journal of Heat Recovery Systems, 1986
Abstract In the design of the heat exchangers, the enhancement of heat transfer suraace area is effective to reduce the loss due to the fluid-to-fluid temperature difference. It, however, leads to the increase of the pressure loss in the channel. The optimum working condition must be determined by taking these trade of conditions into account.
Y. Tsujikawa, T. Sawada, T. Morimoto, K. Murata   +3 more
openaire   +1 more source

A numerical investigation of the entropy generation in and thermodynamic optimization of a combustion chamber

Energy, 2015
Abstract In this study, we are simulating the turbulent combustion of a mixed bluff-body swirl stabilized flame in a gas turbine combustion chamber and investigating the effects of different parameters, including the swirl number, distance between the air and fuel nozzle which is called bluff size, equivalence ratio, inlet fuel flow rate, and the ...
H.R. Arjmandi, E. Amani
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Applicability of the minimum entropy generation method for optimizing thermodynamic cycles

Chinese Physics B, 2013
Entropy generation is often used as a figure of merit in thermodynamic cycle optimizations. In this paper, it is shown that the applicability of the minimum entropy generation method to optimizing output power is conditional. The minimum entropy generation rate and the minimum entropy generation number do not correspond to the maximum output power when
Xue-Tao Cheng, Xin-Gang Liang
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Thermodynamic optimizing of pressure-retarded osmosis power generation systems

Journal of Membrane Science, 1999
A transport equation for a solution flow increasing due to osmosis inside a hollow cylindrical fibre is derived. The equation can be applied for either direct, pressure-retarded or reverse osmosis, when the membrane is highly selective. This transport equation is used to study theoretically the net power delivered, and the entropy generated by two ...
Ari Seppälä, Markku J. Lampinen
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Thermodynamic design of a power optimized irreversible thermionic generator

IECEC-97 Proceedings of the Thirty-Second Intersociety Energy Conversion Engineering Conference (Cat. No.97CH6203), 1997
The operating temperatures of the electrodes in a thermionic (TI) energy generator can better be determined through thermodynamic optimization rather than through heuristic principles. Since the power output of a TI generator has high functional dependence on operating temperatures, choice of these temperatures becomes a crucial aspect in the design of
openaire   +1 more source