Results 261 to 270 of about 268,561 (292)

Entropy generation rate analysis in pendulum cart system undergoing damped oscillation

International Journal of Exergy, 2020
A mechanical system consisting of a cart with slender rod is considered in this work for entropy generation rate investigation via a thermodynamic analysis. The dynamic model of the system is formulated using Lagrange's equation. Entropy generation rate is then introduced as the time derivative of the net-work potential of the system.
Amin A. Mohammed, Mehmet Sunar, Ahmet Z. Sahin   +2 more
openaire   +1 more source

Minimization of Temheat Destruction Rate and Entropy Generation Rate in a 1D Transient Conductive Slab

Arabian Journal for Science and Engineering, 2020
In this work, a comparison is made for the behavior of the total entropy generation and the total temheat destruction during a transient heat conduction process. A slab undergoing a 1D heat conduction is used as an example to illustrate the transient behavior of both entropy generation and temheat destruction rates.
Khaled H. M. Al-Hamed, Ahmet Z. Sahin
openaire   +1 more source

A general rate-distortion converse bound for entropy-constrained scalar quantization

2016 IEEE International Symposium on Information Theory (ISIT), 2016
We derive a lower bound on the smallest output entropy that can be achieved via scalar quantization of a source with given expected quadratic distortion. As the allowed distortion tends to zero, the bound converges to the output entropy achieved by a uniform quantizer, thereby recovering the result by Gish and Pierce that uniform quantizers are ...
Tobias Koch, Gonzalo Vazquez-Vilar
openaire   +1 more source

Turbine Blade Entropy Generation Rate: Part I — The Boundary Layer Defined

Volume 3: Heat Transfer; Electric Power; Industrial and Cogeneration, 2000
The profile loss of a gas turbine blade is normally associated with the entropy increase due to the boundary layer phenomena of viscous shear, Reynolds stress generation and heat transfer. To establish the relative contributions of laminar, transitional and turbulent adiabatic boundary layer flow, to the overall entropy generation (as described in part
M. R. D. Davies, F. K. O’Donnell, A. J. Niven   +2 more
openaire   +1 more source

Entropy Generation Rate for Performance of Heat Transfer in Heat Exchangers

2022
This chapter provides a specific study of the performance of thermal systems, principally heat exchangers, which are applied in several industrial applications such as chemical industry, energetic industry, industrial lasers, and so on. These thermodynamics systems were critical in transferring heat from a higher to a lower temperature fluid. They have
openaire   +1 more source

Constructal entropy generation rate minimization for cylindrical pin-fin heat sinks

International Journal of Thermal Sciences, 2017
Abstract Optimization of in-line cylindrical pin-fin heat sinks (PFHS) is carried out by using constructal theory and entropy generation minimization (EGM) theory for fixed total heat sink volume and fin-material volume. The optimal constructs of cylindrical pin-fin are obtained by taking the minimum entropy generation rate (MEGR) as objective, and ...
Lingen Chen, Aibo Yang, Zhihui Xie, Fengrui Sun   +3 more
openaire   +1 more source

Entropy generation rate optimisation for profiled endwall design for axial turbines

Proceedings of Global Power & Propulsion Society
This paper investigates the formulation of the optimal objective function for aerodynamic design of turbomachinery using genetic algorithms (GA) supported by Computational Fluid Dynamics (CFD). The aim is to outline entropy generation rate minimisation as the most suitable objective function for improving turbomachinery. To this end, the calculation of
Pedro A. Martinez-Castro, Richard J. Williams, Grant L. Ingram   +2 more
openaire   +1 more source

Derivation of the differential equation of entropy generation rate

2021
Olfati, Mohammad, Jamshidmofid, Mohammad
openaire   +1 more source

Biphasic high-entropy layered oxide as a stable and high-rate cathode for sodium-ion batteries

Chemical Engineering Journal, 2023
Fuqiang Huang
exaly  

Entropy generation rate for a mechatronics system

International Journal of Exergy, 2017
openaire   +1 more source