Entropy generation vs energy efficiency for natural convection based energy flow in enclosures and various applications: A review

Biswal, Pratibha; Basak, Tanmay

doi:10.1016/j.rser.2017.04.070

Cited by 93 publications

(27 citation statements)

References 182 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Awad [10] presented a critical review of the thermodynamic optimum of micro channels based on entropy generation analysis. More recently, Biswal and Basak [11] performed a detailed review of the literature on the entropy generation analysis for heat transfer processes involving various practical applications. In addition, it should also be pointed out that Torabi et al [12] reported a concise review of a large number of studies where efforts were made to integrate entropy generation in thermal systems with solid structures including also convective-conductive problems in which the conductive process has dominating roles.…”

Section: Introductionmentioning

confidence: 99%

Prandtl Number Effects on the Entropy Generation During the Transient Mixed Convection in a Square Cavity Heated from Below

Ferroudj¹,

Köten

Kachi

et al. 2021

Period. Polytech. Mech. Eng.

View full text Add to dashboard Cite

This numerical study considers the mixed convection, heat transfer and the entropy generation within a square cavity partially heated from below with moving cooled vertical sidewalls. All the other horizontal sides of the cavity are assumed adiabatic. The governing equations, in stream function–vorticity form, are discretized and solved using the finite difference method. Numerical simulations are carried out, by varying the Richardson number, to show the impact of the Prandtl number on the thermal, flow fields, and more particularly on the entropy generation. Three working fluid, generally used in practice, namely mercury (Pr = 0.0251), air (Pr = 0.7296) and water (Pr = 6.263) are investigated and compared. Predicted streamlines, isotherms, entropy generation, as well as average Nusselt numbers are presented. The obtained results reveal that the impact of the Prandtl number is relatively significant both on the heat transfer performance and on the entropy generation. The average Nusselt number increase with increasing Prandtl number. Its value varies thereabouts from 3.7 to 3.8 for mercury, from 5.5 to 13 for air and, from 12.5 to 15 for water. In addition, it is found that the total average entropy generation is significantly higher in the case of mercury (Pr«1) and water (Pr»1) than in the case of air (Pr~1). Its value varies approximately from 700 to 1100 W/m3 K for mercury, from 200 to 500 W/m3 K for water and, from 0.03 to 5 W/m3 K for air.

show abstract

Section: Introductionmentioning

confidence: 99%

Prandtl Number Effects on the Entropy Generation During the Transient Mixed Convection in a Square Cavity Heated from Below

Ferroudj¹,

Köten

Kachi

et al. 2021

Period. Polytech. Mech. Eng.

View full text Add to dashboard Cite

show abstract

“…That study also indicated that the effects of radiation on thermal transmission and liquid circulation required investigation. A detailed review of the literature on the entropy generation analysis for heat transfer processes involving various practical applications was performed by Biswal and Basak [7].…”

Section: Introductionmentioning

confidence: 99%

The Influence of Surface Radiation on the Passive Cooling of a Heat-Generating Element

2019

View full text Add to dashboard Cite

Low-power electronic devices are suitably cooled by thermogravitational convection and radiation. The use of modern methods of computational mechanics makes it possible to develop efficient passive cooling systems. The present work deals with the numerical study of radiative-convective heat transfer in enclosure with a heat-generating source such as an electronic chip. The governing unsteady Reynolds-averaged Navier-Stokes (URANS) equations were solved using the finite difference method. Numerical results for the stream function-vorticity formulation are shown in the form of isotherm and streamline plots and average Nusselt numbers. The influence of the relevant parameters such as the Ostrogradsky number, surface emissivity, and the Rayleigh number on fluid flow characteristics and thermal transmission are investigated in detail. The comparative assessment clearly emphasizes the effect of surface radiation on the overall energy balance and leads to change the mean temperature inside the heat generating element. The results of the present study can be applied to the design of passive cooling systems.

show abstract

“…Mohesen Turabi et al [44] reviewed entropy generation in a thermal engineering system with solid structures. A comparison table between entropy generation and energy efficiency in natural convection has been analyzed by Pratibha and Tanway [45]. Some later works on entropy generation are [46][47][48][49][50].…”

Section: Introductionmentioning

confidence: 99%

Statistical Analysis of the Mathematical Model of Entropy Generation of Magnetized Nanofluid

Abbas¹,

Hussain²

2019

Inventions

View full text Add to dashboard Cite

This investigation introduces a mathematical model of entropy generation for Magnetohydrodynamic (MHD) peristaltic wave of nanofluid. The governing equations have been created by the supposition of low Reynolds number and long wavelength estimation. The scientific arrangement has been procured with the help of perturbation technique. The concentration profile, temperature profile, pressure distribution and friction forces are shown graphically for some important parameters. Further, the eventual outcomes of connection between the entropy generation and some various parameters have been plotted by means of correlation and regression. It is fundamental to find the affectability of each parameter on entropy generation.

show abstract

Entropy generation vs energy efficiency for natural convection based energy flow in enclosures and various applications: A review

Cited by 93 publications

References 182 publications

Prandtl Number Effects on the Entropy Generation During the Transient Mixed Convection in a Square Cavity Heated from Below

Prandtl Number Effects on the Entropy Generation During the Transient Mixed Convection in a Square Cavity Heated from Below

The Influence of Surface Radiation on the Passive Cooling of a Heat-Generating Element

Statistical Analysis of the Mathematical Model of Entropy Generation of Magnetized Nanofluid

Contact Info

Product

Resources

About