Experimental and numerical analysis of radiative entropy generation in industrial and boiler furnaces

Thermodynamics Irreversibilities Analysis of Oxy-Fuel Diffusion Flames: The Effect of Oxygen Concentration

“…Zhang et al analyzed the effects of different diluents (argon, N 2 , CO 2 , and N 2 /CO 2 ) on exergy losses from hydrogen premixed flames [ 7 ]. Besides that, considering the significant role of thermal radiation in high temperature systems, many researchers also analyzed entropy generation due to thermal radiation in flames [ 8 , 9 , 10 , 11 , 12 ]. The research results from Liu et al [ 8 ] on confined jet flames and Makhanlall et al [ 9 ] on diffusion combusting flows demonstrated that radiation entropy generation is also a non-negligible component in thermodynamics second-law analysis in combustion processes.…”

“…The research results from Liu et al [ 8 ] on confined jet flames and Makhanlall et al [ 9 ] on diffusion combusting flows demonstrated that radiation entropy generation is also a non-negligible component in thermodynamics second-law analysis in combustion processes. Zhang and Lou et al [ 10 , 11 ] presented a numerical analysis and experimental investigation of radiation entropy generation in high-temperature systems and large-scale boiler furnaces. Rajabi et al [ 12 ] computationally investigated local and global entropy generation features in gas turbine combustors.…”

Numerical Investigation of Exergy Loss of Ammonia Addition in Hydrocarbon Diffusion Flames

“…Datta [ 17 , 18 ] calculated the entropy generation in a laminar jet diffusion flame, and he analyzed the effect of gravity on the rate of entropy generation. Meanwhile, Lou et al [ 19 , 20 , 21 , 22 , 23 ] calculated the radiative entropy generation in flames, and they also investigated the effects of soot and temperature on entropy generation in hydrocarbon flames. Recently, the thermodynamics second-law analysis of the combustion process of hydrogen has received extensive attention.…”

Entropy generation minimization in a channel flow: Application to different advection-diffusion processes and boundary conditions

“…In convective flow heat and mass transfer, the total entropy generation rate is generally a sum of several terms. In the absence of radiative heat transfer [26], chemical reaction [27,28], cross effects 35 such as Dufour or Soret ones [29] and dissipation related to electric or magnetic fields [30,31], the entropy generation rate originates from viscous friction, on the one hand, and from the diffusion of heat or mass through finite temperature or mass concentration differences, on 40 the other hand. Acting on one of the two terms, for example by reducing the rate of heat conduction entropy generation, can lead to an increase in viscous friction entropy generation and it is necessary to seek the right compromise between two opposing effects.…”

“…This is the case for the entropy generation rates (due to viscous friction in particular) and the total viscous dissipation (Figs. 5,8,9,12,13,14,16,18,22,700 24, 25,26,28). Simultaneously, a change in the pattern of the velocity field occurs at W Φ = W Φ,critical as can be seen in Figs.…”