Entropy generation minimization of free convection film condensation on an elliptical cylinder

Thermodynamic optimization of free convection film condensation on a horizontal elliptical tube with variable wall temperature

“…Notably, the amplitude of non-isothermal wall temperature variation plays a significant role in the growth of minimum entropy generation rate, for instance, A = 1. Meanwhile, for isothermal wall case, A = 0, the analysis also agreed with Li and Yang [23] in the fact that the optimal entropy generation number is proportional to the four root of group parameter, Ra/Ja. Therefore, the amplitude of non-isothermal wall temperature variation is the major concern for the second law based on minimization of total entropy generation rate.…”

Entropy generation of vapor condensation in the presence of a non-condensable gas in a shell and tube condenser

“…Li and Yang [6] performed a thermodynamic analysis of a saturated vapor flowing slowly onto and condensing on an elliptical cylinder. The authors showed how a geometrical parameter, ellipticity, affects entropy generation during a film-wise condensation process.…”

Second law analysis of free convection film condensation on an inclined porous elliptical tube

“…Besides, based on our previous studies e Yang and Hsu [9] and Li and Yang [10], and noted from the mathematical point of view, a circular tube is one kind of elliptical tubes with zero ellipticity; a flat plate is another kind of elliptical tubes with ellipticity equal to unity. Two of our aims are to investigate the heat-transfer characteristics for an inclined porous elliptical tube case and to study the effect of surface curvature upon the heat-transfer rate and hydrodynamics characteristics for condensation in porous media.…”