Numerical simulation of the heat transfer characteristics of the second and third superheaters in a coal-fired thermal power plant radiant boiler

Superheaters are essential components in a coal-fired power plant because they keep the highest tube wall temperature points radiant boiler. The pressurized steam flowing superheater tubes is heated via thermal radiation and convection from combustion gas. To prevent bursting of caused by fatigue for stable safe operation, precisely predicting complex heat transfer characteristics, estimating local flux necessary. In this study, computational fluid dynamics model boiler second third superheaters developed using (DO model) turbulence models (k-ε RNG model). installed near burner, influence gas strong, outermost highest. superheater, becomes large upper middle parts where flow velocity around high, whereas those at bottom significantly small due to dead water region Therefore, consider important prediction characteristics superheater.