Why is the reheat cycle preferred only for high capacity plants, 50 MW and above? How do the heat transfer characteristics affect boiler design? Draw the contour lines of temperature at various depths...

Why is the reheat cycle preferred only for high capacity plants, 50 MW and above?

How do the heat transfer characteristics affect boiler design?

Draw the contour lines of temperature at various depths of the furnace for a down fired radiant boiler.