minimized forced boiler outages), but the wall also absorbed heat,which helped to generate more steam. As a result, boiler tube banksurface was reduced because of this additional steam-generating surfacein the furnace. In order to obtain a higher cycle efficiency, feedwaterand steam temperatures were increased, with an increase insteam pressure, and this further reduced boiler tube bank surface.However, it was replaced with an additional superheater surface
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