Test and Correlative Formula of Boiler Superheater Inner-Flue and Outer-Flue Tube Wall Temperature

In order to monitor tube wall temperature of boiler superheater, a new method was put forward to observe inner-flue tube wall temperature by long-term measuring outer-flue tube wall temperature. The method was based on the relation between inner-flue tube wall temperature and outer-flue tube wall temperature that was build up through testing data. The testing points were settled on the inner-flue and the outer-flue of same tube. According to the experimental data, the inner-outer flue tube wall temperature relation modeling was build up and checked.