To study the effect of such factors as unit load

outlet wall temperature of heating surface and measuring points location on the boiler inner wall temperature variation

the real-time data of boiler operation and inner wall temperature in high-temperature heating surface of an ultra supercritical unit were measured.Wall temperature variation curves of the high-temperature reheater and high-temperature superheater were obtained.The results showed that

the outlet temperature of heating surface can not correctly reflect the actual furnace wall temperature.The variation of wall temperature was consistent with that of the uint load.Temperature at front wall of the high-temperature superheater decreased with an increase in unit load

while that at the back wall agreed well with the unit load.