Rapid fluctuation in the superheater temperature of a steady steaming boiler indicates __________.
• Relationship between steam temperature and steam moisture content • Effects of leaking tubes in different parts of the system (superheater vs desuperheater) • What causes rapid fluctuations versus a steady rise or fall in temperature
• Think about what happens to superheater outlet temperature if slugs of wet steam are occasionally entering the superheater section. • Ask yourself which condition would cause a fairly constant change in temperature and which would cause temperature to swing up and down quickly. • Consider where in the system a leak or problem would intermittently change the quality (dryness) of the steam reaching the superheater.
• Identify which choice is most directly related to changes in steam dryness at the superheater inlet. • Decide which fault would more likely produce a steady temperature deviation instead of a rapid fluctuation. • Distinguish between problems inside the superheater tubes versus upstream of the superheater and how each would affect temperature behavior.
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