In an automatically fired boiler, increasing...

Question 1 / 270705eccefa0bacbc34ba4d46e1c

Question 1 of 270705eccefa0bacbc34ba4d46e1c

In an automatically fired boiler, increasing the temperature of the feed water entering the steam drum will ultimately result in a/an __________.

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Question 1 of 27070

In an automatically fired boiler, increasing the temperature of the feed water entering the steam drum will ultimately result in a/an __________.

🔍 Key Concepts

• Feedwater temperature and how it affects boiler efficiency and firing rate in an automatically fired boiler • Relationship between steam drum conditions (pressure, saturation temperature) and the superheater outlet temperature/degree of superheat • Difference between steam quality (moisture content) and degree of superheat

💭 Think About

• If the feedwater enters the drum at a higher temperature, does the boiler need more or less fuel to reach the same steaming rate and drum pressure? • How would warmer feedwater affect the amount of heat the superheater has available to add above the saturation temperature? • Does hotter feedwater make the steam leaving the drum wetter or drier before it enters the superheater?

✅ Before You Answer

• Be clear on the difference between steam quality (percent by weight that is vapor) and superheat temperature (degrees above saturation). • Think about whether higher feedwater temperature tends to improve or reduce overall thermal efficiency in a boiler. • Ask: in an automatically fired system that maintains constant pressure and load, would a change that improves efficiency cause an increase or decrease in fuel consumption?

Question 1 of 27070

In an automatically fired boiler, increasing the temperature of the feed water entering the steam drum will ultimately result in a/an __________.

increase in the quality of superheated steam

increase in fuel consumption

decrease in the degree of superheat

decrease in the quality of steam entering the superheater

Question 1 / 270705eccefa0bacbc34ba4d46e1c

Question 1 of 270705eccefa0bacbc34ba4d46e1c

In an automatically fired boiler, increasing the temperature of the feed water entering the steam drum will ultimately result in a/an __________.

Back

Question 1 of 27070

In an automatically fired boiler, increasing the temperature of the feed water entering the steam drum will ultimately result in a/an __________.