Question 1 of 20
Q
Under normal conditions, the rate of heat transfer in a feedwater heater is most greatly affected by the __________.
A
pH of the feedwater
B
temperature differential between the steam and feedwater
C
density of the feedwater
D
speed of the main feed pump
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Question 1 / 205eccef9cbacbc34ba4d45791
Question 1 of 205eccef9cbacbc34ba4d45791

Under normal conditions, the rate of heat transfer in a feedwater heater is most greatly affected by the __________.

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Question 1 of 20
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Under normal conditions, the rate of heat transfer in a feedwater heater is most greatly affected by the __________.

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🔍 Key Concepts

• heat transfer in heat exchangers (conduction and convection) • temperature difference (ΔT) as the driving force for heat transfer • Basic heat transfer relation: Q = U · A · ΔT

💭 Think About

• Which of the listed factors actually provides the "driving force" that pushes heat from the steam side to the feedwater side? • Among the choices, which one appears directly (or most directly) in the standard heat transfer equation for a heater? • Ask yourself: if I change each variable slightly, which change would cause the largest and most immediate change in the rate of heat transfer under otherwise normal conditions?

✅ Before You Answer

• Focus on the factor that directly changes the driving temperature difference between hot and cold fluids. • Remember that pH and density usually affect corrosion, scaling, or flow characteristics more than the instantaneous rate of heat transfer in normal operation. • Consider whether pump speed primarily affects pressure/flow, or whether it is truly the main control on the rate of heat transfer in a properly designed feedwater heater.

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