Question 1 of 270705eccef9bbacbc34ba4d45632

What is the primary indication of fouling of a heat exchanger?

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Question 1 of 27070
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What is the primary indication of fouling of a heat exchanger?

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🔍 Key Concepts

• Heat transfer efficiency in a fouled vs. clean heat exchanger • Relationship between flow resistance (pressure drop) and deposits on tube or shell surfaces • How fouling affects the temperature approach (temperature difference between hot and cold fluids)

💭 Think About

• If deposits build up inside the passages, what happens to how easily the fluid can flow through (think in terms of pressure drop)? • When the heat-transfer surfaces are insulated by scale or slime, does heat transfer become easier or harder, and how would that show up in the temperature difference between the two fluids? • Consider which side’s symptoms (pressure and temperature changes) would be most obvious to an engineer monitoring gauges in the control room.

✅ Before You Answer

• Make sure you connect more restriction in a passage with the correct change in pressure drop across that side. • Decide whether reduced heat-transfer capability would make the outlet temperatures of the two fluids move closer together or farther apart. • Before choosing, double‑check that your option shows both the correct sign of pressure change and the correct direction of temperature‑difference change.