Which outcome occurs when a shell and tube heat exchanger experiences calcium carbonate scaling on tube surfaces?

💡 Explanation

When calcium carbonate scaling develops, it acts as thermal insulation because of the low thermal conductivity of the deposited layer, impeding heat flow and decreasing the heat exchanger’s overall effectiveness. Therefore reduced heat transfer is the result, rather than higher pressure drop, elevated outlet temperature, or accelerated corrosion which involve distinct processes.

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