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.

• Which risk increases when protective relay logic is incorrectly configured in interconnected power systems?
• Which aerodynamic effect reduces lift when an aircraft stalls?
• Which outcome occurs when an internal combustion engine's fuel injectors deliver overly rich mixtures?
• Which outcome occurs when achieving specified casting tolerances necessitates extensive secondary machining?
• Which consequence results when rapid valve actuation causes fluid-column separation in long hydraulic lines?
• Which risk increases when sand casting aluminum-silicon alloy components near a weld?