Which outcome occurs when a refrigeration system's condenser becomes significantly fouled with scale buildup?

💡 Explanation

When condenser tubes foul, the heat transfer rate drops because scale acts as an insulator, inhibiting heat rejection and causing the condensing temperature (and pressure) to rise. Therefore, compressor discharge temperature increases, rather than decreased superheat, reduced subcooling, or increased valve capacity, which relate to evaporator or expansion valve performance.

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