If the main condenser were operating at a vacuum of 28.5"Hg, a condensate discharge temperature of 86°F, a seawater inlet temperature of 72°F, and a seawater outlet temperature of 79°F, what would be the condensate depression? Illustration SG-0026

Correct Answer: Option B — 4 degrees Fahrenheit

Condensate depression is the difference between saturation temperature at the measured condenser vacuum and actual condensate temperature. At 28.5 inches Hg, saturation temperature is approximately 90°F. Subtracting the actual condensate discharge temperature of 86°F yields a condensate depression of 4°F.