Question 93Steam Plants - 1st Asst/Chief
70% to passIf 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
A0.2 inches Hg
B0.7 inches Hg
C4 degrees Fahrenheit
D7 degrees Fahrenheit
AI Explanation
The correct answer is C) 4 degrees Fahrenheit. The condensate depression is the difference between the condensate discharge temperature and the saturation temperature corresponding to the main condenser vacuum. With a vacuum of 28.5"Hg, the saturation temperature is approximately 86°F. Since the condensate discharge temperature is also 86°F, the condensate depression is 4 degrees Fahrenheit. The other options are incorrect because: A) 0.2 inches Hg is the incorrect unit for condensate depression, which is a temperature difference. B) 0.7 inches Hg is also the incorrect unit for condensate depression. D) 7 degrees Fahrenheit is an incorrect temperature difference based on the given information.
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