Subcooled water is flowing through a throttled valve in an open system. The initial steady-state conditions for the throttled valve are as follows:
Inlet pressure = 60 psia
Outlet pressure = 44 psia
Flow rate = 800 gpm
After four hours, the current steady-state conditions for the throttled valve are as follows:
Inlet pressure = 62 psia
Outlet pressure = 40 psia
Flow rate = 600 gpm
Which one of the following could be responsible for the difference between the initial and current steady-state conditions for the throttled valve?
A. The throttled valve was opened more.
B. The throttled valve was closed more.
C. Another valve, located upstream of the throttled valve, was partially closed.
D. Another valve, located downstream of the throttled valve, was partially closed.
Show Answer
Answer: B
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