
Concept explainers
A horizontal pipe carries oil with a specific gravity of

Energy loss between the two gages
Answer to Problem 7.1PP
Energy loss between the two gages is,
Explanation of Solution
Given information:
S.G. of oil=0.83
Pressure at point 1, P1= 74.6 psig
Pressure at point 1, P2= 62.2 psig
In this problem we apply the Bernoulli's Principle or law of conservation of energy for real fluids
Where,
P= Pressure,
V=Velocity,
Z= Datum head,
hL=Head loss or energy loss
Calculation:
Here we can edit the equation as per the conditions given in problem
As the pipe is horizontal, so the two points in the pipe are on the same level that is,
The cross sectional area of the pipe is uniform, so the velocity at both points is equal that is,
After putting these values, the above equation become
If we want to convert inch to ft then hLwill be multiplied 0.083
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