Calculating Velocity and Total Head Loss in Rising Main
Questions:
1. What is the actual velocity if ID is 150mm?
2. What is the total head loss in rising main due to friction? (Ignoring local losses)
Answers:
1. The actual velocity when the diameter is 150 mm can be calculated as follows:
2. The total head loss due to friction in the rising main can be calculated using the following formula:
1. To find the actual velocity when the diameter is 150 mm, we use the formula:
Velocity = (4 x Flow Rate) / (π x Diameter² x 3600)
Plugging in the known values:
Velocity = (4 × 9.84) / (π × (0.15)² × 3600)
Velocity = 0.895 m/s
Therefore, the actual velocity of the fluid is 0.895 m/s.
2. The total head loss due to friction in the rising main can be calculated using the formula:
Total head loss (hf) = f(L/D)(v²/2g)
Substitute the values in the formula:
Total head loss (hf) = 0.0196(240/0.15)(0.895²/2 x 9.81)
Total head loss (hf) = 26.41 m
Therefore, the total head loss due to friction is 26.41 m.