Problem 1: Fresh water at a temperature of 10°C flows at a rate of 0.10 m3/sec through the piping system sketched above. The system consists of 30 meters of 150 mm diameter (I.D.) galvanized iron pipe, 4 regular 90-degree threaded elbows, and a swing check valve which may be assumed to be in the forward flow position. The elbows and the inlet and outlet of the check valve are 150 mm I.D. also. The elevation of Station A is 2 meters higher than Station B, ?? −?? =2?. The skin friction factor of the pipe can be taken to have a value, ?=0.024. Calculate the following: a. The head loss due to pipe skin friction. b. The combined head loss from the 4 threaded elbows. c. The head loss through the swing check valve.
Problem 1: Fresh water at a temperature of 10°C flows at a rate of 0.10 m3/sec through the piping
system sketched above. The system consists of 30 meters of 150 mm diameter (I.D.) galvanized iron
pipe, 4 regular 90-degree threaded elbows, and a swing check valve which may be assumed to be in the forward flow position. The elbows and the inlet and outlet of the check valve are 150 mm I.D. also. The elevation of Station A is 2 meters higher than Station B, ?? −?? =2?. The skin friction factor of the
pipe can be taken to have a value, ?=0.024. Calculate the following:
a. The head loss due to pipe skin friction.
b. The combined head loss from the 4 threaded elbows.
c. The head loss through the swing check valve.
d. If the pressure at Station B is to be maintained at 150 kPa (gage), what is the required pressure
at Station A (pump exit)?
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