ater at 15°C is to be discharged from a reservoir at a rate of 18 L/s using two horizontal cast iron pipes connected in series and a ump between them. The first pipe is 20 m long and has a 6-cm diameter, while the second pipe is 34 m long and has a 3-cm ameter. The water level in the reservoir is 30 m above the centerline of the pipe. The pipe entrance is sharp-edged, and losses ssociated with the connection of the pump are negligible. Neglecting the effect of the kinetic energy correction factor, determine the quired pumping head and the minimum pumping power to maintain the indicated flow rate. The density and dynamic viscosity of ater at 15°C are p = 999.1 kg/m³ and µ = 1.138 × 10−³ kg/m-s. The loss coefficient is K₁ = 0.5 for a sharp-edged entrance. The ughness of cast iron pipes is = 0.00026 m. Water tank 30 m 20 m Pump 6 cm 3 cm L he required pumping head is 1344.5 ✪ m. he minimum pumping power to maintain the indicated flow rate is 237 kW.
ater at 15°C is to be discharged from a reservoir at a rate of 18 L/s using two horizontal cast iron pipes connected in series and a ump between them. The first pipe is 20 m long and has a 6-cm diameter, while the second pipe is 34 m long and has a 3-cm ameter. The water level in the reservoir is 30 m above the centerline of the pipe. The pipe entrance is sharp-edged, and losses ssociated with the connection of the pump are negligible. Neglecting the effect of the kinetic energy correction factor, determine the quired pumping head and the minimum pumping power to maintain the indicated flow rate. The density and dynamic viscosity of ater at 15°C are p = 999.1 kg/m³ and µ = 1.138 × 10−³ kg/m-s. The loss coefficient is K₁ = 0.5 for a sharp-edged entrance. The ughness of cast iron pipes is = 0.00026 m. Water tank 30 m 20 m Pump 6 cm 3 cm L he required pumping head is 1344.5 ✪ m. he minimum pumping power to maintain the indicated flow rate is 237 kW.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:Water at 15°C is to be discharged from a reservoir at a rate of 18 L/s using two horizontal cast iron pipes connected in series and a
pump between them. The first pipe is 20 m long and has a 6-cm diameter, while the second pipe is 34 m long and has a 3-cm
diameter. The water level in the reservoir is 30 m above the centerline of the pipe. The pipe entrance is sharp-edged, and losses
associated with the connection of the pump are negligible. Neglecting the effect of the kinetic energy correction factor, determine the
required pumping head and the minimum pumping power to maintain the indicated flow rate. The density and dynamic viscosity of
water at 15°C are p = 999.1 kg/m³ and = 1.138 x 10-3 kg/m-s. The loss coefficient is KL = 0.5 for a sharp-edged entrance. The
roughness of cast iron pipes is ε = 0.00026 m.
F
Water
tank
30 m
20 m Pump
6 cm
3 cm
L
The required pumping head is 1344.5 m.
The minimum pumping power to maintain the indicated flow rate is 237
kW.
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