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 38 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 u= 1.138 × 10-3 kg/m-s. The loss coefficient is KL = 0.5 for a sharp-edged entrance. The roughness of cast iron pipes is ɛ = 0.00026 m. Water 30 m tank 20 m Pump L 3 cm 6 cm The required pumping head is O m. The minimum pumping power to maintain the indicated flow rate is ]kW.
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 38 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 u= 1.138 × 10-3 kg/m-s. The loss coefficient is KL = 0.5 for a sharp-edged entrance. The roughness of cast iron pipes is ɛ = 0.00026 m. Water 30 m tank 20 m Pump L 3 cm 6 cm The required pumping head is O m. The minimum pumping power to maintain the indicated flow rate is ]kW.
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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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 38 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 u= 1.138 × 10-3 kg/m-s. The loss coefficient is KL = 0.5 for a sharp-edged entrance. The
roughness of cast iron pipes is ɛ = 0.00026 m.
Water
30 m
tank
20 m Pump
3 cm
6 cm
The required pumping head is O m.
The minimum pumping power to maintain the indicated flow rate is [
kW.
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