Question

Glycerine (u = 1.5 Pa.s and p = 1260 kg/m³) flows at a velocity of 5 m/s in a 14 cm diameter pipe. Estimate the head loss (m) in a length of 12 m of pipe. Water at 20°C flows in a 4 cm diameter pipe with a flow rate of 0.002 m³/s. Using Moody diagram, determine the head loss (m) in a 200 m section if the pipe is Wrought iron. A pressure drop of 200 kPa is not to be exceeded over a 200 m length of horizontal 1.2 m diameter concrete pipe (e = 1.15 mm) transporting water at 20°C. What flow rate can be accommodated (m³/s)? Calculate the concrete pipe diameter (m) (e = 1.15 mm) that will transport 5 m³/s of 20°C water so that the head loss does not exceed 20 m in a 300 m horizontal pipe section. The flow rate is measured to be 6 L/s in the pipe shown in the figure. Neglecting friction, find the loss coefficient of the valve if H is 8 cm.

What is the maximum flow rate (m³/s) through the concrete pipe (e = 1.15 mm)shown in the figure if the elevation difference of the reservoir surfaces is 148 m.

Estimate the power (kW) required for the given pump.

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