Question

In: Mechanical Engineering

In a galvanised steel water supply line 100 m long and 50 mm in diameter, water...

In a galvanised steel water supply line 100 m long and 50 mm in diameter, water is pumped from a reservoir to a vented storage tank at an elevation 8 m above it. The following fittings are use: 1 hinged foot valve with strainer, 3 x 90? elbows, 2 gate calves (open), 20 screwed sockets, 1 sudden exit. The water viscosity is 1 x 10-6 m2/s and the density is 1000 kg/m3.

(a) Calculate the friction factor at a flow rate of 3 L/s

(b) Using a constant friction factor as determined in (a), determine the system head equation in terms of velocity.

(c) Using a constant friction factor as determined in (a), determine the system head equation in terms of flow rate in L/s

(d) Using a constant friction factor as calculated in (a), determine the system head and fluid power for flow rates of 0, 1.5, 3, 4.5, and 6 L/s

(e) Draw the graph of system head and fluid power against flow rate on one sheet of graph sheet, using the values calculated in (d)

(f) If the efficiency of the pump is 65% when the flow rate is 5 L/s, determine the input power to the pump at this flow rate.

Solutions

Expert Solution

samet mamat answered 2 years ago
Next > < Previous

Related Solutions

A jet of water 50 mm in diameter with a velocity of 20 m/s strikes a...
A jet of water 50 mm in diameter with a velocity of 20 m/s strikes a flat plate inclined at an angle of 30° to the axis of the jet. Determine (i) the normal force exerted on the plate when the plate is stationary (ii) the normal force exerted on the plate when the plate is moving at 5 m/s in the direction of the jet (iii) the work-done on the plate and the efficiency for case (ii).
A pipe, 900 m long and 200 mm in diameter discharges water to the atmosphere at...
A pipe, 900 m long and 200 mm in diameter discharges water to the atmosphere at a point 10 m below the inlet level. With an inlet pressure of 40 kPa gauge, the flow rate is 40 litres/sec. At a point half way between the pipe inlet and outlet, a new tapping is made from which water is taken at a rate of 18 litres/sec. To what value must the inlet pressure be raised in order to maintain the same...
) A 50 mm-diameter propeller was installed in a 150 mm-diameter water pipe and the propeller...
) A 50 mm-diameter propeller was installed in a 150 mm-diameter water pipe and the propeller speed was measured for a range of water discharge in the pipe. The water had a density and dynamic viscosity of 1000 kg/m3 and 0.00112 Ns/m2 respectively. The measured results were as follows: Q (litres/s): 12 28 45 63 95 120 160 180 N (rps): 5 10 15 20 30 40 60 80 Plot the dependence of propeller coefficient against propeller Reynolds number. A...
A cylinder 100 mm in diameter and 80 mm long with an initial temperature of 527...
A cylinder 100 mm in diameter and 80 mm long with an initial temperature of 527 C is suddenly exposed to water at 27 C giving a convective heat transfer coefficient of 400 W/m2-K. Determine the temperature at the center of the cylinder after 10 minutes. Assume density is 8050 kg/m3, specific heat is 536 kJ/kg-K, and thermal conductivity is 18.6 W/m-K. **** Not lumped Capacitance Problem. ****
Sandstone pore of 20 mm in diameter and 100 mm long with porosity of 15% is...
Sandstone pore of 20 mm in diameter and 100 mm long with porosity of 15% is prepared for core flood experiment. The sandstone pore is fully (100%) saturated with water by injecting water with viscosity of 1cp at volumetric flow rate of 20 cubic mm/sec. A pressure drop of 1 atm was recorded across the pore during the injection process. i. What is the absolute permeability of the sandstone pore sample in mD? ii. What is the pore volume of...
Sandstone pore of 20 mm in diameter and 100 mm long with porosity of 15% is...
Sandstone pore of 20 mm in diameter and 100 mm long with porosity of 15% is prepared for core flood experiment. The sandstone pore is fully (100%) saturated with water by injecting water with viscosity of 1cp at volumetric flow rate of 20 cubic mm/sec. A pressure drop of 1 atm was recorded across the pore during the injection process. i. What is the absolute permeability of the sandstone pore sample in mD? ii. What is the pore volume of...
6. Water steadily enters an extremely thin 100 m stainless steel pipe with a diameter of...
6. Water steadily enters an extremely thin 100 m stainless steel pipe with a diameter of 10 cm at a mass flow rate of 31.4 kg/s at 80 °C at 100 kPa. The convection heat transfer coefficient between the ambient air (20 °C) and water pipe is ℎ = 120 ?/(?^2)?. You can ignore the heat loss by radiation and assume the temperature of the water and pipe surface are almost same but the temperature Difference is very small but...
The advertised diameter of steel rods manufactured by a certain company is 50 mm. During a...
The advertised diameter of steel rods manufactured by a certain company is 50 mm. During a routine check, five rods are selected randomly from a large lot and their diameters are measured yielding the following values: 50.16, 50.27, 50.13, 50.22, 50.32. The diameter can be assumed to be at least approximately normally distributed. At a 5% significance level, does the evidence suggest that the diameter of rods manufactured by the company is not 50 mm? Report also a p-value.
A steel drill rod that is 10 mm in diameter and 20 cm long is being...
A steel drill rod that is 10 mm in diameter and 20 cm long is being heat treated in an oil bath. The 1050°C rod is quenched and held at 700°C and then quenched a second time to 30°C. Calculate the quantities of heat that must be removed at the two quenching stages. Weight density of steel as ρw = 76 kN/m3 , The specific heat of steel is c= 0.50 kJ/(kg . ºC).
The steel pipe (100 mm outer diameter) is covered with two layers of insulation. The 40...
The steel pipe (100 mm outer diameter) is covered with two layers of insulation. The 40 mm thick inner layer has a thermal conductivity of 0.07 W / (mK). Outer layer, 20 mm thick has a thermal conductivity of 0.15 W / (m K). The pipe is used to drain 500 kPa pressurized steam. The temperature on the outer insulation surface is 24 ° C. If the pipe is 8 m long, determine the following: (assuming that the conduction heat...
ADVERTISEMENT
Subjects
ADVERTISEMENT
Latest Questions
ADVERTISEMENT