A new pump is required for the water supply system of a high-rise office building. The system requires 0.06 m³/s of water pumped to a reservoir at the top of the tower 340 m above the street. City water pressure at the street-level pump inlet is 400 kPa gage. The piping is to be commercial steel, the overall length is 20 percent greater than the tower height, and there are fittings every 10 m with loss coefficients of 0.2. Determine the minimum diameter required to keep the average water velocity below 3.5 m/s in the pipe. Calculate the pressure rise required across the pump and estimate the minimum power needed to drive the pump.

A new pump is required for the water supply system of a high-rise office building. The system requires 0.06 m³/s of water pumped to a reservoir at the top of the tower 340 m above the street. City water pressure at the street-level pump inlet is 400 kPa gage. The piping is to be commercial steel, the overall length is 20 percent greater than the tower height, and there are fittings every 10 m with loss coefficients of 0.2. Determine the minimum diameter required to keep the average water velocity below 3.5 m/s in the pipe. Calculate the pressure rise required across the pump and estimate the minimum power needed to drive the pump.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Similar questions

A pump increases the pressure of water from 100 kPa to 900 kPa to an elevation of 35 m. The inlet and outlet diameters are identical. The net head of the pump is (a) 143 m (b) 117 m (c) 91 m (d) 70 m (e) 35 m
A pump receives water from a tank. If the pump needs 24 n of NPSHA, how high must the water level be above the pump centerline if the water saturated at 1724 kpa ? The friction loss in the pipe averages 0.3m for each 6m height and the flow is 23 lps in a 15024 cm id pipe.
1. Assume a horizontal shaft handling water at 65 deg C (Pv=2.503 KPa, Density=980.5 m3/kg). The suction nozzle is 4.35 m below the pump centerline and the pressure gauge reading at this point is 221Kpag. Determine the NPSHa if the head loss is 0.82 m. If the NPSHr is 3m less than the NPSHa you got on question number 1, determine the pump suction specific speed at pump rotating at 1800rpm and Q=500gpm
Assume a horizontal shaft handling water at 65 deg C (Pv=2.503 KPa, Density=980.5 m3/kg). The suction nozzle is 4.35 m below the pump centerline and the pressure gauge reading at this point is 221Kpag. Determine the NPSHa if the head loss is 0.82 m
A 70 percent efficient pump delivers water at 20°C fromone reservoir to another 20 ft higher, as in Fig. . Thepiping system consists of 60 ft of galvanized iron 2-in pipe,a reentrant entrance, two screwed 90° long-radius elbows,a screwed-open gate valve, and a sharp exit. What is theinput power required in horsepower with and without a 6°the well-designed conical expansion added to the exit? Theflow rate is 0.4 ft3/s.
A fully-filled open storage tower of height 32 m and diameter 3.0m supplies water to a house. A horizontal pipe at the base of the tower has a diameter of 2.54cm. To satisfy the needs of the home, the supply pipe must be able to deliver water at a rate of 0.67 gal/s. a. If water were flowing at the maximum rate, what would be the pressure in the horizontal pipe?b. A smaller pipe, of diameter 1.27 cm supplies the second floor of the house, a distance of 7.2 m above the ground level. What are the flow speed and water pressure in this pipe?
Water at 20°C is to be pumped through 2000 ft of pipe fromreservoir 1 to 2 at a rate of 3 ft3/s, as shown in Fig. P6.62.If the pipe is cast iron of diameter 6 in and the pump is75 percent efficient, what horsepower pump is needed?
When a pump with a suction and discharge pressure of 125 kPa and 409 kPa are used, the flow rate is 30L/s into a pipe with a diameter of 4 cm. Approximately 10cm in diameter, the suction diameter. What is the energy added to the water by the pump in meters
A pump was installed with a suction head of 6 meter and a discharge head of 10 meters. The discharge rate of the pump is 60 liters per minute. What is the water horsepower of the pump?
A pump draws 30-°C water at 0.5 liters per second from a pressurized tank where the air pressure above the water is . The required NPSH of the pump is 8.2 m. The suction pipe has a diameter of 4 cm, total length of 5.2 m, and friction factor of 0.005. If the pump has a suction lift of 3.8 m, will cavitation occur? Use the properties of sat. liquid water at 30°C. A. YES, CAVITATION WILL OCCUR B. NO, CAVITATION WILL NOT OCCUR
At a hydroelectric plant the difference in elevation between the surfaace of the water at the intake and at the tailrace is 183m (600ft). When the flow is 80 cfs, the friction loss in the penstock is 60 ft and the head utilized by the turbine is 460 ft. The mechanical friction in the turbine is 100hp, and the leakage loss is 3 cfs. Find (a) hydraulic efficiency; (b) volumetric efficiency; (c) power delivered to shaft; (d) brake horse power, (e) mechanical efficiency; (f) over-all efficiency.
Q9: Find the specific speed and power consumption for pump having the following properties: (Q=0.1 m3/s), (speed=725 r.p.m) and (head =15 m).