Lukewarm water at 60 °C in a storage tank is being pumped at 300 L/min from the tank. The line from the storage tank to the pump suction is 5 m of 2 inches Schedule 40 steel pipe, and it contains four (4) elbows. The discharge line after the pump is 50 m of 1.5 inches Schedule 40 steel pipe and contains a fully opened globe valve and two (2) elbows. The water was discharged to the households at 15 m above the water level in the storage tank. All elbows have a 90° angle. (Note: You must use the physical data from Perry's Handbook. For valve and fittings, you can use Geankoplis data) a) Calculate all frictional losses F. b) Make a mechanical-energy balance and calculate Ws of the pump in hp.

Lukewarm water at 60 °C in a storage tank is being pumped at 300 L/min from the tank. The line from the storage tank to the pump suction is 5 m of 2 inches Schedule 40 steel pipe, and it contains four (4) elbows. The discharge line after the pump is 50 m of 1.5 inches Schedule 40 steel pipe and contains a fully opened globe valve and two (2) elbows. The water was discharged to the households at 15 m above the water level in the storage tank. All elbows have a 90° angle. (Note: You must use the physical data from Perry's Handbook. For valve and fittings, you can use Geankoplis data) a) Calculate all frictional losses F. b) Make a mechanical-energy balance and calculate Ws of the pump in hp.

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

Water is pumped from a reservoir to a pressurized storage tank (P = 150 kPa gauge) atop a building by means of a centrifugal pump. There is a 70-m difference in elevation between the water surface in the reservoir and the end of the discharge line. The piping system consists of 80m of 5" SCH 40 steel pipe containing two 90o elbows, one gate valve, one rotary water meter, and six couplings from the reservoir to the pump; 3" SCH 40 steel pipe for 86m to the tank. The 3" pipe contains two gate valves, four 90o elbows, and ten couplings. It is desired to maintain a flow of water into the tank of 2.4 m3/min. Water temperature is 25oC. If the pump-motor set has efficiency of 65%, what would be the pumping costs be in pesos per day if electricity costs PhP 10.50/kW-hr?
A Francis turbine is installed with a vertical draft tube. The top of the draft is 1.0 m below thecenter line of spiral casing while the tail race water level is 3.0 m from the top of the draft tube. There is no velocity of whirl at the top or bottom of the draft tube and leakage are negligible. Theelevation of water from the reservoir to the center line of the turbine spiral casing is 50 m, and watervelocity at the inlet is 5 m/sec. Discharge is 2.5 cu.m/sec, hydraulic efficiency is 86%, overallefficiency of 83%. Determine the reading of a pressure gage (in psi) if one is installed at thepenstock just before the water inlet to the turbine.
Assume a horizontal shaft handling water at 65 deg C (Pv=2.503 KPa, Density=980.5 m3/kg). The suction nozzle is 1.64 m below the pump centerline and the pressure gauge reading at this point is 221Kpag. Determine the NPSHa if the head loss is 0.94 m.
include a free body diagram Seawater is to be pumped into a large tank at a rate of 165 kg/min. The tank is opwn to atmostsphere and the water enters the tank from a 80 m height. The overall efficiency of the motor pump unit is 75 percent and the motor consumes electricity at a rate of 3.2 KW. If the irreversible headloss in the piping is 7 m, the velocity of the water (in m/s) at the tank inlet isA. 6.21B. 7.12C. 8.7D. 5.05
Water at 20°C is to be pumped from one tank (ZA=5 m) to another tank at a higher elevation (ZB=13 m) through two 36 m long pipes connected in parallel, as shown in the figure. . The pipes are made of commercial steel, and the diameters of the two pipes are 4 and 8 cm. Water will be pumped via a 70 percent efficient motor-pump coupling that extracts 8 kW of electrical power during operation. Minor losses and head loss in the pipes connecting the pipe joints parallel to the two tanks are considered negligible. Determine the total flow rate between the reservoirs and the flow rate through each of the parallel pipes. Hypothesis: 1.The flow is stationary and incompressible. 2. The input elects are negligible and therefore the flow is fully developed. 3. The elevation of deposits remains constant. 4. Minor losses and head loss in pipes other than parallel pipes are said to be negligible. 5. The flows through both pipes are turbulent (to be verified).
6 cm-diameter commercial steel pipeline is used to transport water at 10⁰C from a reservoir to a free discharge point. The pipeline consists of 85 m straight pipe, 2 wide open gate valves, 1 wide open angle valve, 4 standart 90⁰ elbows, 1 entrance from a reservoir and 1 free discharge. The elevation of the entrance is 10 m while the elevation of the discharge is 35 m. The inlet pressure is 20 psig and exit pressure is 0 psig. A pump is installed in the line to move the water. Calculate the pump work (J/kg) so the volumetric flow rate will be Q= 0.01 m3/s. (1 psi = lbf/in2).
In the diesel oil transfer facility (ρ rel = 0.85), from the storage tank to the consumption tank, we want to install a pump to circulate a flow of 45 lt / s. The 400m long pipe is cast 150mm in diameter and consists of a check valve, a gate valve and 2 commercial medium radius elbows. The consumption tank is pressurized to 3.8 bar of manometric pressure. Determine the drive power of the pump in kW if its performance is 68%. Additional data, load loss factors: 1. Check valve Kr = 1.5 2. Gate valve open Kv = 0.21 3. Commercial elbow of mean radius Kc = 0.75, for each elbow 4. Storage tank outlet sharp angles Ks = 0.5 5. Entrance to consumption tank Ke = 1 6. Pipe friction factor f = 0.025
A 20 hp pump with a suction from an open reservoir (10 m abovethe pump) has a flow rate of 125 m3/hr and a suction pipe of 150mm diameter. Determine the discharge pressure of the pump if itpumps water to a tank 15 m above the pump. Discharge pipediameter of the pump is 100 mm.
The pump , running at 880 r/min, is topump water at 20°C through 75 m of horizontal galvanizediron pipe. All other system losses are neglected. Determinethe flow rate and input power for (a) pipe diameter =20 cm and (b) the pipe diameter found to yield maximumpump efficiency.
Water is pumped to a storage tank from a pool by a centrifugal pump. The elevation difference between the pool and the storage tank is 60 m. The stórage tank and the pool are open to atmosphere. 50 meters of 6 in Sc 40 steel pipe is used between pool andpump. After the pump 6 in Sc 40 pipe with a length of 22 m is suddenly contracted to 4 in Sc 40 pipe, that is 70 m. The flow rate of water is 2.5 m/min and the temperature is 20°C. If the pump efficiency is 0.6 and the cost of electrical energy is 0.40 TL/kWh,calculate daily cost of electricity used for this system
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 5 m long and has a 6-cm diameter, while the second pipe is 5 m long and has a 4-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 ρ = 999.1 kg/m3 and μ = 1.138x10-3 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.)
6 cm-diameter commercial steel pipeline is used to transport water at 10⁰C from a reservoir to a free discharge point. The pipeline consists of 85 m straight pipe, 2 wide-open gate valves, 1 wide open angle valve, 4 standard 90⁰ elbows, 1 entrance from a reservoir, and 1 free discharge. The elevation of the entrance is 10 m while the elevation of the discharge is 35 m. The inlet pressure is 20 psig and the exit pressure is 0 psig. A pump is installed in the line to move the water. Calculate the pump work (J/kg) so the volumetric flow rate will be Q= 0.01 m3/s.