Example 12.23. Two reservoirs with a difference in elevation of 15 m are connected by thethree pipes in series. The pipes are 300 m long of diameter 30 cm, 150 m long of 20 cm diameter, and200 m long of 25 cm diameter respectively. The friction factors (f) in the relationfLV²hfD x 2gfor the three pipes are, respectively, 0.018, 0-020 and 0.019, and which account for friction and alllosses. Further the contractions and expansions are sudden. Determine the flow rate in l/s. The lossco-efficient for sudden contraction from dia. 30 cm to 20 cm = 0.24.(PTU)AD₁, L₁, fiD2, L2, f2D3, L3, f3H = 15B

Find : The Flow rate, Given : The Diameter are , The Length are

Example 12.23. Two reservoirs with a difference in elevation of 15 m are connected by the hree pipes in series. The pipes are 300 m long of diameter 30 cm, 150 m long of 20 cm diameter, and 200 m long of 25 cm diameter respectively. The friction factors (f) in the relation fLV2 h₂= D x 2g for the three pipes are, respectively, 0-018, 0-020 and 0-019, and which account for friction and all osses. Further the contractions and expansions are sudden. Determine the flow rate in l/s. The loss co-efficient for sudden contraction from dia. 30 cm to 20 cm = 0-24. (PTU)

Example 12.23. Two reservoirs with a difference in elevation of 15 m are connected by the hree pipes in series. The pipes are 300 m long of diameter 30 cm, 150 m long of 20 cm diameter, and 200 m long of 25 cm diameter respectively. The friction factors (f) in the relation fLV2 h₂= D x 2g for the three pipes are, respectively, 0-018, 0-020 and 0-019, and which account for friction and all osses. Further the contractions and expansions are sudden. Determine the flow rate in l/s. The loss co-efficient for sudden contraction from dia. 30 cm to 20 cm = 0-24. (PTU)

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter6: Forced Convection Over Exterior Surfaces

Section: Chapter Questions

Problem 6.8P

See similar textbooks

Similar questions

Two pipes are connected in series having a length and friction factor, “f” equal to each other. If the diameter of the first pipe is twice the diameter of the second pipe, what is the ratio of their velocities (V2 / V1)?
As shown in Figure P8.44, water flows from a large tank of depth 2 m through a square-edged entrance with a loss coefficient K1 = 0.5 to a pump that delivers a mass flow rate ˙m = 2.83 kg/s through a circular pipe of diameter D = 0.03 m, a length of 30 m, and a friction factor of 0.01. The pipe exits to atmospheric pressure with an exit loss coefficient of K2 = 1.0. Given that the density of water is 1000 kg/m3 , and the kinetic energy coefficient α = 1, find the power required to drive the pump, W˙shaft.
14A fluid flows at a speed of 7.5 m/s in a pipe with a diameter of 35 cm. What is the power, in W, of the pump to overcome the irreversible pressure drop when the pressure drop along the pipe is calculated to be 6300 Pa?
A centrifugal pump is required to deliver 50 liters of water per second to a height or 30 m through a 100 m long pipe of 15 cm diameter. The inlet losses in the suction pipe are estimated to be 0.35 m. Assuming an overall efficiency of 70 percent and taking Darcy’s friction coefficient of 0.015 for the pipeline, determine the power, in kW, required to drive the pump.
kindly answer only number 5 1 is just a reference 1. A water from Agno River is pumped using a submerged pump at an efficiency of 78% that is discharged to a swimming pool in Itogon which has a free surface of 30 m above the Agno River water level. The pipe that was used has a diameter of 7 cm on the suction line and 5 cm on the discharge line from the pump. If the power requirement of the pump is 5 kW assuming that the elevation difference between the pump inlet and outlet and the effect of the kinetic energy correction factors are negligible, calculate for the followinga) Power requirement by the pump in kW b) Pressure difference across the pumpc) Pumping cost/day(24 hour) if the electricity cost is ₱2.00/kW-h 5. In reference to problem number 1, if another pump was used having a power requirement of 12 hP with an efficiency of 73% in pumping the water at 1.2 ft3/s through a constant diameter of a pipe. Determine the irreversible head loss of the piping system in ft of water if…
A boiler requires 100 000 m3/hr of standard air. The mechanical efficiency of fan to be installed is 70%. Determine the size of driving motor needed assuming fan can deliver a pressure head of 160mm of water and outlet velocity of 20m/s. A. 60kw B. 81.8kw C. 75.8kw D. 71.81kw
The maximum flow rate of standard shower heads is about 3.5 gpm (13.3 L/min) and can be reduced to 2.75 gpm (10.5 L/min) by switching to low-flow shower heads that are equipped with flow controllers. Consider a family of four, with each person taking a 5-min shower every morning. City water at 15°C is heated to 55°C in an electric water heater and tempered to 42°C by cold water at the T-elbow of the shower before being routed to the shower heads. Assuming a constant specific heat of 4.18 kJ/kg·°C for water, determine the amount of electricity that will be saved per year, in kWh, by replacing the standard shower heads with the low-flow ones.
The maximum flow rate of standard shower heads is about 3.5 gpm (13.3 L/min) and can be reduced to 2.75 gpm (10.5 L/min) by switching to low-flow shower heads that are equipped with flow controllers. Consider a family of four, with each person taking a 5-min shower every morning. City water at 15°C is heated to 55°C in an electric water heater and tempered to 42°C by cold water at the T-elbow of the shower before being routed to the shower heads. Assuming a constant specific heat of 4.18 kJ/kg·°C for water, determine the ratio of the flow rates of the hot and cold water as they enter the T-elbow.
A liquid is pumped at 6,251 N / s between two tanks. Tank A is pressurized to 0.259 MPa and the efficiency of the pump is 0.7 the pipe has a diameter of 200mm with a surface roughness of 0.046mm and a length of 185m. Determine the power of the pump in MW. Properties: v=11.41x10^-7 m^2/s, miu= 1.7115x10^-3 Pa s, g= 9.81m/s^2 y Patm=101 kPa. choose from the table the losses suitable for the system
An axial-flow pump is designed to deliver water at a rate of 0.90 m3/s running at 620 rpm. Determine the available head, power, diameter and NPSH required for the pump at the maximum efficiency which is 75% . At maximum efficiency, the discharge coefficient, power coefficient, head coefficient and NPSH coefficient are given to be 0.048, 0.0012, 0.018 and 0.023 respectively. Take density of water to be 1000 kg/m3
Water flows between two reservoirs A & B. The water level in A is 400 m AOD and in B is 385m AOD. The reservoirs are connected by a 400mm diameter pipe, 1200m in length, which has a Darcy friction factor of 0.025. The lowest point in the pipeline is a distance of 400m from A and has a level of 360m AOD. Determine the rate of flow through the pipeline and the pressure at the lowest point.
fan ventilates at 500rev/min, the airflow is measyured at 150cubic meters/second. the ventilation pressure is 0.40kPa while thepressure along fan is0.85kPa.the mine requires 100cubic meters/second of air flow on an off day.efficiency=0.75. 1.new slow down speed required on an off day 2. Annual savings in electricty if the costs is R0.63/kWh 3. Comment on any savings in the maximum demand. 4. methods for reduction of speed on off-day.