A centrifugal fan rotates at a speed of 1460r/min and must deliver 1, 3m^3/s of air of density 1,22kg/m^3 at a total pressure of 370pa. Assume the manometric efficiency of the fan is 55% and that the whirl velocity at the exit of the impeller is double that of the peripheral velocity. Ignore mechanical losses and calculate a) the peripheral velocity of the impeller. b) the diameter of the impeller c) the power required to drive the fan

A single-stage centrifugal pump having a suction pipe 254 mm in diameter anda discharge pipe diameter of 5 inches is being tested and found out to discharge 48 lps ofwater. A pressure gage connected to the inlet pipe reads 118 mm Hg vacuum and adischarge gage reads 150 kPa at a distance 100 cm above the point where the inletpressure was measured. If the kW rating of the driving motor is 12 kW, calculate: a) the pump efficiency. b) if this pump runs at 1800 rpm, what will be the new discharge rate,head, and power developed if the pump speed was increased to 3600 rpm? Assumeconstant efficiency. c) Determine the pump type.

Problem 1(5): A centrifugal pump transports water between two reservoirs. The pump has an outer diameter of 15 cm, an inner diameter of 8 cm, and a blade width of 2 cm and operates at 1750 rpm. If the water enters the pump axially at ẞ₁ = 45º¸ compute the volume flow rate, Problem 2(10): In the pump of problem 1, the water exits at B₂ 65° when the pump is driven at 1750 rpm. = Compute the minimum power required by the pump?

An inflow to a turbine with a discharge of 20 m³/s leads to a ration speed of 150 rpm. The blades inlet edges have an angle of 120° to the direction of whirl. The outer diameter of the runner is 1.5 m and the runner inlet width is 1.0 m. 5. (a) To plot the velocity triangle at the blade outlet edge. (b) Assume design operating conditions and no velocity of whirl at outlet, calculate the power delivered by the runner. (c) The elevation difference between the head race and the tail race is 23 m and the head available to the turbine is 20 m, what is the hydraulic efficiency of the turbine and overall efficiency? (d) If a model of 1/10 full scale is constructed to operate under a head of 10 m, what must be its speed, power, water consumption and overall efficiency to run under the similar conditions to the prototype?

PROBLEM 6 An axial flow pump is required to deliver 1m3/s at 7m head while running at 960 rpm. Its outer diameter is 50 and hub diameter is 25 cm. Find the following (1) flow velocity, which is assumed to be constant from hub to tip, and A 4.59 m/s B 6.791 m/s C-60.7 m/s D.39.3 m/s (2) power required to drive the pump if overall efficiency is 84%, A 81.75 KW B. 12.03 KW C:40.7 KW D.60 9 KW

A centrifugal pump is used to lift water from a water reservoir with level 2 m below the pump center line. Then, to another reservoir with level 6 m above the center line. Pressure gages readings from the suction and discharge are 1 bar and 4 bars respectively. The flow rate at O.68 m3/s with pipe inside diameters of 400 mm at suction and 250 mm at the discharge. Assume over all head loss due to friction of 4 J/N, what is the discharge head in meter?

2. A wind turbine has the maximum power output at the rated speed of 12 m/s and a rotor diameter of 82 meters. The cut-in and cut-out speeds for this type of wind turbine are 4 m/s and 23 m/s, respectively. The table below shows the annual wind data near a potential site for setting up a wind farm using this type of wind turbine and the power coefficient of the wind turbine at the specific wind speed. The air density is 1.22 kg/m³. Wind speed (m/s) Power coefficient 7 Hours 1190 5 0.25 3000 10 0.5 2400 15 0.25 1700 20 0.1 400 25 50 30 20 (a). What is the maximum power output of this wind turbine, assuming Betz limit? (b). What is the average power output if the wind turbine is installed at this site?. (c). What is the capacity factor of the wind turbine at this site? (d). If a wind farm consisting of 100 such wind turbines is built at the site, how much energy does this wind farm generate in a year (in the unit of kWh)? (e). Is this a good site for using this particular type of wind…

1 The internal and external diameters of the impeller of a centrifugal pump are 200 mm and 400 mm respectively. The pump is running at 1200 rpm. Forward blades make an angle of 150o at exit and at inlet the angle is 20o. The blade thicknesses at the inlet and outlet are 100mm and 70mm respectively. The hydraulic efficiency of the pump is 87%. Assume the water enters the impeller radially. i Draw neatly the outlet velocity diagram and the inlet velocity diagram. ii Find the Euler power of the pump.  iii Find the net Head of the pump. Ans:  (ii)140.65W; (iii) 43.42m

Can you draw a diagram of what’s happening please thanks

A centrifugal pump is used to lift water from a water reservoir with level 2 m below the pump center line. Then, to another reservoir with level 5 m above the center line. Pressure gages readings fromn the suction and discharge are 1 bar and 4 bars respectively. The flow rate at 0.45 m/s with pipe inside diameters of 400 mm at suction and 250 mm at the discharge. Assume over all head loss due to friction of 4 J/N, if the pump has an efficiency of 80% and the motor has an efficiency of 90 %, what is the needed electrical power in kW?