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A centrifugal pump is being designed to pump liquid refrigerant R-134a atroom temperature and atmospheric pressure. The impeller inlet and outletradii are r1= 100 and r2= 180 mm, respectively (Fig. 14-42). Theimpeller inlet and outlet widths are b1= 50 and b2= 30 mm (into the pageof Fig. 14-42). The pump is to deliver 0.25 m3/s of the liquid at a net headof 14.5 m when the impeller rotates at 1720 rpm. Design the blade shapefor the case in which these operating conditions are the design conditions ofthe pump (V1,t= 0, as sketched in the figure); specifically, calculate anglesb1and b2, and discuss the shape of the blade. Also predict the horsepowerrequired by the pump. width=
FIGURE 14-42Relative and absolute velocity vectorsand geometry for the centrifugal pumpimpeller design of Example 14-6.
Write the software for the transmitting Computer 1. The transmission will occur in the background using input capture interrupts. You may use a FIFO queue without writing the three routines: InitFifo, PutFifo,and GetFifo.You may ignore FIFO full e..
a steam power plant operates on a simple ideal rankine cycle between the pressure limits of 3mpa and 50kpa. the
How successful would they be?
two large water reservoirs are connected by 8000 ft of schedule 40 steel pipe. the level of one reservoir is 500 ft
A 10 kW electric heater is used to heat 2 kg of air contained in an insulated rigid tank from 400 kPa and 50 °C to 200 °C. The ambient air temperature and pressure is 20 °C and 100 kPa, respectively.
a 10 m3 oxygen tank is at 15 degree c and 800 kpa. the valve is opened and some oxygen is allowed to escape until the
What is a 90 percent confidence interval for the standard deviation of the thickness of a washer produced by this procedure?
Determine the stress in the two materials and the reduction in length when the member carries a load of 200 kN. For steel E = 200 GPa and for brass E = 96 GPa.
a rigid tank contains 20 lbm of air at 50 psia and 80o f. the air is now heated until its pressure doubles. determine
Report on High speed machining on duplex stainless steel. In that report I need literature review on High speed machining.
The compressor pressure ratio is 10, and the turbine inlet temperature is 1400K. For k=1.4, calculate: (a) the thermal efficiency of the cycle (b) the back work ratio (c) the net power developed, in kW
A 782 pound 4WD vehicle is designed to clime a 16 degree ramp. What is the minimum acceptable coefficient of friction between its tires and the ramp surface?
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