Respuesta :
Answer:
Yes, the Pump will operate satisfactorily, because the NPSH is greater than required.
Explanation:
NPSH isa measure of how likely the fluid at the suction end of the pump is to experience cavitation. We always need NPSH to be above a given treshold required by the pump.
The definition of NPSH is:
[tex]NPSH= \frac{P_{atm}-P_{v}}{\rho \, g}-h-h_f[/tex]
Where:
- [tex]P_{atm}[/tex] and [tex]P_{v}[/tex] are atmospheric and vapour pressure correspondingly.
- [tex]h[/tex] is suction lift and [tex]h_f[/tex] is friction loss in meters.
- [tex]\rho[/tex] is the fluid's density
- [tex]g[/tex] is gravity, at sea level taken as [tex]9.81 \, m/s^2[/tex]
Extra Data: Water's vapour pressure at 65°C
[tex]P_v =25.022 \, kPa[/tex]
We can now calculate the NPSH
[tex]NPSH= \frac{101325-25022}{980.6\times9.81}\, m-3.5\, m- 0.9 \, m\\NPSH= 7.932\, m-3.5\, m- 0.9 \, m\\NPSH=3.532 \, m[/tex]
We can see that our NPSH is greater than the required NPSH:[tex]NPSH>NPSH_{req} = 2.1 \, m[/tex]
Thus our pump will operate without cavitation.