Saturated water is supplied to a feed-pump at 0.035 bar. The outlet pressure is 12 bar.
1-Calculate the input power to the feed-pump if the mass flow of the water is 2 kg/s and the isentropic efficiency of the pump is 0.9
2-Calculate specific enthalpy, specific entropy, specific volume and temperature of the water before and after the pumping process
| Inputs |
Units |
|
|
Inlet Pressure |
0,035 |
bar |
|
Saturated Water |
0 |
. |
|
Outlet Pressure |
12 |
bar |
|
Isentropic Efficiency |
0,9 |
. |
|
Mass Flow |
2 |
Kg/s |
|
Outputs |
||
|
Inlet Enthalpy |
111,85 |
kJ/kg |
|
Inlet Entropy |
0,3907 |
kJ/(kg.K) |
|
Inlet Temperature |
26,69 |
C |
|
Enthalpy of Isentropic Compression |
113,20 |
kJ/kg |
|
Outlet Enthalpy |
113,35 |
kJ/kg |
|
Input Power |
3,01 |
KW |
|
Outlet Temperature |
26,79 |
C |
|
Outlet Entropy |
0,3912 |
kJ/kg |
|
Outlet Specific Volume |
0,0010 |
m3/kg |
|
Inlet Specific Volume |
0,0010 |
m3/kg |