Take the 96.5-cm pump in the figure as a starting point. The pump must pump 75 m3/min of water with density=1000kg/m3. The pump runs at 710 rpm.

for this condition and given the chart under: show detailed calculation/find:

a) net height

b) break horsepower (bhp)

c) efficiency

d) NPSH_needed

 

Transcribed Image Text:

Net head, m 120 105 90 75 60 30 n = 710rpm 0 105-cm dia.. 96.5-cm dia. 89-cm dia. %097 Curves based on clear water with 45 specific gravity of 1.0 15 72% 30 80% 45 84% 86% 60 88% 75 m³/min NPSH 90 88% 1000 hp 86% 84% 1500 hp 1250 hp * 105 7.5 6.0 4.5 3.0 NPSH, m Net head, m 120 105 90 75 60 30 n = 710rpm 0 105-cm dia.. 96.5-cm dia. 89-cm dia. %097 Curves based on clear water with 45 specific gravity of 1.0 15 72% 30 80% 45 84% 86% 60 88% 75 m³/min NPSH 90 88% 1000 hp 86% 84% 1500 hp 1250 hp * 105 7.5 6.0 4.5 3.0 NPSH, m

Answer rating: 100% (QA)

Solution Step 1 mmin 0 15 30 45 60 90 75mmin 105 30 45 specific gr... View the full answer