Water at 20C is to be pumped from a reservoir (ZA = 5 m) to another...

 

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Water at 20C is to be pumped from a reservoir (ZA = 5 m) to another reservoir at a higher elevation (ZB = 13 m) through two 36-m- long pipes connected in parallel as shown. The pipes are made of commercial steel, and the diameter of the two pipes are 4 cm and 8 cm. Water is to be pumped by a 70% efficient motor-pump combination that draws 8 kW of electric power during operation. The minor losses in pipes that connect the parallel pipes to the two reservoirs are considered to be negligible. Determine the total flow rate between the reservoirs and the flow rate through each of the parallel pipes. ZA=5m Control 4 = 36 m D = 4 cm volume -boundary B z=13 m Pump D = 8 cm 2=36 m Water at 20C is to be pumped from a reservoir (ZA = 5 m) to another reservoir at a higher elevation (ZB = 13 m) through two 36-m- long pipes connected in parallel as shown. The pipes are made of commercial steel, and the diameter of the two pipes are 4 cm and 8 cm. Water is to be pumped by a 70% efficient motor-pump combination that draws 8 kW of electric power during operation. The minor losses in pipes that connect the parallel pipes to the two reservoirs are considered to be negligible. Determine the total flow rate between the reservoirs and the flow rate through each of the parallel pipes. ZA=5m Control 4 = 36 m D = 4 cm volume -boundary B z=13 m Pump D = 8 cm 2=36 m