A certain centrifugal pump was tested and its performance curves can be approximated as follows: H = 340 - 1.2(Q2), in feet BP = (0.0521Q3) + (1.25Q2) + (11.042Q) + 134.5, in horsepower where Q is in ft3/s. a. If a single pump is used to deliver water to a system which requires a total of 8 ft3/s, what is the efficiency of the pump (in %)? Take the specific weight of water to be 62.4 lbf/ft3. b. If two of these pumps are connected in series to deliver water to a system whose head requirement is 615 ft, what will be the operating discharge rate in ft3/s of either pump? Assuming the head is equally divided between the two pumps, what is the efficiency of either pump (in %)? Take the specific weight of water to be 62.4 lbf/ft3
A certain centrifugal pump was tested and its performance curves can be approximated as follows:
H = 340 - 1.2(Q2), in feet
BP = (0.0521Q3) + (1.25Q2) + (11.042Q) + 134.5, in horsepower
where Q is in ft3/s.
a. If a single pump is used to deliver water to a system which requires a total of 8 ft3/s, what is the efficiency of the pump (in %)? Take the specific weight of water to be 62.4 lbf/ft3.
b. If two of these pumps are connected in series to deliver water to a system whose head requirement is 615 ft, what will be the operating discharge rate in ft3/s of either pump? Assuming the head is equally divided between the two pumps, what is the efficiency of either pump (in %)? Take the specific weight of water to be 62.4 lbf/ft3.
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