Experimental characterisation of a centrifugal pump, at a fixed rotational speed (2500 rpm) and a 30...

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Experimental characterisation of a centrifugal pump, at a fixed rotational speed (2500 rpm) and a 30 cm impeller diameter, has yielded the following data: Pressure Rise ΔΡ,[bar] 0.9 0.5 Flow Rate Q,[lpm] 9.09 22.14 (a) Calculate the equation of the pump performance curve in the form of: H = H₁ - BQ² (b) The pump is required to deliver water to a reservoir 20 m above the source at a rate of 16 lpm. If the pipe network (Diameter, D= 10 cm) connecting the source to the reservoir include 3 Regular 90° Flanged Elbows, 2 Fully Opened Globe Valves and the Inlet from the source and Outlet to the Reservoir are Flush, calculate the system curve. Loses due to pipe friction (Darcy's friction) can be ignored. (c) Show that the pump is insufficient to meet the required delivery flow rate. Show how the pump could be scaled to ensure it meets this requirement. Experimental characterisation of a centrifugal pump, at a fixed rotational speed (2500 rpm) and a 30 cm impeller diameter, has yielded the following data: Pressure Rise ΔΡ,[bar] 0.9 0.5 Flow Rate Q,[lpm] 9.09 22.14 (a) Calculate the equation of the pump performance curve in the form of: H = H₁ - BQ² (b) The pump is required to deliver water to a reservoir 20 m above the source at a rate of 16 lpm. If the pipe network (Diameter, D= 10 cm) connecting the source to the reservoir include 3 Regular 90° Flanged Elbows, 2 Fully Opened Globe Valves and the Inlet from the source and Outlet to the Reservoir are Flush, calculate the system curve. Loses due to pipe friction (Darcy's friction) can be ignored. (c) Show that the pump is insufficient to meet the required delivery flow rate. Show how the pump could be scaled to ensure it meets this requirement.

Answer rating: 100% (QA)

SOLUTION a To determine the system curve we need to calculate the pressure drop across each component in the pipe network We will use the DarcyWeisbac... View the full answer