Summary page 1 of 2

CE415L REPORT REQUIREMENTS FOR LAB REPORT FOR EXP 7

A. SUMMARY OF RESULTS

Name: Group Number: Date of Report:

Part 1 – Centrifugal Pump Performance Curves

a. Shut-off TDH, Hshutoff (ft): (TDH = total dynamic head)

b. Maximum flowrate, Qmax (gpm) @ TDH hfull (ft): @

c. Maximum efficiency, η (%) @ flowrate, Q (gpm) : @

d. Maximum power input, Pi (w) @ flowrate, Q (gpm) : @

Part 2 – Centrifugal Pump Performance Due to Inlet Control

a. Shut-off TDH, Hshutoff (ft) :

b. Flowrate, Q (gpm) @ maximum TDH, Hmax (ft): @

c. Estimated flowrate, Qcav (gpm) @ Hcav,(ft) : @ at the point where apparent cavitation begins as the flow rate is reduced from Qmax Part 3 – Centrifugal Pump Performance Due to Pump Speed Control

a. Maximum efficiency, η (%) @ pump input power, Pi (watts): @

b. Efficiency, η (%) @ pump speed = 50% of maximum (%):

c. Pump input power savings at 50% pump speed vs. 100% pump speed (%):

d. Savings ($) in electrical costs for the pump operating at 50% pump speed vs. 100% pump speed for one year (assume electricity cost is $0.10/kWh)

CE415L REPORT REQUIREMENTS FOR LAB REPORT FOR EXP 7

Summary page 2 of 2

A. SUMMARY OF RESULTS (CONTINUED)

Name: Group Number: Date of Report: Part 4 – System Curve and Operating Point System A

a. Shut-off TDH, Hshutoff _A(ft) :

b. Operating point flowrate, Qop_A (gpm) @ TDH hfull_A (ft): @ System B

c. Shut-off TDH, Hshutoff_B (ft) :

d. Operating point flowrate, Qop_B (gpm) @ TDH hfull_B (ft): @ Part 5 – Operating Centrifugal Pumps in Series

a. Hp_series (ft) @ Shut-off (0 gpm) @ 0 gpm b. Hp_series (ft) @ maximum flowrate, Qmax (gpm): @ c. Hp_series / Hp_single x 100% @ intermediate flowrate, Q (gpm): @

Part 6 – Operating Centrifugal Pumps in Parallel

a. Hp_parallel @ Shut-off (0 gpm) @ 0 gpm

b. Hp_parallel (ft) @ maximum flowrate, Qmax (gpm): @

B. GRAPHICAL REQUIREMENTS

CE415L REPORT REQUIREMENTS FOR LAB REPORT FOR EXP 7

Part 1 – Centrifugal Pump Performance Curves On a single graph, labeled “Experiment 7 Part 1 – Centrifugal Pump Performance Curves”, plot the following parameters vs. flow rate Q (gpm) for the full range of flow rates tested: • Total pump head (H) in ft • Pump input power (Pi) in Watts • Pump output power (Po) in Watts • Pump overall efficiency (η) in percent • Include in a subtitle of the chart the water temperature (Tw) in the reservoir in °F Part 2 – Centrifugal Pump Performance Due to Inlet Control On a single graph, labeled “Experiment 7 Part 2 – Centrifugal Pump Performance Due to Inlet Control”, plot the following parameters vs. flow rate Q (gpm) for the full range of flow rates tested: • Total pump head (H) in ft • Pump efficiency (η) in percent Part 3 – Centrifugal Pump Performance Due to Pump Speed Control 1. On a single graph, labeled “Experiment 7 Part 3 – Centrifugal Pump Performance Due to Pump Speed Control – Plotted vs. Flow Rate”, plot the following parameters vs. flow rate Q (gpm) for the full range of flow rates tested: • Total pump head (H) in ft from Part 1 of Exp 7 • Total pump head (H) in ft from this part of the experiment • Pump input power (Pi) in Watts • Pump efficiency (η) in percent • Pump speed (N) in percent 2. On a second graph, labeled “Experiment 7 Part 3 – Centrifugal Pump Performance Due to Pump Speed Control – Plotted vs. Pump Speed”, plot the following parameters vs. pump speed N (%) for the full range of flow rates tested: • Flow rate (Q) in gpm • Total pump head (H) in ft • Pump input power (Pi) in Watts • Pump efficiency (η) in percent Part 4 – System Curve and Operating Point On a single graph, labeled “Experiment 7 Part 4 – System Curve and Operating Point”, plot the following parameters vs. flow rate Q (gpm) for the full range of flow rates tested: • Total pump head (H) in ft from Part 1 • Pump efficiency (η) in percent from Part 1 • System head curve (Hsystem = pressure head + elevation head) in ft vs. flow rate Q in gpm from Part 4 System A • System head curve (Hsystem = pressure head + elevation head) in ft vs. flow rate Q in gpm from Part 4 System B

CE415L REPORT REQUIREMENTS FOR LAB REPORT FOR EXP 7

Part 5 – Operating Centrifugal Pumps in Series On a single graph, labeled “Experiment 7 Part 5 – Operating Centrifugal Pumps in Series”, plot the following parameters vs. flow rate Q (gpm) for the full range of flow rates tested. On the y-axis plot • Single pump pressure head (Hp) in ft for a single pump from Part 1 • Series pump pressure head (Hp_series = ΔHp_series_net + ΔHp_series_losses) in ft On the plot, choose a flow rate at about the midpoint of the flow rate range tested and draw a vertical line to intersect both capacity curves. Note the pressure head corresponding to each of the two intersection points. Part 6 – Operating Centrifugal Pumps in Parallel On a single graph, labeled “Experiment 7 Part 6 – Operating Centrifugal Pumps in Parallel”, plot the following parameters vs. flow rate Q (gpm) for the full range of flow rates tested: On the y axis plot • Single pump pressure head (Hp) in ft for a single pump from Part 1 • Parallel pump pressure head (Hp_parallel) in ft (Note: There will be different losses in the two pumps’ discharge pipes making it difficult to get a true picture of the total head of the parallel combination. For the purposes of this analysis compute the pressure head offset needed to adjust the pressure head of the parallel combination to equal the pressure head of the single pump at the shutoff head value. Then adjust all of the computed pressure head values for the parallel pumps by that offset value.) • On the plot, choose a pump pressure head at about the midpoint of the flow rate range tested and draw a horizontal line to intersect both capacity curves. Note the flowrate and pressure head values at each of the two intersection points.