ENGR 3345 Lab 6[4841]

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11/22/2022 Nnaemeka Nwosisi Experiment 6: Pump Performance

ENGR 3345 Lab 6 Daniel Smith, Anthony Pound, Evan Pudlo, Nnaemeka Nwosisi Table of Contents Introduction………………………………………………………………………..pg. 2 Procedure…………………………………………………………………………..pg. 2-3 Results……………………………………………………………………………..pg. 3 Graph of data………………………………………………………………………pg. 4 Summary…………………………………………………………………………...pg. 4 Conclusion……………………………………………………………………… .... pg. 4 References………………………………………………………………………….pg. 5

ENGR 3345 Lab 6 Daniel Smith, Anthony Pound, Evan Pudlo, Nnaemeka Nwosisi Introduction The objective of this lab is to determine the operational point and flowrate of a pump. The pump system we used delivers water from a lower reservoir that is open to the atmosphere at ground level to a higher reservoir at an elevation of 3 ft with the use of a 470 ft long, 1 inch diameter pipe made of cast iron. We will neglect all minor losses in this system. In this lab, the Darcy- Weisbach equation will be used to calculate the friction loss and the friction factor will be calculated using the Swamee-Jain equation and Reynold’s equation. Procedure The experiment consists of a three-part procedure. Part 1 consists of priming the pump in preparation for the experiment and is to be completed by the instructor. Part 2 is data collection and is where each data point is to be collected. Part 2 is to be completed by the students. Part 3 is shutting the pump down and is to be completed by the instructor. Data collection is to be done at increments of .1-.5 GPM while the outlet valve is slowly shut. Shutting the outlet valve will decrease the flow rate of the pump, decrease inlet pressure, and increase outlet pressure. The experiment should continue until the outlet valve is nearly fully shut. One group member is to actuate the valve while another observes the flow rate and pressures. The last two members are to record data provided by the other two members. Part 1: Priming the Pump Step 1: Inspect the equipment and ensure all valves are in the correct initial positions. The priming valve should be closed, the intake valve open, and the outlet valve closed. Step 2: Fill the priming tank with water until the level is above the uppermost hose. Step 3: Rotate the emergency shut-off switch clockwise to disengage it. Step 4: Set the display to “Rev” and “Hertz” by pressing the “Esc” button three times. Ensure the display reads “0.0”. Step 5: Set the priming, inlet, and outlet valves to the open position.

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ENGR 3345 Lab 6 Daniel Smith, Anthony Pound, Evan Pudlo, Nnaemeka Nwosisi Step 6: Activate the pump by pressing the green power key on the control pad. Adjust the pump rotational speed by turning the dial on the control pad. Set the unit at approximately 33 Hz. Step 7: Observe water flow post-pump in the uppermost hose and shut the priming valve once the water begins to flow. Part 2: Data Collection Step 1: Set the unit to exactly 40.0 Hz. Step 2: Activate the inlet and outlet pressure meters by pressing the respective power keys. Step 3: Record the flow rate (GPM), inlet pressure (psi), and outlet pressure (psi). Step 4: Slowly close the outlet valve to decrease the flow rate by increments of .1 and record the new flow rate, inlet pressure, and outlet pressure. Step 5: Repeat Step 4 until the valve is nearly closed. Increase the increments as the valve is further shut to maintain stable readings. Part 3: Pump Shutdown Step 1: Close the outlet valve. Step 2: Decrease the unit to 0.0 Hz. Step 3: Switch the pump off by pressing the green power key. Step 4: Engage the emergency shut-off switch by pressing down on it. Results The graph of the system and pump curve intersected at the point (8.55, 3.005026). The operating flow rate was found to be 8.55 gallons per minute and the pump head was 3.018846. The pump is efficient. It is most efficient at higher flow rates and less efficient at lower

ENGR 3345 Lab 6 Daniel Smith, Anthony Pound, Evan Pudlo, Nnaemeka Nwosisi flow rates. This is because the head of the Pump and the System are at different flow rates. They hover around closer to each other at 8 and 9 Gallons per Minute, but below that, the head starts to get further apart. 0 1 2 3 4 5 6 7 8 9 10 0 1 2 3 4 5 6 7 8 9 10 Pump Performance System Curve Polynomial (System Curve) Pump Curve Flow Rate Head Summary As we can see from the graph above, the system and pump curves are drastically different at slower flow rates. As the flow rates increase, we see the curves approach each other and intersect at around 8.55 gallons per minute. This is what we discovered was the operating flow rate or the point where the system and pump are most efficient. Conclusion

ENGR 3345 Lab 6 Daniel Smith, Anthony Pound, Evan Pudlo, Nnaemeka Nwosisi The purpose of this lab was to find an operation point and flow rate for a system. We followed the procedure above and with the data collected we created a graph to best describe the overall system performance. From our results, we found that the system and pump curve intersected at approximately (8.55, 3.0). References Lab 6 Handout by Professor David Lavergne

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