Lab 4 Pipe Loop You have a pipe loop as follows (Figure 1, 2 and 3). Your job is to run 4 tests to find flow rate and velocity in the pipe as follows: 1. Run loop, all valves open 2. Close 2, 3, 4 3. Close 1, 2, open 3, 4 4. Close 1-2, open 4 only Calculate the head loss in each scenario. Is the flow the same? Calculate the exit velocity each time. Compare results and discuss. 1 B D 2 3 4 A F E Figure 1. Schematic diagram of pipe loop Figure 2. Pipe loop Figure 3. Pipe loop in operation Table 1: Readings of experiment Case 1 2 3 4 Condition Qtop (Gallons) All valves open 2.7 Close 2,3,4 6.7 Close 1,2 & Open 3,4 2.8 Close 1,2,3 & Open 4 0 QBottom (Gallons) 3.8 0 3.7 6.1 QTop Volume flow through opening on top in Gallons QBottom Volume flow through opening on bottom in Gallons Time - 60 s. To find the volume flow rate (0) divide the flow (convert gallons to m) with time (here it is 60 seconds). In the video, in some places I say 60 minutes, it is an error. We conducted the run for 60 seconds. So, the time is 60 seconds. Table 2: Dimensions of pipe loop Pipe Length Section (inches) f K Velocity e/D (m/s) AB BC CD DE EF 26 26.5 31.5 26 31.5 Material Diameter Flow (inches) rate (0) (m3/s) PVC 1.25 PVC 0.75 PVC 0.75 PVC 0.5 Galvanized 0.25 Steel PVC 0.5 PVC 0.5 FA FC 26.5 26 Lab 4 Pipe Loop You have a pipe loop as follows (Figure 1, 2 and 3). Your job is to run 4 tests to find flow rate and velocity in the pipe as follows: 1. Run loop, all valves open 2. Close 2, 3, 4 3. Close 1, 2, open 3, 4 4. Close 1-2, open 4 only Calculate the head loss in each scenario. Is the flow the same? Calculate the exit velocity each time. Compare results and discuss. 1 B D 2 3 4 A F E Figure 1. Schematic diagram of pipe loop Figure 2. Pipe loop Figure 3. Pipe loop in operation Table 1: Readings of experiment Case 1 2 3 4 Condition Qtop (Gallons) All valves open 2.7 Close 2,3,4 6.7 Close 1,2 & Open 3,4 2.8 Close 1,2,3 & Open 4 0 QBottom (Gallons) 3.8 0 3.7 6.1 QTop Volume flow through opening on top in Gallons QBottom Volume flow through opening on bottom in Gallons Time - 60 s. To find the volume flow rate (0) divide the flow (convert gallons to m) with time (here it is 60 seconds). In the video, in some places I say 60 minutes, it is an error. We conducted the run for 60 seconds. So, the time is 60 seconds. Table 2: Dimensions of pipe loop Pipe Length Section (inches) f K Velocity e/D (m/s) AB BC CD DE EF 26 26.5 31.5 26 31.5 Material Diameter Flow (inches) rate (0) (m3/s) PVC 1.25 PVC 0.75 PVC 0.75 PVC 0.5 Galvanized 0.25 Steel PVC 0.5 PVC 0.5 FA FC 26.5 26