Q3 (30 pts): The three-loop water distribution system shown in the figure below is not functioning effectively. The demand for water at junction F is being met, but the required

pressure by the industrial customer is 185 kPa. Therefore, the water company has decided to increase the diameter of one pipe in the network by 5 cm. Determine which pipe should be replaced to have the greatest impact on the pressure in the system, specifically the pressure at node F. (Hint: examine the output table for head losses, flow rates, and pipe sizes. One pipe stands out as the best choice, although there is a second pipe that is only slightly worse.) Part A: Create an EPANET model for the (unmodified) pipe network presented in the figure below using the given demands and pipe specifications. Comment on how close your EPANET results for flow rates and pressures at each node to those presented in the table below. Please provide some explanation for the possible sources of differences between the results. Part B: Using EPANET, replace a pipe of your choice (increase the diameter by 5 cm) and determine the pressure change at node F. Provide a brief justification for your final desing. For both parts, please include a screenshot of your final results in the EPANET (i.e., showing flows and pressures) model to accompany your discussion. Submit the EPANET models as part of your .zip folder. Q=300 Pipe AB AD BC 95 BG GH CH DE GE EF HF D 205 Flow (m³/sec) 95 0.20 0.10 0.08 0.12 0.02 0.03 0.10 0.00 0.10 0.05 Length (m) 125 300 250 350 125 350 125 300 125 8 E 350 125 B G Q = 100 80 Q = 150 Figure 3: Diagram of the water distribution network with the flow rates of each pipe and the demands at each node. Diameter (m) 23 Table 2: Properties and flow rates for the pipes in the water distribution system. 0.30 0.25 0.20 0.20 0.20 0.20 0.20 0.15 0.20 0.15 33 3 87 30 elD 63 0.00087 0.00104 0.00130 0.00130 0.00130 0.00130 0.00130 0.00173 0.00130 0.00173 Q = 50 H ƒ 0.019 0.020 0.021 0.021 0.021 0.021 0.021 0.022 0.021 0.022 K (sec²/m³) 194 423 1,900 678 1,900 678 1.630 2,990 1,900 2,990