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Water Resources Engineering Project on computing the flow rate in pipes and pressure at each junction node, Lecture notes of Mechanical Engineering

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ENCE 3380 (Water Resources Engineering)
Spring 2020
Mini Project #1 (Assigned on 09/14/2018)
Total Points = 100 (Submission Deadline: beginning of the class on 02/24/2020)
The objective of this project is to compute the flow rate in pipes and pressure at each
junction node using both analytical procedure (e.g., Hardy Cross method) and
commercial software package such as using EPANET. The pipe and junction diagram
along with other necessary data are listed below.
Overview: Water distribution network schematic for a hypothetical neighborhood
consisting of apartments, an office and a school is as shown in the Figure 1. Each section
of the distribution network in the schematic has identified with type of developments to
develop initial estimates of the water demand for the end of the section node. Pipe
diameters for each section of the network are assigned based on the assumption. As part
of this project assignment, you will evaluate the flow through individual pipes and at the
nodes.
Figure 1: Pipe Network Diagram
Use Type Water Demand (ft3/s)
Apartment 0.010
School 0.042
Large Office 0.020
Independent House 0.010
2 Apts, 2 Large Office, 1 School
2 Apts, 6 Ind. Houses
2 Apts , 2 Ind.
Houses
5 Ind. Houses
2000 ft
2000 ft
3500 ft
3500 ft
1
4
1
3
1
2
5
pf2

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ENCE 3380 (Water Resources Engineering) Spring 2020 Mini Project #1 (Assigned on 09/14/2018) Total Points = 100 (Submission Deadline: beginning of the class on 02/24/2020) The objective of this project is to compute the flow rate in pipes and pressure at each junction node using both analytical procedure (e.g., Hardy Cross method) and commercial software package such as using EPANET. The pipe and junction diagram along with other necessary data are listed below. Overview: Water distribution network schematic for a hypothetical neighborhood consisting of apartments, an office and a school is as shown in the Figure 1. Each section of the distribution network in the schematic has identified with type of developments to develop initial estimates of the water demand for the end of the section node. Pipe diameters for each section of the network are assigned based on the assumption. As part of this project assignment, you will evaluate the flow through individual pipes and at the nodes. Figure 1: Pipe Network Diagram Use Type Water Demand (ft^3 /s) Apartment 0. School 0. Large Office 0. Independent House 0. 2 Apts, 2 Large Office, 1 School 5 Ind. Houses 2 Apts, 6 Ind. Houses 2 Apts , 2 Ind. Houses 2000 ft^ 2000 ft 3500 ft 3500 ft 1

Junction/Node Ground Elevation (ft) Tank 280 1 200 2 185 3 190 4 194 Assume C = 100 in Hazen-Williams calculations; Tank maximum, minimum, average and initial levels as 350, 300, 340 and 340 ft , respectively. Task: As a team of two students, design a water distribution system (not considering fire flows) for the above site. Make (and state) necessary assumptions (pipe type and roughness, unit water use, minimum pipe size, etc.). Assume a water inflow rate that is about twice the calculated peak water demand. Do the calculations in the following major steps:

  1. calculate water use (without fire demand) for each pipe length.
  2. assume internally consistent distribution of flow for each node
  3. calculate initial estimate of pipe diameter (using 3 ft/sec velocity)
  4. do Hardy-Cross calculations and use EPANET to determine actual flows in each pipe
  5. calculate pressure at each node (EPANET only)
  6. evaluate the results Deliverables: Prepare a short report (not more than 10 pages) covering the items listed below. Please submit hard copy of the report, electronic copy will not be considered.
  1. List assumptions made and provide appropriate reasons for their use. (5pts)
  2. Detailed calculations of water demand and initial pipe sizes (diameter) of each pipe in the network. (10pts)
  3. Sketch showing initial flows, demand and pipe size calculations. (5pts)
  4. Tables of results for pipes and nodes of hand calculations, including spreadsheet screen shots (if used for calculations). Clearly identify the formulas used and relevant variables of the calculations. (25pt)
  5. EPANET network map showing pipe labels, junction labels and node demands. (5pts)
  6. Tables of results for pipes and junctions of EPANET analysis. (20pts)
  7. EPANET network map showing flow and direction of flow, pipe diameter, demand, velocity, pressure. (10pts)
  8. Discussion of results (including, problems or where design did not meet guidelines for velocity and pressure; discussion of additional EPANET options used (if any), comparison of manual vs. computer analysis). (10pts)
  9. Submit (as a zip file) solved network (both spreadsheet(s), if used, and EPANET network) program files. (10pts)
  10. Professional presentation of the report (arrangement of material). (5pts)