EPANET is a computer program that performs extended period simulation of hydraulic and water quality behaviour within pressurized pipe networks

                                                         

Afte doing that procedure, we begin drawing our network by using the mouse and the buttons contained on the Map Toolbar shown below. (If the toolbar is not visible then select View >> Toolbars >> Map). First we will add the reservoir. We Click the Reservoir button, and then we click the mouse on the map at the location of the reservoir. Next we will add the junction nodes by click the Junction button and then by clicking on the map at the locations of the junction given at our data sheet. Finally we add the tanks by clicking the Tank button and clicking the map where the tanks should be located.  

                           

                               junction nodes            Reservoir          Tank   pipe   pump  text

 This is how the Network Map Drawing it will look after doing the above procedure  

Next step of the procedure is to add the pipes always according our data sheet. We click on the pipe button and then we click on the first node from the data sheet, we drag the pointer to the second node we want to connect with the first one and we repeat the procedure for all the pipes. From data sheet we had to connect each pipe from start node to end node.

Network Map drawing finished

After placing all the pipes, next step is to Set Object Properties. As objects are added to a project they are assigned a default set of properties. To change the value of a specific property for an object one must select the object into the Property Editor. There are several different ways to do this. If the Editor is already visible then you can simply click on the object or select it from the Data page of the Browser. If the Editor is not visible then you can make it appear by one of the following actions:

· Double-click the object on the map (Node or pipe or tank or reservoir or pump)                                             · Right-click on the object and select Properties from the pop-up menu that appears.                                        · Select the object from the Data page of the Browser window and then click the Browser’s Edit button for each object like the pictures below

          

                                          

       

 DATA FOR THE NETWORK MAP NODE                                 NETWORK TANK DATA

                                     RESERVOIR DATA

                                    PUMP DATA

     

                                   

                                                                         

    PIPE DATA

Next step on the right side of the screen we click on the browser button to add extra setting for our objects like curve data, pattern data, energy data, times  

 

We do the same procedure for all the data on the sheet

                   PATTERN DATA                                                     CURVES DATA

ENERGY

 Global Efficiency                   75

 Global Price                       0.12

 Demand Charge                      0

TIMES

 Duration                           24:00

 Hydraulic Time step         1:0

 Quality Time step                             0:05

 Pattern Time step                         3:00

 Pattern Start                      0:00

 Report Time step                    1:00

 Report Start                       0:00

 Start Clock Time                     0:00 am

 Statistic                          NONE

After finishing all that procedure we are ready to run the analysis we press the run button and the analysis start  

 

If we manage to complete the network map right we should see the above picture

Then we present the graphs required by pressing the graph button and selecting the appropriate nodes, junction depending the requests.

                   System flow variation graph

Estimation of pumping over a year

Total cost per day is 19068.24 GBP. To calculate the total cost per year we multiply tha value x365

=    19068.24 x 365 =         6959953.225 GBP

Graph to present the pressure distribution contours at time 14:00

 

At this map where is red the pressure is at max because three pumps are pumping water to one node only and because that time of the day the request for water at the city is higher than other time the pressure rise up.

Pressure profile graph for nodes 20J, 140J 160J AT 14:00

 

Graph showing the variation of water in tanks

We notice that all tanks were emptier during high pick times from 6:00 to 18:00 and during the night the pumping for refilling start because the its cheaper.

References