Question

If the pressure at Node 1 is 45 psi, what is the pressure at Node 3 (in psi)? Neglect minor losses and the effect of differences in velocities at the two nodes. Begin by writing the general energy balance equation for flow between the two nodes, in variable form, define the variables, state assumptions, and then insert numbers in to the simplified equation that results.

           Elevation                 Flowrate        Diameter                                                                              Length

Node1 190 ft                       400gpm        Pipe 1: 12 inch                 Headloss1.         2.49                2500

Node 2 180ft                       250gpm        Pipe 2: 10inch                  Headloss 2.      1.79                   2000

Node 3 140ft                      500gpm          Pipe 3: 10 inch                Headloss 3:       0.54                    3000

Node 4 165ft                      700 gpm         Pipe 4: 12inch                 Headloss4.          3.74                2000

Answer 1