A Bell & Gossett Series e-80 2x2x7B inline pump with a 6½ inch impeller operating at 1750 rpm…

A Bell & Gossett
Series e-80 2x2x7B inline pump with a 6½ inch impeller operating at 1750 rpm is
being used to transfer water at 60°F between two large tanks as shown in Figure

1. All fittings are
standard and the globe valve is fully opened.

a. Write and solve a
simulation for this system and determine its operating point; head (ft),
capacity (gpm), and pump efficiency.

b. Investigate how the
operating parameters are affected by the pump speed over the range 1500 _
rpm _ 3500 in 100 rpm increments. Develop two plots. In the first plot
show the head (ft) vs. capacity (gpm). In the

A Bell & Gossett
Series e-80 2x2x7B inline pump with a 6½ inch impeller operating at 1750 rpm is
being used to transfer water at 60°F between two large tanks as shown in Figure

1. All fittings are
standard and the globe valve is fully opened.

a. Write and solve a
simulation for this system and determine its operating point; head (ft),
capacity (gpm), and pump efficiency.

b. Investigate how the
operating parameters are affected by the pump speed over the range 1500 _
rpm _ 3500 in 100 rpm increments. Develop two plots. In the first plot
show the head (ft) vs. capacity (gpm). In the second plot, show the efficiency
vs. capacity (gpm). For both plots, show the operating points with a symbol.
Label several of the symbols with the corresponding pump operating speed (rpm).