Advanced Energy Efficiency, Lecture 2: Industry - Rocky Mountain ...

Common pump errors
◊ Oversized pumps for “flexibility”: better to specify
the right size now, but design for changes later
Specify pad and geometry to accommodate other sizes
◊ Constrained entering and leaving conditions
Pipe bends & fittings cause turbulence, miss bull’s-eye
Use ≥5 diameters’ clear pipe run on inlet, ≥3 outlet
◊ Unnecessary friction-causing fittings
Bends, end suction diffuser, triple-duty valve
◊ If pipes look neat, they’ll lose money
NB: If you can retrofit a system to reduce the flow
through the same pipe, this effectively oversizes
the pipe, greatly reducing friction (nearly ∝ d –4.8 )—
and energy use falls roughly as flow 3 × friction!
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