Description | New standard
| Energy Savings
Click here to read more about: AEO, PID
Control, VVC plus
Flow from the primary pumps
is traditionally adjusted by throttling or balancing valves on the
discharge of the pump. The pumps are usually oversized due to the
safety margin in the design and to accommodate future scaling in the
pipework and chiller tubes. By creating pressure and flow loss in
the pumping circuit with the throttling valve, the proper designed
flow rate is established.
Another method to adjust primary pump flow is to trim the pump
impeller. Once the system is operating, the actual pressure drop in
the primary loop can be determined. The pumpís impeller is
removed, trimmed to the proper diameter, balanced, and reinstalled
in the pump. Decreasing the diameter of the impeller reduces both
the capacity and pressure capability of the pump, as desired, but
also has an impact on the pumpís efficiency. The change to the
impeller, of course, is fixed and permanent.
Click on graphic to animate!