Chilled Water Pump Vfd

The building is a large distribution center that primarily uses chilled water for cooling.

Chilled water pump vfd.

Control question added by rashid ali abdul haque senior mechanical engineer bureau veritas. Water differential pressure transmitter near the end of the piping run varies the speed of the vfd. Actually vfd normally used in secondary pump but in some diagram it shows in primary pump so please clarify what is role of vfd in chilled water system and where it used. The selection of this equipment is driven by the individual efficiencies at full and partial loads and also by how the system efficiency will respond to the building loads.

The single primary pump pumps water through the chiller and to the coils. With state of the art compressor technology and microprocessor based control systems manufacturers now offer variable frequency drives specially designed for centrifugal chillers. The existing chilled water system consisted of two variable flow primary chilled water pumps three variable speed cooling fans and three constant volume condenser water pumps. Vfd to maintain a fixed.

The three trane cvhe450 centrifugal chillers also had variable speed compressors. Enable the primary chilled water pump when outside air temperature is above setpoint and at least 1 chilled. A typical chiller plant consists of a chiller or multiple chillers along with chilled water pumps condenser water pumps and cooling towers. Variable frequency drives have been used extensively for air handling unit fans cooling tower fans and water pumps for a long time.