Description | Traditional
Solution | New
Click to read more about: AEO, PID
Control, VVC plus
Savings over timeTo
go beyond simple elimination of the balancing valve and constant
flow applications, closed loop control based on condenser entering
water temperature feedback will significantly increase energy
savings. This variable
speed, variable flow application saves the balancing valve energy
loss and will allow the flow to decrease below the Design flow
whenever the system load is less than design.
Closed loop control optimizes the pumping capacity to match
the system heat rejection load, a great improvement in energy
conservation compared to 2-speed tower fan motors or tower bypass
calculate the potential savings over time, the actual load over time
profile must be known. The load profile indicates the amount of flow the system
requires to satisfy its loads during a typical day, or time period
under study. The diagram
below shows a typical load profile of an HVAC system.
This profile will vary depending on the specific needs of the
system due to geographical location, equipment selection and safety
margins used in the design phase.