Danfoss VLT HVAC Drive FC 100 Series Design Manual page 18

2. Introduction to VLT HVAC Drive
2
3
m /h
%
350 5
300 15
250 20
200 20
150 20
100 20
Σ 100
2.6.6. Better control
If a frequency converter is used for controlling the flow or pressure of a system, improved control is obtained.
A frequency converter can vary the speed of the fan or pump, thereby obtaining variable control of flow and pressure.
Furthermore, a frequency converter can quickly adapt the speed of the fan or pump to new flow or pressure conditions in the system.
Simple control of process (Flow, Level or Pressure) utilizing the built in PID control.
18
Distribution
Hours Power
A - B
1 1
438 42,5
1314 38,5
1752 35,0
1752 31,5
1752 28,0
1752 23,0
8760
MG.11.B7.02 - VLT
Valve regulation
Consumption
kWh
18.615
50.589
61.320
55.188
49.056
40.296
275.064
® is a registered Danfoss trademark
®
VLT HVAC Drive Design Guide
Frequency converter control
Power Consumption
A - C kWh
1 1
42,5 18.615
29,0 38.106
18,5 32.412
11,5 20.148
6,5 11.388
3,5 6.132
26.801