Corrigo ventilation 3.4 manu
Manual Corrigo Ventilation, revision R Chapter 18 Other functions 113
18.8 Energy calculation
The total energy consumption of the air handling unit can be obtained by internally calculating the
various partial outputs of system components. By combining the various outputs of heaters/coolers,
fans, etc., current power consumption is calculated based on their combined output.
18.9 SFP (Specific Fan Power)
If fans are used that are controlled by frequency converters connected via Modbus and which also
supply information on motor output, the Corrigo is capable of calculating SFP using the following
formula:
SFP = Total effect from both fans / Supply air fan flow in kW /
(m
3
/s).
“Extra pressure transmitter supply air” is always used to measure flow, if connected. Otherwise
”SAF Pressure” will be used or, alternatively, ”SAF Pressure 2” if fan control is ”Frequency control
SAF with EAF flow control”.
Power loss as a percentage of the frequency converter can be added for calculating the total output.
If, for instance, power loss is 5 %, the total output will be as follows:
Total output = (Supply air fan output + Extract air fan output)
x 1.05.
A daily and a monthly average (always 30 days) are also computed and presented in the display and
in E tool
©
. SFP for the average values is calculated only when the unit is running.
The display image is located under the menu Running modeRunning mode unit:
SFP: 0.0 kW/m3/s
Day: 0.0 kW/m3/s
Month: 0.0 kW/m3/s
Freq loss: 0 %