Danfoss ADAP-KOOL Drive Programming Manual page 198

3 Parameter Description
3
The difference between the Reference Power at fixed speed and the Actual Power yielded with speed control represent the actual saving.
As value for the fixed speed case, the rated motor size (kW) is multiplied with a factor (set in %) representing the power produced at fixed speed. The
difference between this reference power and the actual power is accumulated and stored. The difference in energy can be read in par. 23-83,
Savings
.
The accumulated value for the difference in power consumption is multiplied with the energy cost in local currency and the investment is subtracted. This
calculation for Cost Savings can also be read in par. 23-84,
{
t
∑
Cost Savings ( Rated Motor Power
=
t
=0
Actual Power Consumption
−
Break even (payback) occurs when the value read in the parameter turns from negative to positive.
It is not possible to reset the Energy Savings counter, but the counter can be stopped any time by setting par. 28-80,
Parameter overview:
Rated Motor Power
Power Reference Factor in %
Energy Cost per kWh
Investment
23-80 Power Reference Factor
Range:
100 %* [0 - 100 %]
23-81 Energy Cost
Range:
1.00 N/A* [0.00 - 999999.99 N/A]
23-82 Investment
Range:
0 N/A* [0 - 999999999 N/A]
198
Cost Savings
Power Reference Factor
∗
Energy Cost } − Investment Cost
×
Parameter for settings
Par. 1-20
Par. 23-80
Par. 23-81
Par. 23-82
Function:
Set the percentage of the rated motor size (set in par.1-20
Power [HP] ) which is supposed to represent the average power yielded at the time running with
fixed speed (before upgrade with variable speed control).
Must be set to a value different from zero to start counting.
Function:
Set the actual cost for a kWh in local currency. If the energy cost is changed later on it will impact
the calculation for the entire period!
Function:
Set the value of the investment spent on upgrading the plant with speed control, in same currency
as used in par.23-81
MG.11.N1.02 - VLT
ADAP-KOOL
.
)
Parameters for readout
Energy Savings
Actual Power
Cost Savings
Energy Cost .
® is a registered Danfoss trademark
®
Drive Programming Guide
Energy
Power Reference Factor , to 0.
Par. 23-83
Par. 16-10/11
Par. 23-84
Motor Power [kW] or par.1-21 Motor