Danfoss ADAP-KOOL Drive, Руководство по программированию, Страница: 198 / 262

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,
Energy
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,
Cost Savings .
Cost Savings
=
{
∑
t =0
t
( Rated Motor Power
∗
Power Reference Factor )
−
Actual Power Consumption
×
Energy Cost }
−
Investment Cost
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, Power Reference Factor , to 0.
Parameter overview:
Parameter for settings Parameters for readout
Rated Motor Power Par. 1-20 Energy Savings Par. 23-83
Power Reference Factor in % Par. 23-80 Actual Power Par. 16-10/11
Energy Cost per kWh Par. 23-81 Cost Savings Par. 23-84
Investment Par. 23-82
23-80 Power Reference Factor
Range: Function:
100 %* [0 - 100 %] Set the percentage of the rated motor size (set in par.1-20 Motor Power [kW] or par.1-21 Motor
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.
23-81 Energy Cost
Range: Function:
1.00 N/A* [0.00 - 999999.99 N/A] 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!
23-82 Investment
Range: Function:
0 N/A* [0 - 999999999 N/A] Set the value of the investment spent on upgrading the plant with speed control, in same currency
as used in par.23-81
Energy Cost .
3 Parameter Description ADAP-KOOL ® Drive Programming Guide
198
MG.11.N1.02 - VLT ® is a registered Danfoss trademark
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