Over 50% reduction in electricity consumption
|
Example with variable delivery over 1 year
This example was calculated using a 45 kW pump in an installation supplying variable delivery (see table) at an average of just over 200 m3/h.
Frequency converter control reduced annual electricity consumption by over 50%, from 275,064 kWh to 124,173 kWh.
The return on investment in this example is for a little over one year. |
M3/h |
Breakdown |
Valve control
|
Frequency converter control |
|
% |
hours |
kW |
kWh |
kW |
kWh |
350 |
5 |
438 |
42.5 |
18,615 |
42.5 |
18,615 |
300 |
15 |
1,314 |
38.5 |
50,589 |
29.0 |
38,106 |
250 |
20 |
1,752 |
35.0 |
61,320 |
18.5 |
32,412 |
200 |
20 |
1,752 |
31.5 |
55,188 |
10.0 |
17,520 |
150 |
20 |
1,752 |
28.0 |
49,056 |
6.5 |
11,388 |
100 |
20 |
1,752 |
23.0 |
40,296 |
3.5 |
6,132 |
Total |
100 |
8,760 |
|
275,064 |
|
124,173 |
|
