Table 5 Electric motors retrofitting exercise report for industry C (1 kW h = $0.144) for 4800 h use per year
Existing motors | Replacement | ||||||||
|---|---|---|---|---|---|---|---|---|---|
S/N | Existing motors | Qty | Energy consumption of existing motor (kW h/yr) | Proposed motor for replacing the existing motor | Cost of replacement plus cost of Installation ($) | Energy consumption of new motor (kW h/yr) | Energy saved as a result of replacement (kW h/yr) | Cost of energy saved as a result of replacement ($) | Payback period (month) |
1 | Compressor motor 90 kw, 1500 rpm, 380 V, 87% | 4 | 1,489,655.17 | WEG motors 96%, 90 kw, 1500 rpm, 380 V | 11,934 + 496 | 1,350,000.00 | 139,655.17 | 20,110.34 | 30 |
2 | Air compressor motor 75kw, 1500 rpm, 400 V, 89% | 1 | 303,370.79 | Baldor motors 95.4%, 75 kw, 1500 rpm, 400 V | 11,105 + 386 | 283,018.87 | 20,351.92 | 2,930.68 | 47 |
3 | Dam pump 22 kw, 1500 rpm, 400 V, 86% | 7 | 644,651.16 | WEG motors 94.3%, 22 kw, 1500 rpm, 400 V | 3652 + 148 | 587,910.92 | 56,740.24 | 8170.59 | 39 |
4 | Pump 18.5 kw, 1500 rpm, 400 V, 83% | 3 | 240,722.89 | VEM motors 93%,18.5 kw, 1500 rpm, 400 V | 3043 + 143 | 214,838.71 | 25,884.18 | 3727.32 | 31 |
5 | E-motor 11 kw 1500 rpm,400 V, 85% | 10 | 465,882.35 | ABB motor 92%, 11 kw 1500 rpm, 400 V | 1842 + 110 | 430,434.78 | 35,447.57 | 5104.45 | 46 |
6 | Pump 5.5 kw, 1500 rpm, 400 V, 80% | 5 | 123,750.00 | Baldor motor 90.5%, 5.5 kw, 1500 rpm, 400 V. | 1175 + 89 | 109,392.27 | 14,357.73 | 2067.51 | 37 |
Total | 30 | 3,268,032.37 | 2,975,595.55 | 292,436.82 | 42,110.9 | ||||