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Table 3 Electric motors retrofitting exercise report for Industry A: (1 kW h = $0.144) for 4800 h of use per year

From: Retrofitting existing buildings to reduce electrical energy consumption and greenhouse gas emission in Nigerian food and beverage industries

Existing motorsReplacement
S/NExisting motorsQtyEnergy consumption of existing motor (kW h/yr)Proposed motor for replacing the existing motorCost 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)
1Compressor motor 90 kw, 84% eff, 1500 rpm, 380 V2771,428.57ABB motors (M3BP280) 90 kw, 95.2% eff, 1500 rpm, 380 V11,934 + 496680,672.390,756.30 13,068.923
2Air compressor motor 75 kw, 90%, 1500 rpm, 380 V1300,000.00 Teco motors (advantage M11 series) 75 kw, 95% eff, 1500 rpm, 380 V 10212 + 386284,210.515,789.472,273.756
3E-Motor 7.5 kw, 80%, 1500 pm, 380 V12405,000.00Baldor UK motors, (EMM3774-65) 90.7%, 7.5 kw, 1500 pm, 380 V1842 + 110357,221.647,778.396880.0941
4E-motor 5.5 kw, 82%, 1500 pm, 400 V8193,170.73Baldor UK (Emm3770-58) 5.5kw, 90.5%, 1500 pm, 400 V1060 + 89175,027.618,143.112612.6142
5Pump 11 kw, 86.2%, 3000 rpm, 400 V145,939.68WEG motor cast iron top premium 93%, 11 kw, 3000 rpm, 400 V1810 + 11042,580.73359.03483.7048
6Pump 11 kw, 1500 rpm, 84%, 400 V5235,714.29WEG motor top premium 92.6%, 11kw, 84%, 400 V.1850 + 110213,822.921,891.393152.3637
7Compressor 37 kw, 400 V, 1500 rpm, 84%1158,571.43  140,358.318,213.162622.6924
Total302109,824.691,893,893.84215,930.8531,094.0