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Table 4 Electric motors retrofitting exercise report for industry B: (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 200 kw, 3000 rpm, 400 V, 89%1No suitable replacement found
2Compressor motor 150 kw, 3000 rpm 400 V, 86%2No suitable replacement found
3Pump 7.5 kw, 1500 rpm, 82% 400 V4131,707.32WEG cast iron motors, 91.7%, 7.5 kw, 1500 rpm, 400 V1485 + 94117,775.3513,931.962006.2038
4Pump 5.5 kw 3000 rpm, 400 v 80%124,750.00WEG motors, top premium 91.2%, 5.5 kw 3000 rpm, 400 V1050 + 8921,710.533039.47437.6831
5Pump 15 kw 3000 rpm pump 400 v, 83%2130,120.48WEG motors, cast iron, 93.3%, 15 kw 3000 rpm pump 400 V.2345 + 138115,755.6314,364.852,068.5429
6Compressor motor 45 kw 1500 rpm, 400 V, 86%2376,744.19Arcelik A.S 95%, 45 kw, 1500 rpm, 400 V.7528 + 248341,052.6335,691.555139.5836
7Compressor motor, 20 kw 1500 rpm, 380–400 V, 84%2171,428.57WEG motor 94.3% 20 kw 1500 rpm, 380–400 V3652 + 148152,704.1418,724.442696.3234
8Compressor motor, 15 kw, 1500 rpm, 380 V, 82%2131,707.32Arcelik A.S 92.5%, 15 kw, 1500 rpm, 380 V.2715 + 138116,756.7614,950.562152.8832
9E-Motor 11 kw, 1500 rpm, 380 V, 85%4186,352.94ABB motor, 92%, 11 kw, 1500 rpm, 380 V.2064 + 110172,173.9114,179.032041.7851
10E-Motor 5.5 kw 1500 rpm 400 V, 79%250,126.58Baldor UK 90.5%, 5.5 kw 1500 rpm 400 V.1175 + 8943,756.916369.68917.2333
11E-Motor 22 kw 1500 rpm, 400 V, 82%2193,170.73WEG motor 22 kW, 94.3%, 1500 rpm, 400 V3652 + 148167,974.5525,196.18 3628.2525
12Pump 11kw, 3000 rpm, 380 V, 82.2%3144,525.55WEG motor, 11 kW, 3000 rpm, 380 V, 93%2022 + 110127,741.9416,783.612416.8432
Total 271,540,633.68   1,377,402.34163,231.3423,505.3