360 Energy Project Financing: Resources and Strategies for Success
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Baseyear Energy Use
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Fraction of Lighting Load kW On Hours Per Year kWh
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9% 2.6 240 622
61% 17.6 1,450 25,474
15% 4.3 2,500 10,800
6% 1.7 6,100 10,541
9% 2.6 8,760 22,703
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Total (100%) 28.8 70,140
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The baseyear demand is 28.8 kW for each of 10 months and 14.4 kW
for each of July and August, bringing the total demand to 317 M-mo.
Post-Retrofit Electricity Use/Demand
After installation of the ECM, the lighting circuit power was re-
measured as in the baseyear. The power draw was 16.2 kW with all
lights on and none burned out. With the same 1% burnout rate as in
the baseyear, the post-retrofit period maximum power would be 16.0
kW (= 16.2 × 0.99). Therefore the post-retrofit annual energy use for
Equation 1 is computed by multiplying the 16.0 kW post-retrofit load
by-the stipulated post-retrofit load/duration data. The computation is
shown below.
Post-Retrofit Energy Use
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Fraction of Lighting Load kW On Hours Per Year kWh
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9% 1.4 240 346
61% 9.8 2,000 19,520
15% 2.4 2,500 6,000
6% 1.0 6,100 5,860
9% 1.4 8,760 12,614
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Total 16.0 44,340
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