362 Energy Project Financing: Resources and Strategies for Success
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Baseyear – Post-Retrofit + Adjustment = Savings
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Electricity 70,140 – 44,340 + 9,670 = 35,470 kWh
Electric 317 – 176 + 0 = 141 kW-mo
Demand
Gas 2,940,000 – 2,943,000 + 0 = –3000 ft^3
(83,250) (83,340) (-84.95 m^3 )
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Subsequent years’ savings will be computed identically, from each
year’s measured load on the same electrical panel.
Note that in this example the savings reported are for operations
under post-retrofit period conditions. Therefore the savings can be
called “avoided energy use.”
Option B Example: Boiler Replacement
Situation
An office building boiler is replaced with a more efficient boiler.
95% of the load on the boiler is for building heating while 5% is for do-
mestic water heating. There are no changes other than an improvement
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Baseyear Energy Use at Stipulated At Baseyear Adjust-
Post-Retrofit Conditions Conditions ment
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Fraction of kW On Hours kWh kWh kWh
Lighting Load Per Year
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9% 2.6 240 622 622
61% 17.6 2,000 35,144 25,474
15% 4.3 2,500 10,800 10,800
6% 1.7 6,100 10,541 10,541
9% 2.6 8,760 22,703 22,703
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Total 128.8 179,8101 70,140 9,670
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