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AMERESCO40
<br />flow Sa+vin s Were DeteLmIned - The energy savings for the Government Center Boiler Replacement were
<br />calculated using eQUEST, which is a DOE2 energy simulation software. The baseline eQUEST input file details
<br />the building components, occupancy schedules, lighting schedules, equipment efficiencies, etc, in order to
<br />establish the building's baseline energy consumption. The modeled energy consumption was compared to,
<br />and adjusted to match, the actual utility bill data. Modifications were then made to the baseline energy model
<br />to simulate the energy savings that result from installing a new high efficiency boiler plant. Savings were also
<br />calculated for implementing an efficient hot water boiler reset schedule.
<br />The results of the savings calculated by the eQUEST energy model are shown below. The calculated energy
<br />usage reduction values are higher than the guaranteed amount due to the application of safety factor.
<br />New Boiler
<br />N�
<br />e m
<br />� �Ip�IC)ANjqMKMWd
<br />5111}B;II�JtlJpl"
<br />�l>A1NkM�Ng1
<br />u w r
<br />"31
<br />January
<br />55,390
<br />55,580
<br />190 199
<br />199
<br />0
<br />6,439 5308
<br />February
<br />50„360
<br />50,530
<br />470) 1 168
<br />168
<br />(0)
<br />5,510 4,720
<br />790
<br />March
<br />63,330
<br />63,530
<br />(200) 220
<br />220
<br />)I•)
<br />5,230 4,317
<br />913
<br />April
<br />71,500
<br />'.. 71.720
<br />220
<br />216
<br />217
<br />(11
<br />4„884
<br />3,925
<br />959
<br />May
<br />80,850
<br />81,100
<br />750)
<br />1 257
<br />258
<br />(0)
<br />4,583
<br />3,471
<br />1,112
<br />lone
<br />100,300
<br />100 60
<br />f260
<br />266
<br />266
<br />(0)
<br />3,460
<br />2,449
<br />1 11
<br />July
<br />106,360
<br />106,620
<br />260)
<br />1 266
<br />767
<br />(0)
<br />3,328
<br />2,305
<br />1,023
<br />August
<br />147,970
<br />103,190
<br />(270)
<br />270
<br />270
<br />1 (0)
<br />1 3,569
<br />2,524
<br />1,045
<br />5e [ember
<br />89870
<br />90120
<br />250)
<br />256
<br />257
<br />0
<br />3863
<br />12
<br />1,051
<br />October
<br />74440
<br />74,670
<br />230
<br />238
<br />238
<br />0
<br />5,01.3
<br />4021
<br />992
<br />November
<br />57,650
<br />57,850�
<br />(2.0.0)
<br />223
<br />223
<br />(1)
<br />5,170
<br />4,280
<br />890
<br />December
<br />S5 560
<br />55 740
<br />(180)
<br />139
<br />139
<br />0)
<br />5,924
<br />5,061
<br />863
<br />'rota,
<br />908,530
<br />911,2 LO
<br />12,6801
<br />226
<br />227
<br />151
<br />57.073
<br />45,493
<br />11,580
<br />Verification of Savings - The M&V approach for the Boiler Replacement ECM is based on FEMP Option A -
<br />Retrofit Isolation with Key Parameter Measurement, The key parameter for this ECM is combustion efficiency
<br />for the new boilers, which was spot measured one (1) time post installation. Once the combustion efficiency
<br />data was acquired, Ameresco took the average efficiency of both boilers at 601/6 load and above, which is when
<br />the majority of the natural gas is consumed. The above 60%load average efficiency is 90.769/o, which is slightly
<br />more efficient than the assumed efficiency used in the eQUEST model of 90.09%. This value was inserted into
<br />the eQUEST energy model to calculate the achieved savings.
<br />The boiler measurement data provided by the boiler contractor, and a summary of the actual savings as
<br />calculated by the energy model, are shown on the following pages. Note: The guaranteed and actual gas
<br />savings are less than the calculated energy savings due to the application of a safety factor.
<br />Hendricks Coun�, IN March 201h, I
<br />City of South (Bend •-- August 27, 2019 43 11. Measurement & Verification
<br />Taqe content is subject to Confidentiality Restrictions"
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