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<br />Two (2) existing chillers were removed completely and replaced with two (2) new 96 Ton capacity R-410a
<br />packaged screw chillers. Properly sized refrigerant piping was installed from the new chillers to the existing air-
<br />cooled condensers. The air-cooled condensers were properly modified to accept R-410a refrigerant. Existing
<br />chilled water piping was modified to accommodate the new chillers. New fiberglass insulation with PVC
<br />wrapping was installed on the existing chilled water piping. New primary and secondary chilled water pumps
<br />were installed.
<br />How Savitl s Were Detern3ined — The energy savings for the Government Center Chiller 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 new, more efficient chillers. The Coefficient of
<br />Performance was increased from 3.45 to 4.0 as a result of replacing the existing reciprocating chillers with new
<br />screw chillers.
<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.
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<br />Hendricks County, IN March 20",, 2019
<br />Page 14
<br />City of South Bend --August 27, 2019 46 11, Measurement & Verification
<br />Tage content is subject to Confidentiality Restrictions"
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