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--- cluster:178 [2019/08/26 15:28]
hmeij07 [Tech Summary]
+++ cluster:178 [2019/08/27 14:10]
hmeij07 [Summary Bullets]
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 **Exley Science Center – 265 Church St. – Data Center HVAC Replacement**
-Replace computer room air conditioning units, replace rooftop condensing units, install new economizer and pump package, install new drop ceiling and lighting, install hot and cold isle containment system.  New system will replace a ~40-year-old system that is critical for the campus IT infrastructure and save 260,000 kWh/yr of electricity (estimated at $35,000 in annual savings).
+Replace computer room air conditioning units, replace rooftop condensing units, install new economizer and pump package, install new drop ceiling and lighting, install hot and cold isle containment system.  New system will replace a ~40-year-old system that is critical for the campus IT infrastructure.
   * Project Schedule: 5/28/19 – 10/1/2019
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 ⦁	ROI of 7-8 years\\
+[[https://www.vertiv.com/en-us/support/tools-applications/free-cooling-economizer-calculator/|Vertiv Free Cooling Calculator]] 80 degree return air (conservative) with 70% load rates full free cooling hours are at 44% for Bridgeport and 48% for Hartford. So the expected 40% lsted aboveis low water mark as that percentage goes up if return air gets hotter. At 85 degree it yields between 53-56%.
 ===== Tech Summary =====

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