Differences

This shows you the differences between two versions of the page.

--- cluster:178 [2019/08/22 17:46]
hmeij07 [Aug Meetings]
+++ cluster:178 [2019/08/27 14:10]
hmeij07 [Summary Bullets]
@@ Line 6: / Line 6: @@
 **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
@@ Line 17: / Line 17: @@
 The HPCC is in the top row of racks on the left (room for 3 additional racks, light yellow dots, 5 existing racks, dark yellow dots).
+===== Summary Bullets =====
+⦁	Replace computer room air conditioning units (CRAC, Liebert DSE DA085)\\
+⦁	Replace rooftop condensing units\\
+⦁	Install new economizers and pump packages\\
+⦁	Install new drop ceiling and lighting (LED) with dim switch\\
+⦁	R-410A refrigerant, "free cooling" with ambient air 45 degrees or less (about 3,578 hours/yr or ~40% )\\
+⦁	Reduce  square footage for rack servers (L-Room normal room temperature), from 28x17 to 22x11 tiles, or ~50%\\
+⦁	Install hot and cold isle containment system (vinyl curtains)\\
+⦁	Abandon sub floor cold air delivery (push cold air above floor)\\
+⦁	Total load of approx 88 Kw (~20% growth, 45 Kw for ITS, 25 Kw for HPCC)\\
+⦁	Save approx 260,000 Kwh/yr of electricity (estimated at $35,000 /yr in savings)\\
+⦁	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 =====
@@ Line 226: / Line 241: @@
 {{:cluster:100_2389_small.jpg?nolink&300|}} 08/19/2019, Temp dropped 5-7F\\
 {{:cluster:100_2385_small.jpg?nolink&300|}} Modular wall up (back side)\\
-{{:cluster:100_2387_small.jpg?nolink&300|}} Front, edges will connect with vinyl curtains)
+{{:cluster:pp-crac2-small.jpg?nolink&300|}} Front, wall edges will connect with vinyl curtains)\\
+{{:cluster:pp-crac2-cold-aisle-small.jpg?nolink&300|}} Cold aisle looking at CRAC2\\
+{{:cluster:pp-crac1-small.jpg?nolink&300|}} Old CRAC1 removed, new frame installed\\
-\\
 **[[cluster:0|Back]]**

DokuWiki

User Tools

Site Tools

Differences

Page Tools