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--- cluster:178 [2019/08/22 13:59]
hmeij07 [Aug Photos]
+++ cluster:178 [2019/12/13 08:37]
hmeij07 [The End]
@@ 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 230: / Line 245: @@
 {{:cluster:pp-crac1-small.jpg?nolink&300|}} Old CRAC1 removed, new frame installed\\
+===== Sept Meetings =====
+**09/05**
+New electrician but critical work coming up\\
+Missing one track sensor\\
+CARC1 installed, piping finish and leak test\\
+New CRAC1 power up 9/19 by Liebert with owner training\\
+Duct work and dampers install today\\
+**09/19**
+Cancelled
+===== Sept Photos =====
+{{:cluster:100_2396_small.jpg?nolink&300|}} 5-6 feet cold aisle \\
+{{:cluster:100_2402_small.jpg?nolink&300|}} Tour Guide on back of modular wall \\
+{{:cluster:100_2407_small.jpg?nolink&300|}} New CRAC1 pressurizing\\
+{{:cluster:100_2409_small.jpg?nolink&300|}} L-room return damper to hot aisle \\
+{{:cluster:100_2410_small.jpg?nolink&300|}} 1of2 L-Room cold air supply damper \\
+{{:cluster:100_2420_small.jpg?nolink&300|}} 10/19 Startup delayed \\
+{{:cluster:100_2424_small.jpg?nolink&300|}} Cold aisle floor tile replacements\\
+{{:cluster:100_2430_small.jpg?nolink&300|}} Old CRAC3 removed, 9/13/2019 \\
+{{:cluster:100_2433_small.jpg?nolink&300|}} Circulation pumps inside Economizer \\
+{{:cluster:100_2449_small.jpg?nolink&300|}} New wall paint job. Thanks! \\
+{{:cluster:100_2451_small.jpg?nolink&300|}} Zeocryte cylinder flock \\
+{{:cluster:100_2456_small.jpg?nolink&300|}}
+{{:cluster:100_2454_small.jpg?nolink&425|}} Old and new fans \\
+{{:cluster:100_2465_small.jpg?nolink&300|}} Vinyl doors and curtains, CRAC1 startup 10/10/2019 \\
+{{:cluster:100_2467_small.jpg?nolink&300|}} Top of racks vinyl curtain \\
+{{:cluster:pp-crac2-vinyl-door.jpg?nolink&300|}} CRAC2 vinyl curtain and door \\
+{{:cluster:pp-hot-aisle-curtain-to-crac2.jpg?nolink&300|}} West hot aisle return to CRAC units \\
+{{:cluster:100_2473_small.jpg?nolink&300|}} U42 rack is 78 3/4" tall, door is 79" \\
+===== The End =====
+Working with PP to see if we can do a floor tile cleaning.
+Scroll up for the whole story backwards.
+Commissioning happening 12/20/2019. Still to be fixed is the floor and the Ethernet cables knock outs.\\
+ --- //[[hmeij@wesleyan.edu|Henk]] 2019/12/13 08:36//
 **[[cluster:0|Back]]**

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