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--- cluster:178 [2019/08/15 13:53]
hmeij07 [Aug Photos]
+++ cluster:178 [2019/09/23 13:03]
hmeij07 [Sept Photos]
@@ 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 16: / Line 16: @@
 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 =====
+You don't get approval for a roughly $250K project without some serious reasons and numbers. To start with an air flow dynamics analysis, and attempted improvements, utterly failed to improve our data center's environment. With the help of [[http://www.feace.com|FEACE]] we next embarked measuring our power consumption and cooling needs. The proposed solution is described above.  The significant improvements are; abandon subfloor cold air delivery, reduce square footage cooled, free cooling below 45 degree ambient air, and much more energy efficient cooling units.
+There are two sources of power and most racks (other than HPCC) are tied into both. Emergency power that comes from the enterprise UPS (with bypass to utility power and backed by gas generator) and plain utility power delivered directly from the power grid. The UPS logs kwh consumed. The utility panels were clamped for a month and consumption logged. The HPCC racks were individually logged using an PDU with amp meter. Since the HPCC is a big variable much effort was spend to assess it's consumption, read the [[cluster:176|HPC Power]] page.
+^  Excley Data Center Loads  ^  total kW  ^
+|  Emergency power backed racks (x2)|  43.5|
+|  HPC Racks|  22 (Peak)|
+|  Storage (rstore)|  2|
+|  GPU expansion|  7|
+^  Sub Total^  74.5 kW^
+|  Expansion Capacity - up to 25% of current load|  18|
+^  Sub Total^  92.5 kW^
+|  Lighting load and building envelope losses|  2|
+^  Total Data Center Cooling Load^  94.5 kW^
+|  Miscellaneous Load - UPS Lossess|  5|
+The total cooling load for the data center space including load values above, and a potential for a 25% capacity increase is approximately – 94.5 kW. The 5 kW load associated with heat loss from the UPS is not factored into the data center cooing load and is planned to be handled separately.
+It is recommended for the purpose of the study to use a total load of approximately 88kw, based
+on the capacity of the proposed cooling units. That would account for enough capacity to handle
+today's load and associated equipment losses with room to grow by approximately 18%. The
+cooling installed would also have the ability to be expandable if additional growth is required
+beyond the 88 kW design limit. The breakdown of the proposed load is as follows:
+^  Proposed Excley Data Center Loads  ^  total kW  ^
+|  Emergency power backed racks (x2)|  43.5|
+|  HPC Racks|  22 (Peak)|
+|  Storage (rstore)|  2|
+|  GPU expansion|  7|
+^  Sub Total^  74.5 kW^
+|  Expansion Capacity - up to 18% of current load|  13|
+^  Sub Total^  87.5 kW^
+|  Lighting load and building envelope losses|  2|
+^  Total Data Center Cooling Load^  89.5 kW^
+|  Miscellaneous Load - UPS Lossess|  5|
 ===== June Meetings =====
@@ Line 147: / Line 202: @@
 Cancelled
+**8/20**
+Meetings moved to Thu afternoon (1pm now vs 7:30am)\\
+New CRAC2 unit on, data center temp dropped 5-7 degrees\\
+Modular wall up\\
+Fire suppressant install next, followed by ceiling\\
+Old CRAC1 demolishing started\\
+**08/22**
+Wall AC units on\\
+Dim switch relocated, network area missing led installed\\
+Old CRAC1 removed\\
+Floor tiles slowly reconfigure, monitor temps\\
+Condenser leak in second unit, new item shipped\\
+Deliver new CRACR1 before move in day\\
+Fire suppression wiring and piping today\\
 ===== Aug Photos =====
@@ Line 163: / Line 237: @@
 {{:cluster:100_2354_small.jpg?nolink&300|}} Charging, R-410A gas only, zeotropic mixture\\
 {{:cluster:100_2378_small.jpg?nolink&300|}} Seriously. Pink! Official industrial color\\
-{{:cluster:100_2369_small.jpg?nolink&300|}} New Hall/Atwater-Excley generator, 450 Kw, 16,000 lbs\\
+{{:cluster:100_2369_small.jpg?nolink&300|}} New Hall/Atwater-Excley generator (green one ;), 450 Kw, 16,000 lbs\\
+{{:cluster:100_2382_small.jpg?nolink&300|}} 08/16/2019 New CRAC2 \\
+{{: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: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\\
+===== 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 \\
+{{: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_2414_small.jpg?nolink&300|}}
+{{:cluster:100_2416_small.jpg?nolink&300|}} Aiy. Drilling asbestos hot tiles \\
+{{:cluster:100_2420_small.jpg?nolink&300|}} 10/19 Startup delayed \\
+{{:cluster:100_2424_small.jpg?nolink&300|}} Cold aisle floor tile replacements\\
-\\
 **[[cluster:0|Back]]**

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