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The Economics of Data Center Air Flow Containment.

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Presentation on theme: "The Economics of Data Center Air Flow Containment."— Presentation transcript:

1 The Economics of Data Center Air Flow Containment

2 An Employee-Owned Corporation 800-834-4969 | www.chatsworth.com Course Description This course will explain: 1.The acceptable range of equipment inlet conditions 2.The value of supply air set points versus return air set points 3.The value for maximizing the separation between supply air streams and return air streams. 4.The benefits for maintaining air separation including: elimination of equipment hot spots elimination of bypass and re-circulation waste reduction in fan energy improvements in cooling coil efficiency ability to support trends toward higher rack heat density improvement in chiller plant efficiency access to increased hours of economization cooling increased overall design flexibility

3 An Employee-Owned Corporation 800-834-4969 | www.chatsworth.com Learning Objectives At the end of this program, you will be able to: 1.Discuss the three basic methods for achieving air separation through hot aisle containment, cold aisle containment, and vertical exhaust ducts. 2.State the relative advantages and disadvantages for the different separation topologies along with application appropriateness. 3.Quantify the cost-benefits for a well-designed air flow management. 4.Explain the overall value of good air flow management, and how it can be achieved using design elements that can enable or compromise best results.

4 An Employee-Owned Corporation 800-834-4969 | www.chatsworth.com What is the source of your pain? Hot spots? Cost for energy? Growth and/or technology refresh constrained? High cost of eliminating hot spots or reducing energy costs or positioning for growth?

5 An Employee-Owned Corporation 800-834-4969 | www.chatsworth.com Uptime Institute 2012 Data Center Survey

6 An Employee-Owned Corporation 800-834-4969 | www.chatsworth.com HOT AISLE COLD AISLE HOT AISLE COLD AISLE Bypass airflow under the cabinets Hot air recirculation from the hot aisle into the cold aisle Limitations of Hot Aisle – Cold Aisle

7 An Employee-Owned Corporation 800-834-4969 | www.chatsworth.com 6 The New ASHRAE Recommended Environmental Envelope for Class 1 Electronics What is the target? 2004 Version2008 Version Low End Temperature 20°C (68°F)18°C (64.4°F) High End Temperature 25°C (77°F)27°C (80.6°F) Low End Moisture40% RH5.5°C DP (41.9°F) High End Moisture55% RH 60% RH & 15°C DP (59°F DP)

8 An Employee-Owned Corporation 800-834-4969 | www.chatsworth.com 14 Typical Set Point Management 72°F (22°C) 55°F (13°C)

9 An Employee-Owned Corporation 800-834-4969 | www.chatsworth.com 15 Mixing of supply air and return air in typical data center Typical Set Point Management

10 An Employee-Owned Corporation 800-834-4969 | www.chatsworth.com Hot spots Return air could cool an entire data center Typical Set Point Management 72°F (22°C) 55°F (13°C)

11 An Employee-Owned Corporation 800-834-4969 | www.chatsworth.com 17 All the hot return air is isolated from the supply air No hot spots. No concern about return air temperature. Supply Set Point Management

12 An Employee-Owned Corporation 800-834-4969 | www.chatsworth.com -Completely preventing hot and cold air from mixing -Completely capturing either hot or cold air -100% is probably unrealistic -leakage is important -many design trade-offs -Several design strategies What is Hot Air Isolation

13 An Employee-Owned Corporation 800-834-4969 | www.chatsworth.com

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17 1.Eliminates hot spots 2.Supports 4x higher heat and power densities (6 kW to 30+kW)! 3.Effectively utilizes 100% of supplied air and reduces chilled air waste! 4.Transfers server equipment ΔT directly back to the HVAC unit! 5.Increase chiller efficiency through higher set points! 6.Can increase economization through higher set-points! 7.Allows supply air delivery from ceiling, wall or floor. Benefits of Hot Air Isolation

18 An Employee-Owned Corporation 800-834-4969 | www.chatsworth.com 86 83 81 78 75 72 70 67 64 62 59 Elimination of Hot Spots

19 An Employee-Owned Corporation 800-834-4969 | www.chatsworth.com 1.Eliminates hot spots 2.Supports 4x higher heat and power densities (6 kW to 30+kW)! 3.Effectively utilizes 100% of supplied air and reduces chilled air waste! 4.Transfers server equipment ΔT directly back to the HVAC unit! 5.Increase chiller efficiency through higher set points! 6.Can increase economization through higher set-points! 7.Allows supply air delivery from ceiling, wall or floor. Benefits of Hot Air Isolation

20 An Employee-Owned Corporation 800-834-4969 | www.chatsworth.com High Density Cooling 4 IBM H 8852 Blade Servers 25kW actual heat load 4 HP c7000 Blade Servers 22kW actual heat load

21 An Employee-Owned Corporation 800-834-4969 | www.chatsworth.com 1.Eliminates hot spots 2.Supports 4x higher heat and power densities (6 kW to 30+kW)! 3.Effectively utilizes 100% of supplied air and reduces chilled air waste! 4.Transfers server equipment ΔT directly back to the HVAC unit! 5.Increase chiller efficiency through higher set points! 6.Can increase economization through higher set-points! 7.Allows supply air delivery from ceiling, wall or floor. Benefits of Hot Air Isolation

22 An Employee-Owned Corporation 800-834-4969 | www.chatsworth.com Elimination of Excess Supply Air 600kW IT load 6 Stulz CCD-1800-CWE CRAH units (N+1) Standard Hot Aisle – Cold Aisle Data Center Air handlers operate @ 83% capacity Maximum inlet temperature range = 58.6°F – 79.7°F CRAH fan energy = 32.1 kW or 280,937 kW hours/year Data Center with Hot and Cold Isolation Air handlers operate at 73% capacity Maximum inlet temperature range = 75°F – 76°F CRAH fan energy = 21.6kW or 189,216 kW hours/year 91,721 kW hours energy saved by eliminating need to produce excess bypass supply air

23 An Employee-Owned Corporation 800-834-4969 | www.chatsworth.com 1.Eliminates hot spots 2.Supports 4x higher heat and power densities (6 kW to 30+kW)! 3.Effectively utilizes 100% of supplied air and reduces chilled air waste! 4.Transfers server equipment ΔT directly back to the HVAC unit! 5.Increase chiller efficiency through higher set points! 6.Can increase economization through higher set-points! 7.Allows supply air delivery from ceiling, wall or floor. Benefits of Hot Air Isolation

24 An Employee-Owned Corporation 800-834-4969 | www.chatsworth.com Cooling Unit Supply Air Temperature Return Air Temperature Cooling Capacity Stulz CCD-600-CWE Labeled as 10 Tons 60˚ F 70˚ F7.8 tons 90˚ F15.5 tons 105˚ F20.7 tons Stulz CCD-1800- CWE Labeled as 30 Tons 70˚ F23.0 tons 90˚ F46.0 tons 105˚ F61.3 tons CRAC Efficiency with Supply/Return Isolation Almost a 3x improvement in cooling unit efficiency!

25 An Employee-Owned Corporation 800-834-4969 | www.chatsworth.com 1.Eliminates hot spots 2.Supports 4x higher heat and power densities (6 kW to 30+kW)! 3.Effectively utilizes 100% of supplied air and reduces chilled air waste! 4.Transfers server equipment ΔT directly back to the HVAC unit! 5.Increase chiller efficiency through higher set points! 6.Can increase economization through higher set-points! 7.Allows supply air delivery from ceiling, wall or floor. Benefits of Hot Air Isolation

26 An Employee-Owned Corporation 800-834-4969 | www.chatsworth.com 38% Energy Savings 38% savings = $168,521 1MW example Chiller Efficiency at Higher Set Points Chart from ASHRAE Data Center Design and Operation Book#6: Best Practices for Datacom Facility Energy Efficiency

27 An Employee-Owned Corporation 800-834-4969 | www.chatsworth.com 1.Eliminates hot spots 2.Supports 4x higher heat and power densities (6 kW to 30+kW)! 3.Effectively utilizes 100% of supplied air and reduces chilled air waste! 4.Transfers server equipment ΔT directly back to the HVAC unit! 5.Increase chiller efficiency through higher set points! 6.Can increase economization through higher set-points! 7.Allows supply air delivery from ceiling, wall or floor. Benefits of Hot Air Isolation

28 An Employee-Owned Corporation 800-834-4969 | www.chatsworth.com 538.5kW Load Increase Economization Through Better Separation Between Supply and Return Air

29 An Employee-Owned Corporation 800-834-4969 | www.chatsworth.com 538.5kW Load Increase Economization Through Better Separation Between Supply and Return Air

30 An Employee-Owned Corporation 800-834-4969 | www.chatsworth.com 538.5kW Load Increase Economization Through Better Separation Between Supply and Return Air

31 An Employee-Owned Corporation 800-834-4969 | www.chatsworth.com 1.Eliminates hot spots 2.Supports 4x higher heat and power densities (6 kW to 30+kW)! 3.Effectively utilizes 100% of supplied air and reduces chilled air waste! 4.Transfers server equipment ΔT directly back to the HVAC unit! 5.Increase chiller efficiency through higher set points! 6.Can increase economization through higher set-points! 7.Allows supply air delivery from ceiling, wall or floor. Benefits of Hot Air Isolation

32 An Employee-Owned Corporation 800-834-4969 | www.chatsworth.com Design Flexibility Return Supply

33 An Employee-Owned Corporation 800-834-4969 | www.chatsworth.com Strategies for Air Isolation Hot air isolation (chimney or VED) Cold Aisle Containment (CAC Hot Aisle Containment (HAC)

34 An Employee-Owned Corporation 800-834-4969 | www.chatsworth.com Containment Starts Inside the Cabinet Blanking Panels Floor Tile Cut-out Grommets Cabinet Air Dams

35 An Employee-Owned Corporation 800-834-4969 | www.chatsworth.com Cabinet Air Re-Circulation CFD Model Thermal Imaging Photograph 1 rail set-back = 5+ RMU open space between hot area and cold area

36 An Employee-Owned Corporation 800-834-4969 | www.chatsworth.com 538.5kW Load Cold Aisle Containment

37 An Employee-Owned Corporation 800-834-4969 | www.chatsworth.com Hot Aisle Containment 37

38 An Employee-Owned Corporation 800-834-4969 | www.chatsworth.com 538.5kW Load Hot Air Isolation with Cabinet Vertical Exhaust Duct

39 An Employee-Owned Corporation 800-834-4969 | www.chatsworth.com 538.5kW Load Hybrid Containment with Chimney Cabinets and Hot Aisle Containment

40 An Employee-Owned Corporation 800-834-4969 | www.chatsworth.com

41 What Is the Best Containment? DataCenter 2020: Hot-aisle and Cold Aisle Containment Efficiencies Reveal No Significant Differences Copyright © 2011 Intel Corporation. The DataCenter 2020 is a joint T-Systems and Intel data center test laboratory in the Munich-based Euroindustriepark. www.datacenter2020.com

42 An Employee-Owned Corporation 800-834-4969 | www.chatsworth.com Hot Aisle Containment Easy integration of fire suppression Hot aisle working environment @ 90 – 130 F Flexible supply air delivery architectures Better low density thermal ride-through Raised floor not required Pod deployment Compatible with row-based cooling

43 An Employee-Owned Corporation 800-834-4969 | www.chatsworth.com Cold Aisle Containment Data Center working environment @ 90 - 130 F Better high density thermal ride-through Easier retrofit of working data center Raised floor (usually) Separate volume for fire suppression Pod deployment Possibly sensitive to over-pressure Compatible with row-based cooling

44 An Employee-Owned Corporation 800-834-4969 | www.chatsworth.com Cabinet Containment Working environment @ 74 - 80 F 16 pitch may impact fire suppression Raised floor not required Thermal ride-through (variable dependent) Cabinet deployment 3050 CFM density threshold Flexible supply air delivery architectures

45 An Employee-Owned Corporation 800-834-4969 | www.chatsworth.com Case Study 300kW IT load 2000 square feet 150 watts per square foot 60 cabinets 1,025,567 BTU/hr Case Files

46 An Employee-Owned Corporation 800-834-4969 | www.chatsworth.com 12kW to operate 5 cooling units @ 64% capacity 41.8kW to operate chiller @ 65°F H 2 O leaving temperature 0.06 kW for fresh air (N+1) 0.56kW for electrical room (N+1) 0.06kW for battery room (N+1) 15kW for substation (N+1, but not simultaneously running redundancy 608,119 kW hours per year $60,812 cooling budget at $0.10 per kW hour (1.23 COOLING ONLY PUE) Cooling Cost Roll-up

47 An Employee-Owned Corporation 800-834-4969 | www.chatsworth.com Savings Comparison 44% cooling energy savings over original data center –35.8% reduction in chiller plant energy –73.7% reduction in CRAH fan energy 30% cooling energy savings over optimized hot aisle – cold aisle data center –30.8% reduction in chiller plant energy –52% reduction in CRAH fan energy No economizer in any scenario

48 An Employee-Owned Corporation 800-834-4969 | www.chatsworth.com Benefits of Airflow Management by Containment Eliminates hot spots Suitable for low, medium and high density Eliminates wasted capacity and saves fan energy Improves cooling unit efficiency Supports supply air set points –Reduced chiller plant energy use –Increased free cooling utilization Facilitates greater design and deployment flexibility

49 An Employee-Owned Corporation 800-834-4969 | www.chatsworth.com Questions? Thank You For Your Time Glen ter Horst (708) 990-0798 gterhorst@chatsworth.com This concludes The American Institute of Architects Continuing Education Systems Course


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