what's next in cooling: capacity, containment, & more
DESCRIPTION
This presentation was originally delivered at AFCOM's Data Center World conference in May, 2014 in Las Vegas, Nevada. The presentation discuss the state of cooling and airflow management, and also introduces Upsite's newest solution, AisleLok Modular containment. For more information, please visit http://upsite.com/aislelok-modular-containmentTRANSCRIPT
LARS STRONG, P.E.
What’s Next in Cooling? Capacity, Containment, & More
Agenda
The State of Computer Room Airflow Management Understanding Cooling Utilization and Bypass Airflow The Next Opportunity in Airflow Management:
AisleLok Modular Containment
The State of Airflow Management
2002 Uptime Institute Research
Bypass Airflow* 60%
Hot Spots 10%
Cooling Capacity 2.6x
2013 Upsite Technologies Research
Bypass Airflow* 48%
Hot Spots 20%
Cooling Capacity 3.9x
*More accurately, “Raised Floor Bypass Open Area” in today’s terminology.
The Research
Raised floor
area (sq ft)
# of running cooling units
Raised floor
bypass open
area (%)
Hot spots (%
of cabinets
)
Cold spots (%
of cabinets) (Data from 6 sites)
Proper perforated tile
placement (%)
Cooling Capacity Factor (CCF)
Averages 7,527 8 48% 20% 35% 77% 3.9Minimum 720 2 13% 0% 0% 7% 1.2Maximum 37,00
040 93% 86% 86% 100% 32.0
Recommended
n/a n/a <10% 0% 0% 100% 1.2Conclusion: Inefficient cooling configuration / airflow management is the problem; capacity is not the problem.
But Why?
Cooling capacity is difficult to quantify It’s hard to justify initiatives, determine ROI Mixed messages in the market,
vendor influence No ‘one-size-fits-all’ solution People paying the electric bill
detached from the data center Organizational structure hinders cooling optimization
High Awareness, Low Implementation
• Open holes in the floor
• Blanking panels often missing
• Misplaced perforated tiles
• Gaps between racks
AFM Problems Are An Opportunity•Money
•OpEx Savings•CapEx Savings
•Capacity•Cooling Capacity•Room for IT Equipment
•IT Reliability
•Green Initiatives•CO2 Reduction
“…an average data center could reduce its operating expense by $32,000 annually, simply by improving airflow management.” - Upsite CCF White Paper
The Cooling Capacity Factor (CCF)
A metric Upsite Technologies developed to estimate the utilization of computer room cooling infrastructure.
CCF is a ratio of the total rated cooling capacity to heat load.
CCF: How It’s Calculated
Convert the total rated (stated) cooling capacity to kW, divide by 110% of the IT critical load (kW)
Total rated cooling capacity (210 tons x 3.52) = 739 kW
110% of the IT critical load = 259 kW
CCF = 2.8 (739/259)
Running cooling capacity is 280% of the load
Identify Your Opportunity
CCF
Tons x 3.517 = kWc
Cooling unit capacity Rated capacity at standard conditions (75 deg F, 45%Rh) Capacity goes up with increase in return temperature Capacity goes down with decrease in return temperature
So What’s Next?
The next Opportunity in AFM
Rack Top Baffles
Bi-Directional Doors
Features Benefits
Core benefits of traditional containment at a lower cost
• Lower initial cost and lower total cost of ownership (TCO) • Lower cost allows for wide implementation across multiple
rows or sections.
Easy InstallationCan be self-installed in minutes with minimal use of tools
•Minimal disruption in computer room because no custom construction required•Saves time and money
Off-the-Shelf AvailabilityShips directly off the shelf to end-user.
• Easy to order; no custom measuring required• Ready to install out-of-the-box• No 3rd party engineering, design, or installation required for
set-up
Reusable & ModularFlexible design can be either applied to hot or cold aisles
• Can be reconfigured quickly and easily.• Adapts to your data center as it evolves.
Fire Safety • UL94V flammability rated materials.• Suitable with gaseous fire suppression systems.• Compliance regional/local fire codes will vary greatly.
Computational Fluid Dynamics Modeling
Objective Evaluate various shapes and sizes of physical barriers
for airflow management effectiveness• IT equipment intake air temperature
Over-rack baffles were evaluated on air coming over the top of racks and impacting IT equipment intake air temperature
Geometries Considered
Arc Baffles
Rectangular Baffles
Straight Baffles
12, 15, 18”
10, 14, 18” 10, 14, 18”
0, 30, 60 and 90 degrees from horizontal
18”
Computational Fluid Dynamics Modeling
Max cabinet load 10 kW
Min cabinet load 6 kW
Total heat load 507 kW
Rated cooling capacity 640 kw
3,056 sq ft 9 ft ceiling
Average Maximum IT Inlet TemperatureBa
selin
e
12 A
rc/1
0 Re
ct/0
Baf
15 A
rc/1
4 Re
ct/3
0 Ba
f
18 A
rc/1
8 Re
ct/6
0 Ba
f
90 B
af
Full C
over
84
86
88
90
92
94
96
Arc BafflesRectangular BafflesStraight Baffles
Tem
p (F
)
Simplified CFD Layout Max cabinet load 10 kW (Red) Min cabinet load 6 kW (Blue) Total heat load 462 kW Rated cooling capacity 475 kw 9 ft ceiling
Maximum Rack Inlet Temperature
F10 G10 H10 I10 J10 K10 L10 M10 N10 O10 P10 Q10 R10 S10 T10 U10 V10 W10
X10 Y10 50.0
60.0
70.0
80.0
90.0
100.0
110.0
Rack Inlet Temperature - Top
Baseline
30 Deg Baf
30 Deg Baf 24 In Door
Rack Number
Tem
pera
ture
(Deg
F)
Baseline
Rack Top Baffles Only
Rack Top Baffles and Doors
EC
30 DC
24D
EC
30 DC
24D
EC
30 DC
24D
EC
30 DC
24D
EC
30 DC
24D
EC
30 DC
24D
EC
30 DC
24D
EC
30 DC
24D
EC
30 DC
24D
EC
30 DC
24D
EC
30 DC
24D
C110A C110B C110C C110D C110E C110F C110N C110P C110Q C110R C110S
60
64
68
72
76
80
84
88
81.4
73.8
76.6
73.8 72.871.3 70.5
68.8 69.367.2
68.967.1
74.7 74.2
78.977.4
80.278.6
80.578.8
88.6
77.5
Rack Inlet Temperature - Top
Rack Number
Te
mp
era
ture
De
g F
Existing ConditionsAfter installation of Air Flow Management Components
Avg temperature drop at top of all racks 3.1 degrees F Avg temperature drop top of end racks 9.4 degrees F
Site Data: Global Financial Company
Site Data: Global Financial Company
81.4
75.6
75 73.8
Top Top Top TopEC 24 D 30 DC 30 DC24D
C110A
70
72
74
76
78
80
82 81.4
75.675
73.8
Maximum Rack Inlet Temperature
Te
mp
era
ture
De
g F
Baseline – Existing Conditions
Aisle End Doors 30 Deg Overhead Baf-fles
30 Deg Overhead Baffles and Aisle End
Doors
Adjustable Rack Gap Panel
Extended
Retra
cted
• Attaches magnetically between two racks
• Adjusts to fill in open space between racks (10” up to 60”)
• Available in heights to fit 42U, 45U, and 47U racks
• Blocks exhaust air circulation
• Contains conditioned air
• Supports reduction of bypass airflow
Adjustable Rack Gap Panel
Stranded Capacity of low temperature set pointsLiebert DX Model VH267W 20-Ton Cooling Unit
Environmental Condition
Total(kW)
Latent(kW)
Sensible(kW)
72°F, 45% Rh 67.0 0 67.0
70°F, 48% Rh 64.5 4.8 59.7
Stranded 2.5 4.8 7.3
Stranded (%) 4% 11%
Stranded Capacity from low temperature set pointsLiebert Chilled Water Model 600C CRAH Unit
Cooling capacity increase from 7°F return air increase
Environmental Condition
Total(kW)
Latent(kW)
Sensible(kW)
72°F, 45% Rh 98.0 0 98.0
65°F, 45% Rh 70.0 0 70.0
Stranded 28.0 0 28.0
Stranded (%) 40% 40%
Opportunity for additional early adopters Official Roll-out in late June
Questions?Lars Strong, P.E.
Senior Engineer, Upsite Technologies
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