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How to Make the Most of Your
Computer Room Cooling in 2015
With 2015 plans and goals set, its time to improve both the
effectiveness and efficiency of your computer room cooling.
With 2015 well under way, you’ve got some things to think
about for your facility...
 Demands continue as high as ever for increased data center efficiency, capacity,
and reliability.
 Recovering stranded cooling capacity (i.e. reducing bypass airflow) allows for
increasing computer room density and or reducing operating cost.
 Systems like DCIM and full Containment will continue to be heavily discussed,
but first you should consider simple, practical steps that can make a huge
difference in your efficiency.
 Effectively managing your airflow not only makes your equipment run better, but
it also reduces energy usage, which saves money and reduces your carbon
footprint. We have found that the average data center could save $32,000
annually by taking some of these simple, easy-to-implement steps.
But First…
Let’s discuss the basics.
What is bypass airflow?
 Bypass airflow is any conditioned airflow that does not pass through IT
equipment before returning to a cooling unit.
 The most common source of bypass airflow his unsealed cable openings.
To overcome the bypass airflow lost through cable openings, it obviously
requires you to run more fans/cooling units to provide sufficient conditioned
air to IT equipment .
Learn more in our Bypass Airflow White Paper >>
 Based on a research study
conducted by Upsite
Technologies of 45 data centers
worldwide, we found that the
average data center has nearly 4
times more rated cooling
capacity than IT load.
The average data center has a cooling capacity
nearly 4 times the IT load!
According to PUE…
 As Power Usage Effectiveness (PUE) analysis reveals, the cooling
infrastructure is the largest consumer of power after IT equipment.
 Airflow management (AFM) remains the easiest and lowest-cost way to
improve cooling infrastructure efficiency and capacity.
 However, even if your site makes strides to improve AFM, you must keep up
the efforts and closely manage them over time.
And Now…
Let’s discuss the metrics.
Are you calculating key AFM metrics
monthly?!
6 Key AFM metrics to include in your monthly report:
What is it?
A metric Upsite developed to estimate the utilization of the cooling infrastructure.
What does it mean?
Calculating the CCF is the quickest and easiest way to determine potential gains
to be realized by AFM improvements.
How is it calculated?
By converting the total rated (stated) cooling capacity to kW, and dividing by
110% of the IT critical load (kW).
Metric 1: Cooling Capacity Factor
 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
CCF Rating Interpretation
1.0 to 1.1 There is little to no redundant cooling or room for reducing OpEx.
1.1 to 1.2 The number of running cooling units is very closely coupled to the heat load
in the room.
1.2 to 1.5 There is moderate opportunity for savings from turning off cooling units.
This can often only be done once AFM improvements have been effectively
implemented.
1.5 to 3.0 Most common. These rooms have substantial opportunity to reduce
operating cost, improve the IT environment, and increase the IT load that
can be effectively cooled. Rooms in this range often have significant
stranded cooling capacity that can be freed up by improving AFM.
> 3.0 Have great potential for improvement since the total rated cooling capacity
of running units is at least three times 110% of the IT load.
Metric 1: Cooling Capacity Factor (cont.)
http://www.upsite.com/resources/ccf-sign-up/
Metric 1: Cooling Capacity Factor (cont.)
Calculate your CCF using the free online Cooling Capacity
Factor Calculator:
Perforated tiles and grates should only be located in front of equipment that
requires conditioned air for cooling. The percentage of properly located
perforated tiles and grates should be 100%. Replace all perforated tiles and
grates located in dedicated hot aisles and open spaces with solid tiles.
Metric 2: Perforated Tile & Grate Placement
Helpful Tip: Start with an
infrared temperature survey
(instructions on next slide)
How to conduct an infrared temperature survey
Metric 2: Perforated Tile & Grate Placement
Step 1:
First, use an infrared thermometer to measure the intake air temperatures. If
they are all cool and the ceiling is cool, then there is more conditioned air being
delivered to the aisle than needed.
Step 2:
Add or remove perforated tiles and grates in cold aisles to make all IT
equipment intake air temperatures as low and even as possible.
The primary purpose of a computer room is to provide a stable and
appropriate intake air temperature for IT equipment. As such, computer rooms
are in either of two categories, those with and those without intake air
temperature problems.
Metric 3: IT Equipment Intake Temperatures
Raised floor bypass open area is made up of unsealed cable openings and
penetrations, and perforated tiles placed in hot aisles or open areas. The
percentage of raised floor bypass open area is calculated by dividing the total
bypass open area by the total open area in the raised floor. The percentage of
bypass open area should be less than 10%.
Metric 4: Raised Floor Open Area Percentage
Image courtesy of Tateinc.com
Install blanking panels that seal effectively, with no gaps between panels, in all
open spaces within cabinets. Spaces between cabinets and under cabinets
need to be sealed to retain conditioned air at the IT equipment face and to
prevent hot exhaust air from flowing into the cold aisle. The percentage of
open U spaces filled with blanking panels should be 100%. Close all open
space of the vertical plane of IT equipment intakes. Install blanking panels,
seal under cabinets, and seal between mounting rails and sides of cabinets.
Metric 5: Blanking Panel Utilization
The utilization of rack space is important to understanding how well the
valuable space of a computer room is being utilized. Cooling capacity and
planning are closely related to rack space utilization.
Metric 6: Rack Space Utilization
Something else you need to consider…
In addition to the 6 metrics to monitor regularly, another key aspect of your
overall AFM improvement strategy is to regularly validate your IT cooling
equipment performance. Here’s what to look for:
 Calibration of Cooling Unit Return-Air Temperature and Relative
Humidity Sensors
 Presence of Latent Cooling
 Return Air Temperature vs. Standard Rated Conditions
Manufacturers rate their cooling units on standard return-air
conditions, typically 75 degrees (F) with a 45 percent relative humidity
(RH%). However, since most sites run their cooling units with set
points lower than standard conditions, the rated capacity cannot be
delivered. This results in the very costly condition of more cooling units
running because the cooling unit’s cooling capacity decreases at lower
return-air temperatures.
Return Air Temperature vs. Standard Rated
Conditions
In some configurations, high relative humidity (RH%) and low return
air temperatures can result in condensation forming on cooling unit
coils (i.e. latent cooling). Moisture condensing on cooling unit coils
actually gives off heat that consumes some of a cooling unit’s cooling
capacity, stranding capacity that could otherwise be used to reduce
the air temperature of the supply air to IT equipment.
Presence of Latent Cooling
To accurately assess cooling unit return-air temperatures and latent
cooling conditions, ensure that you regularly calibrate all cooling unit
return-air temperature and relative humidity (RH%) sensors.
Calibration of Cooling Unit Return-Air
Temperature and Relative Humidity Sensors
So now what?
Now it’s time to get started using these steps:
1. Estimate cooling unit utilization with Cooling Capacity
Factor (CCF).
2. Assess implementation of airflow management best
practices.
3. Calculate airflow management metrics.
4. Implement improvements (in the correct order).
5. Maintain with organizational best practices.
Step 1: Determine Cooling Utilization via
the Cooling Capacity Factor (CCF)
Start with our free online Cooling Capacity Factor Calculator at
http://www.upsite.com/resources/ccf-sign-up/
Step 2: Assess Current AFM Initiatives
Raised Floor The Rack The Row
Step 3: Implement Improvements - In The Correct Order!
Implement airflow management initiatives using our 4 Rs methodology, in
the correct order.
Learn more about our 4 Rs Methodology at
http://www.upsite.com/blog/4-steps-optimizing-computer-room-airflow-management/
 Ensure IT and Facilities are coordinated.
 Document processes for personnel
working the room.
 Implement training protocols.
 Clearly state company objectives that
cooling optimization can support.
 Schedule regular assessments.
 Limit access to computer room.
 Centralize decision-making process for changes.
 Regular reporting to senior management (e.g. PUE, CCF, utility bill, other related
trends to track).
 Appoint a ‘cooling czar’ and give them authority.
Step 4: Maintain with Organizational Best
Practices
Conclusion
A computer room is a dynamic environment, so it’s
unrealistic to expect that these key AFM metrics would
not drift over time. Therefore, closely tracking each
will help assure that your cooling infrastructure will be
operating at maximum capacity, maximum reliability,
and the lowest operating cost (and best PUE) in 2015.
Want to learn more?
Download our free Cooling Capacity Factor white paper to find out
how much you could be saving on cooling costs:
Upsite.com/cooling-capacity-factor-white-paper

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How to Make the Most of Your Computer Room Cooling in 2015: Cooling and Airflow Management Update

  • 1. How to Make the Most of Your Computer Room Cooling in 2015 With 2015 plans and goals set, its time to improve both the effectiveness and efficiency of your computer room cooling.
  • 2. With 2015 well under way, you’ve got some things to think about for your facility...  Demands continue as high as ever for increased data center efficiency, capacity, and reliability.  Recovering stranded cooling capacity (i.e. reducing bypass airflow) allows for increasing computer room density and or reducing operating cost.  Systems like DCIM and full Containment will continue to be heavily discussed, but first you should consider simple, practical steps that can make a huge difference in your efficiency.  Effectively managing your airflow not only makes your equipment run better, but it also reduces energy usage, which saves money and reduces your carbon footprint. We have found that the average data center could save $32,000 annually by taking some of these simple, easy-to-implement steps.
  • 4. What is bypass airflow?  Bypass airflow is any conditioned airflow that does not pass through IT equipment before returning to a cooling unit.  The most common source of bypass airflow his unsealed cable openings. To overcome the bypass airflow lost through cable openings, it obviously requires you to run more fans/cooling units to provide sufficient conditioned air to IT equipment . Learn more in our Bypass Airflow White Paper >>
  • 5.  Based on a research study conducted by Upsite Technologies of 45 data centers worldwide, we found that the average data center has nearly 4 times more rated cooling capacity than IT load. The average data center has a cooling capacity nearly 4 times the IT load!
  • 6. According to PUE…  As Power Usage Effectiveness (PUE) analysis reveals, the cooling infrastructure is the largest consumer of power after IT equipment.  Airflow management (AFM) remains the easiest and lowest-cost way to improve cooling infrastructure efficiency and capacity.  However, even if your site makes strides to improve AFM, you must keep up the efforts and closely manage them over time.
  • 8. Are you calculating key AFM metrics monthly?!
  • 9. 6 Key AFM metrics to include in your monthly report:
  • 10. What is it? A metric Upsite developed to estimate the utilization of the cooling infrastructure. What does it mean? Calculating the CCF is the quickest and easiest way to determine potential gains to be realized by AFM improvements. How is it calculated? By converting the total rated (stated) cooling capacity to kW, and dividing by 110% of the IT critical load (kW). Metric 1: Cooling Capacity Factor  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
  • 11. CCF Rating Interpretation 1.0 to 1.1 There is little to no redundant cooling or room for reducing OpEx. 1.1 to 1.2 The number of running cooling units is very closely coupled to the heat load in the room. 1.2 to 1.5 There is moderate opportunity for savings from turning off cooling units. This can often only be done once AFM improvements have been effectively implemented. 1.5 to 3.0 Most common. These rooms have substantial opportunity to reduce operating cost, improve the IT environment, and increase the IT load that can be effectively cooled. Rooms in this range often have significant stranded cooling capacity that can be freed up by improving AFM. > 3.0 Have great potential for improvement since the total rated cooling capacity of running units is at least three times 110% of the IT load. Metric 1: Cooling Capacity Factor (cont.)
  • 12. http://www.upsite.com/resources/ccf-sign-up/ Metric 1: Cooling Capacity Factor (cont.) Calculate your CCF using the free online Cooling Capacity Factor Calculator:
  • 13. Perforated tiles and grates should only be located in front of equipment that requires conditioned air for cooling. The percentage of properly located perforated tiles and grates should be 100%. Replace all perforated tiles and grates located in dedicated hot aisles and open spaces with solid tiles. Metric 2: Perforated Tile & Grate Placement Helpful Tip: Start with an infrared temperature survey (instructions on next slide)
  • 14. How to conduct an infrared temperature survey Metric 2: Perforated Tile & Grate Placement Step 1: First, use an infrared thermometer to measure the intake air temperatures. If they are all cool and the ceiling is cool, then there is more conditioned air being delivered to the aisle than needed. Step 2: Add or remove perforated tiles and grates in cold aisles to make all IT equipment intake air temperatures as low and even as possible.
  • 15. The primary purpose of a computer room is to provide a stable and appropriate intake air temperature for IT equipment. As such, computer rooms are in either of two categories, those with and those without intake air temperature problems. Metric 3: IT Equipment Intake Temperatures
  • 16. Raised floor bypass open area is made up of unsealed cable openings and penetrations, and perforated tiles placed in hot aisles or open areas. The percentage of raised floor bypass open area is calculated by dividing the total bypass open area by the total open area in the raised floor. The percentage of bypass open area should be less than 10%. Metric 4: Raised Floor Open Area Percentage Image courtesy of Tateinc.com
  • 17. Install blanking panels that seal effectively, with no gaps between panels, in all open spaces within cabinets. Spaces between cabinets and under cabinets need to be sealed to retain conditioned air at the IT equipment face and to prevent hot exhaust air from flowing into the cold aisle. The percentage of open U spaces filled with blanking panels should be 100%. Close all open space of the vertical plane of IT equipment intakes. Install blanking panels, seal under cabinets, and seal between mounting rails and sides of cabinets. Metric 5: Blanking Panel Utilization
  • 18. The utilization of rack space is important to understanding how well the valuable space of a computer room is being utilized. Cooling capacity and planning are closely related to rack space utilization. Metric 6: Rack Space Utilization
  • 19. Something else you need to consider… In addition to the 6 metrics to monitor regularly, another key aspect of your overall AFM improvement strategy is to regularly validate your IT cooling equipment performance. Here’s what to look for:  Calibration of Cooling Unit Return-Air Temperature and Relative Humidity Sensors  Presence of Latent Cooling  Return Air Temperature vs. Standard Rated Conditions
  • 20. Manufacturers rate their cooling units on standard return-air conditions, typically 75 degrees (F) with a 45 percent relative humidity (RH%). However, since most sites run their cooling units with set points lower than standard conditions, the rated capacity cannot be delivered. This results in the very costly condition of more cooling units running because the cooling unit’s cooling capacity decreases at lower return-air temperatures. Return Air Temperature vs. Standard Rated Conditions
  • 21. In some configurations, high relative humidity (RH%) and low return air temperatures can result in condensation forming on cooling unit coils (i.e. latent cooling). Moisture condensing on cooling unit coils actually gives off heat that consumes some of a cooling unit’s cooling capacity, stranding capacity that could otherwise be used to reduce the air temperature of the supply air to IT equipment. Presence of Latent Cooling
  • 22. To accurately assess cooling unit return-air temperatures and latent cooling conditions, ensure that you regularly calibrate all cooling unit return-air temperature and relative humidity (RH%) sensors. Calibration of Cooling Unit Return-Air Temperature and Relative Humidity Sensors
  • 23. So now what? Now it’s time to get started using these steps: 1. Estimate cooling unit utilization with Cooling Capacity Factor (CCF). 2. Assess implementation of airflow management best practices. 3. Calculate airflow management metrics. 4. Implement improvements (in the correct order). 5. Maintain with organizational best practices.
  • 24. Step 1: Determine Cooling Utilization via the Cooling Capacity Factor (CCF) Start with our free online Cooling Capacity Factor Calculator at http://www.upsite.com/resources/ccf-sign-up/
  • 25. Step 2: Assess Current AFM Initiatives Raised Floor The Rack The Row
  • 26. Step 3: Implement Improvements - In The Correct Order! Implement airflow management initiatives using our 4 Rs methodology, in the correct order. Learn more about our 4 Rs Methodology at http://www.upsite.com/blog/4-steps-optimizing-computer-room-airflow-management/
  • 27.  Ensure IT and Facilities are coordinated.  Document processes for personnel working the room.  Implement training protocols.  Clearly state company objectives that cooling optimization can support.  Schedule regular assessments.  Limit access to computer room.  Centralize decision-making process for changes.  Regular reporting to senior management (e.g. PUE, CCF, utility bill, other related trends to track).  Appoint a ‘cooling czar’ and give them authority. Step 4: Maintain with Organizational Best Practices
  • 28. Conclusion A computer room is a dynamic environment, so it’s unrealistic to expect that these key AFM metrics would not drift over time. Therefore, closely tracking each will help assure that your cooling infrastructure will be operating at maximum capacity, maximum reliability, and the lowest operating cost (and best PUE) in 2015.
  • 29. Want to learn more? Download our free Cooling Capacity Factor white paper to find out how much you could be saving on cooling costs: Upsite.com/cooling-capacity-factor-white-paper