data center pue- guide

All Rights Reserved Data Connections Inc. 2010

Data Center PUE

Where to Start,What to do first!

Data Connections Inc


About PUEPower Usage Effectiveness (PUE)

Power Usage Effectiveness (PUE) is a standard developed by The Green Grid™ consortium to provide a clear answer to the primary issue surrounding energy efficiency within the data center which is how much power is devoted to driving the actual computing/IT components (servers, for example) versus the ancillary support elements such as cooling and lighting. The components of the PUE calculation look at the relationship between "Total Facility Power" (TFP) and "IT Equipment Power" (IEP). TFP is measured at the utility meter for the data center space and includes all of the components required to support the IT load.

At Data Connections, we can help you 1.Baseline your PUE, 2. Make incremental changes to optimize your data center and improve your

PUE.


PUE Project Flow

STEP 1:Instrumentation for Baseline PUE

Step 2 Optimize: Low hanging fruit

Instrumentation output

Step 3 Optimize: Moderately Invasive

Optimization

Step 4 Optimize: Invasive Optimization

Step 5 Optimize: Disruptive Optimization

PUE by mouse click


Minimum Instrumentation required for valid Baseline PUE

IT Load•This is usually the output of the PDU’s

Cooling Load•For CRAC’s this is the power to those CRAC’s and their condensers.•For CRAH’s this is the fan power plus the Chilled Water Energy used by the CRAH’s (involves BTU meters and kW/ton from the CHW plant)•For non‐traditional cooling we have to evaluate on a case by case basis

Load Losses•Loss across PDU’s (need input and output of PDU)•Loss across UPS’s (need input and output of UPS)•Loss across building transformer(s) (need input and output at xfmr)•Depending on the complexity of the DC, a & b can sometimes be combined so that all you need is PDU output and UPS input

Lighting load•This can be metered or calculated

Every data center is different, but this is the core of PUE.


STEP 1:Instrumentation for Baseline PUE

Installed Instrumentation can be Integrated:

•BMI Integration•Other systems or dry contact points


Our Preferred form of instrumentation is a Wireless Mesh Network

System SoftwareStack

Applications

1

802.15.4NetworkStack

2

Optional Path

Optimal Path

Wireless sensors are easy to install an usually do not require downtime.

If installing on PDU’s or other power devices, downtime of one side of the circuit is required.


Sensor Network Components


One Gateway Node serves multiple sensors

• SynapSense Wireless Network (SWN) to Ethernetconnection

• IP addressable

• Secure– Rijndael 128‐bit encryption, password protection, IP address filtering,

blocking features, hardened OS and stack

• External 5VDC Power Adapter, 110‐240VAC (50~60Hz) with battery backup

• Deployed in N+1 topology on top of rack


ThermaNode™: Temperature/Humidity

Internal Sensed Data• Dew Point & Temperature

• Cold Aisle – Rack Top

External Sensed Data

• Up to 6 thermistors– Cold Aisle

• Middle

• Bottom

– Hot Aisle• Top

• Middle

• Bottom

– Under Raised Floor• Reference Temperature

8 Sense Points/ThermaNode


PressureNode: Differential Air Pressure• Collects Air Pressure data and transmits to SWN

• 4 Energizer AA Lithium‐Iron

• Typically 1 per 500 sq ft

¼” hose with diffuser


Instrumentation complete and Baseline PUE is captured


Step 2: Begin Optimization starting with Low Hanging Fruit

Down time unlikely

• Blanking Panels

• Floor leaks

• Automated Floor Tiles

• CRAC Return Optimization

• Hot Air Removal and redirection

• Watch your PUE # drop!!

Simple, reversible, mobile


Low Hanging Fruit‐ Easy installs, quick PUE results

Down time unlikely

• Blanking Panels‐ you know what these are!

• Floor leaks‐Fill Floor leaks and cut‐outs with Foam or Brush• Automated Floor Tiles

– Bring more cold air to hot spots

• CRAC Return Optimization– Send hot air to short cycling CRAC

• Hot Air Removal and redirection– Capture heat from hot areas and send to Starving CRAC


Step 3 for greater resultsModerately Invasive Optimization

Down time possible

• Additional Instrumentation– Increase the amount of instrumentation at server inlet, Under floor pressure, CRAC/Systems monitoring,

• Under Floor blocking and redirection of Conditioned Air

• Networked Power Floor Tiles

Immediate results, reversible


Step 3Moderately Invasive Optimization

Down time possible• Additional Instrumentation

– Increase the amount of instrumentation at server inlet, Under floor pressure, CRAC/Systems monitoring,

• Under Floor blocking and redirection of Conditioned Air • Networked Floor Tiles and Heat Removal

http://www.dataclean.com/p-193-plenaform-baffles.aspx


Step 4 Invasive OptimizationDown time probable

• Optimize Cabinets for Heat Removal

• Adaptive Control of Conditioned Air Systems

• Aisle Containment


Step 4:Invasive OptimizationDown time probable

• Optimize Cabinets for Heat Removal



Adaptive Control of Conditioned Air Systems-•Regulate Fan Speed•Water Temp•Pressure

With Control

After ContainmentBaseline


Cold Aisle Containment –Panels or Curtains



Step 5 :Disruptive OptimizationPlan for Down time

• Clean up cabinet cabling

• Clean‐up of under floor cabling

• Change Cabinet placement

• Re‐design of layout

• Alternative Cooling!


Step 5: Disruptive OptimizationPlan for Down time

• Clean up cabinet cabling

• Clean‐up of under floor cabling

• Change Cabinet placement

• Re‐design of layout

• Alternative Cooling!– Server Emersion Cooling

– CPUs operate reliably at 75° C, and hard drives are reliable at 45° C. Our coolant at 40°C will keep the hard drives below 45° C, and the CPUs below 62° C, a full 13° C cooler than normal. Coolant at 40° C requires little energy to keep at that temperature, unlike the typical method of using chilled water cooled to 10° C to then cool air.

http://www.grcooling.com/wp-content/uploads/2009/06/CableManagement.png


Contact Data Connections Inc

Thank you for viewing the PUE Guide!

For more information or to schedule an onsite visit:

Email : [email protected]

Or call: 704-893-2301

mailto:[email protected]

data center pue- guide

Documents

data center space

power devices

cold air

hot areas

disruptive optimization

pue calculation

equipment power iep

total facility power