bill santucci

7/28/2019 Bill Santucci

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An Expanded Role of the Rack in theFuture-Proofing of a Data Center


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Cyclical nature of the Datacenter industry

Server Capacities increase (Compute Density)

Power Demands increase (Power Density)

Cooling Capacity depleted (Cooling Capacity)

Each trend has an impact on the needs of the enclosure.


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The traditional role of the enclosure:

Simple Protection for Mounted Equipment

Security / Restricted Access to Equipment

Internal Cable Management

Flood Cooling or Hot / Cold Aisle Deployment

Overview


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Todays role of the Data Center enclosure:

Intelligent security systems

Power & real time monitoring

Cable Management internal & external of Enclosure

Cooling considerations / designs

Integral part of the building infrastructure

Overview


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Future-Proofing = Planning

A unique best practice is to select a single enclosure platform whichwill allow you to utilize a number of accessories and techniques whenand where needed throughout the lifespan of your data center.

From a traditional low density deployment in a traditional hotaisle/cold aisle to the use of a closed loop water cooled system, thisapproach will allow your data center to grow, as needed without

removing any equipment (or enclosures) from service during datacenter upgrades.

The right platform can outlive the data center itself allowing you tofuture-proof your enclosure requirements.

The enclosure must be an integral part of the Data Center design.It must not be thought of as an accessory to be purchased after theData Center is designed or constructed.


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Future-Proofing = Planning Advanced cooling techniques:

Ducted Cooling, Containment, Enclosure Heat Exchangers,

Economized Cooling, all need special considerations.

Flood cooling or Open Hot Aisle / Cold Aisle are costly & inefficient.

ASHRAE new IT equipment intake Temp. Range

Allows you to raise your Temp. set point = cost reductions

only when measures are taken to eliminate recirculation / bypass air flow

2004 Version 2008 Version

Low End Temp. 68 F (20 C) 64.4 F (18 C)

High End Temp. 77 F (25 C) 80.6 F (27 C)

Low end Moisture 40% RH 41.9 F D.P. (5.5 C)

High End Moisture 55% RH 60% RH & 59 F D.P. (15 C)


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A unique bestpractice is to select asingle enclosureplatform which willallow you to utilize anumber of accessories

and techniques whenand where neededthroughout the lifespanof your data center.

Future-Proofing

Appl ications that are server only the 24 wide enclosure is recommended

48 Deep enclosures becoming a trend for high density applications with 4 or more PDUs

Enclosure Size Considerations


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Power Considerations: Type of PDU

Unmonitored Monitored

IP addressable Remote shutdown Event notification

Type of power 110 or 220 VAC

3 phase Most cost effective

Mounting options Mounting bracket

Button mount Snap-fit mount

Physical Space Requirements

Qty of PDUs Up 4 or more in one rear corner

Monitored PDU

Unmonito red PDU

UniversalMountingBrackets


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Grounding protection for your equipment: Isolated vertical copper bus bars to fully ground the equipment Fully ground the enclosure to a common ground

Grounding the cabinet does not ground the equipment

Electrically Isolated Mounting

Enclosure Doors & Panels

to be Electrically connectedto common ground

PowerConsiderations:


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Cable Management Considerations:Outside the Enclosure:

The enclosure can eliminate the need for suspended cable troughs


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Cable Management Considerations:Outside the Enclosure:

The enclosure can eliminate the need for suspended cable troughs


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Overhead Cable Management

Enclosures Can Provide Mounting Surfaces :

Ladder Rack Adapter Brackets

Overhead Cable Troughs


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Cable Management Considerations:Inside the Enclosure

Vertical Cable Troughs


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Cable Management Considerations:Inside the Enclosure


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Cooling Considerations


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Cooling ConsiderationsHot Aisle / Cold Aisle


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Preventing BypassSeal the Gaps, for Conditioned Air

Sealing access-holes in raised floorMaintains static pressure in raised floor and reduces amount ofparticulate build-up under raised floor

Filler / Blanking Panels

prevents re-circulation and by-pass air within the enclosure above &below the equipment

Brush Grommet KitsPrevents by-pass airflow around the equipment within the enclosureby sealing the rails to the side panels & still have cable access.

Raised Floor

Cable Access Grommets

Tool less Filler Panels

Brush Grommet Kit


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Side to Side airflow

30 wide enclosure with internal side panels Provides cable management along outside of rails

Side Airflow Plenum Kit Creates a side intake for equipment Exhausts hot air toward the hot-aisle

Kit assembly Air dam installed along exhaust rail (top to bottom) Air dam installed along front and rear

intake side (with a channel in front air intake)

Air dam constructed of brush grommet provides cable management

Kit is fully customizable Supports multiple side-to-side airflow

equipment in the same enclosure.

intake sideexhaust si de

Cisco 9500 MDS @ 80o F


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Standard Hot Aisle / Cold Aisle

Front & Rear Vented Doors

(Optional fan assisted.)

63 - 68 F in Cold Aisle

65 - 72 F at server intake

90 - 95 F at server exhaust

Approx: 4 6 Kw. load / enclosure

Recirculation from exhaust back to theintake causing the CRAC units to be

less efficient as they have to cool all ofthe white space first.


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Standard Cold Aisle / Ducted Exhaust

Front Vented Door / Solid Rear Door

(Optional fan assisted)

63 - 68 F in Cold Aisle



Approx: 5 -7 Kw. load / enclosure

The return air temp is increased whichincreases the CRAC unit efficiency. The whitespace of the room does not get heated from theHot aisle recirculation. Therefore the CRACunit can run at a lower setting (cost savings)and still achieve the same Cold Aisle temps.



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Plenum Air manager / Ducted Exhaust

Front Vented Door / Solid Rear Door

(Optional fan assisted)

68 - 72 F in white space



Approx: 8-12 Kw. load / enclosureThe return air temp is increased whichincreases the CRAC unit efficiency. The whitespace of the room does not get heated fromthe Hot aisle recirculation. Therefore theCRAC unit can run at a lower setting (costsavings) & achieve

Less perf tiles are required to cool the whitespace only. The intake air is forced through anadjustable Air diverter directly from theCRAC.

Having an adjustable opening allows the raisedfloor pressure to be maintained throughout theData Center.


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kW ratings are dependant upon the Data Center CRAC units in a Passive System

Localized Optional Rack Fans can be installed for a Active System

Heat Load Dissapation of the Enclosure within a Data Center is directly Dependant upon the CoolingCapacity of the CRAC units and Method of the Delivery & Return Airflow.

Cooling Efficiency is related to the separation of the Conditioned Air from the Hot Exhaust by variousmethods based upon the specific Data Center Environment.Also the elimination of Bypass Airflow of the Conditioned air will increase Cooling Efficiency.


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Ducted Intake / Ducted Exhaust

Solid Front Door / Solid Rear Door68 - 72 F in white space

60 F at server intake


Approx: 15 plus Kw. load / enclosure

The return air temp is increased whichincreases the CRAC unit efficiency. The whitespace of the room does not get heated fromthe Hot aisle recirculation. Therefore theCRAC unit can run at a lower setting (costsavings) & achieve

Even less perf tiles are required to cool thewhite space only. The intake air is completely

contained and is able to be adjusted at theCRAC unit level.

This concept can be done on slab floor as well.

Less CapEX for building.


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A Rear Door Heat Exchanger

Aftermarket Accessory

Can be passive or active (with fans)

REMOVES HEAT ONLY!

DOES NOT COOL EQUIPMENT!

This specialty solution only deals with theheat which builds up behind the servers inthe rear of the enclosure.

These doors are made by a number of coolingcompanies and they act as a heat sinkdispersing heat passing from the rear of theenclosure across the heat exchanger.

A quantity of cold water passes through thedoor. The heat in the rear of the enclosure istransferred to the water and the closed loopremoves that heat from the enclosure.


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A Rear Door Heat Exchanger

This concept requires significant cost andinfrastructure improvements, to include asource for chilled water, a coolant distributionunit and all the costs associated with plumbingconnections and installation.


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A Closed Loop Water Cooled

EnclosureManufactured by a number of companies asa specialty enclosure or an aftermarketaccessory designed for installation instandard product.

Offers a complete closed loop solution whereheat is extracted from the rear of the enclosure

via fans and channeled via a plenum to a heartexchanger mounted in the bottom of theenclosure.

Cold water not only serves as a heat sink butas the fans drive the air across the heatexchanger, it becomes cooled and is thenforced up a plenum chamber in the front of theenclosure to deliver conditioned air to the front

of the servers and equipment mounted in theenclosure..

As is the case with the rear door product, thisconcept requires significant cost andinfrastructure improvements, to include asource for chilled water, a coolant distributionunit and all the costs associated with plumbing

connections and installation.


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Cooling ConsiderationsA Closed Loop Water Cooled Enclosure


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Cooling ConsiderationsA Closed Loop Water Cooled Enclosure


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Containment

Many times cooling challengescan not be met by simplyexpanding infrastructure oradding additional CRAC units.

The strategy behindcontainment is to eithercapture as much conditionedair as possible or to Isolate &

exhaust as much hot air aspossible within the data centerspace.

In this concept, the goal is tocreate a contained pool ofconditioned air in the cold aisle.

The air will fall to the lowest

point in this contained space,focusing it where it is mostneeded; in front of the mountedequipment.


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Cooling ConsiderationsContainment

In addition to end of aisle doors, there arealso a number of products which offer

containment across aisles, panels whichmount to the top of the enclosures andcontainment curtains which hang from theceiling.

It is important to be familiar with theparticular building and fire code standardsbefore completely closing off a grouping of

enclosures, either for hot or cold aislecontainment


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Future-Proofing

From a traditional low densitydeployment in a traditional hotaisle/cold aisle to the use of airmanagement accessories andchimneys to maximize ambient

conditions, to a closed loopwater cooled system, thisapproach will allow your datacenter to grow, as neededwithout removing anyequipment (or enclosures) from

service during data centerupgrades.


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Future-Proofing

The right platform, able toaccept a variety ofaccessories in bothpassive and activeconfigurations, canoutlive the data centeritself allowing you tofuture-proof youroperations.


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ProtectPrimary Use Severs or Patching, or both determines size.

Deeper & wider enclosures accommodate larger servers (84H X 30W X 48D.)

RMU Vertical space requirements.Platform considerations Ease of Use; rail adjustability, Door & side panelaccess/removal.

Power

Enclosure Density as it relates to demand, available power and ready access

Estimated Power usage; PDU mounting requirements, size.Grounding Locations.

CableAllow for a growing variety of Cable Management options/techniques.

CoolDevelop Airflow paths internal & external.

Achieve Hot & Cold Air separation within the enclosure.Utilize Aisle Containment Options to maximize ambient conditions.Allow for unique applications like Side-to-Side Air Flow equipment.

bill santucci

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