PowerPoint Presentation

Data Center SolutionsHumidification & Evaporative Cooling:Scalable solutions to improve PUE and operational reliability1Walter Meier AG, SwitzerlandWorldwide OperationsHead Office: Schwerzenbach SwitzerlandEmployees: 2200Net Sales: 750 Million CHFManufacturing & Climate TechnologiesListed on Swiss ExchangeMajority owned by founding family

Walter Meier Corporate

2

Group Division HumidificationManufacturing

Manufacturing Plants

8 Humidification Production Sites3Diverse and Scalable Technology Offerings

Electric- Electrode Steam - Resistive SteamGas-Fired- Atmospheric SteamPressure Steam- Direct Injection- Steam ExchangeAdiabatic Nozzles Evaporative

Nortec provides a complete and scalable range of solutions for Humidification and Evaporative CoolingWith over 40 years of experience 4

Modular, container, and cloud providers

Data Centers Large or Small5There is also a new whitepaper, titled Saving Energy with Evaporative Media. This is a great sales tool that explains the basics of evaporative media, talks about some great applications and best practices. It is also a great way to sell the benefits of the MH and our unique polyester media. Be sure to distribute it too your engineers, it is an excellent tool to uncover new sales leads.

Customer CredibilityAdd or coment on number of units, years of operation6

Core Application Area: Data CentersHumidification Evaporative Cooling7Human Health- hygiene, comfort, productivityCounter ESD- ensure reliability of ICTDust suppression- extended mechanical component lifeEnsure Warranty protection, operate equipment within manufacturers accepted humidity levels, reduce commercial liabilityMeet applicable standards- ASHRAEMaintain consistent control- humidification is one portion of the overall HVAC system- consistency allows for predictive maintenance, performance evaluation, improved availability

Why Humidify in Data Centers

8Utilize basic laws of physics to achieve cooling with an associated reduction in energy and energy costsProvide a greener solution to humidification requirementsReduced energy consumption contributes to reduced PUE

Why Evaporative Cooling

9

Liquid WaterWater Vapor(Humidity)~1150 BTU/lb0.33 kW

970 BTU/lb for water phase change (liquid at 212F to gas) Isothermal (steam) humidifiers use electricity or gas Adiabatic (evaporative) humidifiers draw energy from airWhen using Atomization/Evaporation the same amount of energy is drawn from the ambient air The air is cooled with 100% renewable energy!21.5970180144NEEDED ENERGY(BTU per lb water)Heat from 5 to up to 32FMelt to 32FHeat from 0 up to 212FBoil to above 212F

Required EnergyBefore we get into any details about products and applications we need to understand the two types of humidifiers; adiabatic and isothermal. Remember the heat of vaporization from college thermodynamics? To convert a pound of water into humidity we need about 1150 BTU to cause a phase change between liquid and vapor form. Water vapor is what is absorbed into the air as humidity.

Isothermal humidifiers use electricity, natural gas, or steam to provide this energy. With adiabatic humidifiers we actually evaporating water without adding heat energy. So where does the 1075 BTU/lb come from? Well, in fact the energy comes from the air! This causes a cooling effect known as adiabatic cooling and provides sensible cooling to the airstream. The humidifiers that we are going to discuss today are an adiabatic type humidifier.

10Adiabatic and the Psychrometric Chart

Lets see this on a psychometric chart. Here we have 75F air at roughly 10% relative humidity. As we humidify we are adding water and drawing energy from the airstream. On the chart this process follows a line of constant wet bulb temperature, and you can see that we are sensibly cooling the air as we increase the humidity levels. In this case we end up with 55F and 70% RH after the humidifier.

1112March 2013Adiabatic Cooling Solutions for Data Center ApplicationsEvaporation of 1 liter of water = Cooling effect of app 2256 kJ or 0,68 kW

Typical energy use for evaporating 1 liter of water = 6-8 W (incl. RO)And gives a cooling effect of 0,68 kW!Adiabatic Cooling12

13Formula:

T = BTU CFM x 1.10 (Constant)

T = 200 x 1000 BTU 20,000 CFM x 1.10 T = 9.1FExample: System CFM = 20,000 cfmHumidity load = 200 lbs/hr*Heat is removed at a rate of roughly 1000 BTUs/lb of water evaporatedCooling and humidity go hand in hand!Adiabatic CoolingExampleSo how much cooling can we get from adiabatic systems? Lets take a look at an example. He we have a 20000 CFM system that has a humidification load of about 200 lbs/hr. Using the formula presented here, we calculate the total BTU that will be extracted by the humidifier, and then divide by the system CFM multiplied by a constant.

In this case we are achieving almost 10F of cooling.

14

ASHRAE Data Center Classifications15New ASHRAE recommended and allowable temp. and humidity ranges for data centers (2011)

Data Center Climate System ASHRAE Standard16

The Green Grid - Updated Air-Side Free Cooling Maps: The Impact of ASHRAE 2011 Allowable RangesAir-Side Free CoolingNOTE: CANNOT BE USED WITHOUT PERMISSION FROM GREED GRID17

The Green Grid - Updated Air-Side Free Cooling Maps: The Impact of ASHRAE 2011 Allowable RangesASHRAE Data Center Classifications18Wider ranges means many areas in NA can meet design conditions by mixing outside air with return air, along with supplemental humidification.

NOTE: CANNOT BE USED WITHOUT PERMISSION FROM GREED GRID

Evaporative Media SystemDX CoilsIndirect Evaporative Cooling19

Indirect Evaporative Cooling20

Adiabatic Cooling Solutions for Data Center Applications21

Case in PointRetrofit of an existing data centre with Evaporative Cooling - NJ, Finance22Background:Replacement of 3 Resistive Steam Humidifiers in rooftop AHUReplacement due to poor performance and Operational cost: part of an energy audit Primary humidification and Outside air requirements which servers the entire white space (raised floor area)This location has 55 CRAC units- every other unit has 22lb per hour electrode steam humidifiers which have been shut down to conserve energyCurrent consumption is 5kW for 11lb and 9 kW for 22lbTheoretical humidification load of 26 units with Humidifiers 234kW: Duty cycle is based in the sensible load and outside air percentageTheoretical humidification load of 395kW (what would the typical duty cycle be?) RetrofitMH units retrofitted into existing sections of AHUReflow with softened water (filtered and softened)HistoryUnits installed in 2011Operation is continuous with 24X7 fan operation at 50% capacity or 12 hour a dayAll CRAC units are now supplementary (provide redundancy) Energy savings for humidification is NJ energy costs ($.10 cents /kWh) X duty cycle 4380 X unit rating/consumption Good question I do not know the fan HPSecondary impact- cooling benefits of 10 to 15 f temperature dropNeed to identify load shed for chillers load off chiller would be based on the CFM X DT X 1.08 I assume the inlet temp to the make-up air unit would be 75 to 85 DegreesCompare electrical costs Impact on new installationsReduced breaker size, reduced wiring and electrical services, reduced cost, space and secondary heating impactReduced hardware cost- CRACPotential to increase Evaporative Cooling capacity to further offload chillers (physical plant loads) 23

System DescriptionReplacement of 9 x Resistive element humidifiersShut down 26 x 22 lbs/hr humidifiers installed in CRAC units.Installation of 3xMHTC Reflow Units 320 lbs/hr (960 lbs/hr total)

24Estimated Energy Savings234 kW reduction through shutdown of 26 CRAC humidifiers24/7/365 with a 50 % duty cycle = $102,492 annual savings*297 kW = 1,013,406 btu = 84 Tons free cooling from evaporative media units24/7/365 with a 50 % duty cycle = $27,699 annual chiller savings**2.13kW to power all evaporative media units

Additional Savings and BenefitsReduced equipment cost CRAC unitsPotential to increase Evaporative Cooling capacity to further offload chillers (physical plant loads)

* Based on $0.10/kWh** Based on 0.75 kW/Ton , $0.10/kWhDoes not take into account cost of water (supply/waste) 25

ASHRAE Data Center Classifications26New ASHRAE recommended and allowable temp. and humidity ranges for data centers (2011)

Case in PointRetrofit of an exisiting data center w/evaporative cooling.North Carolina - Telecom27Background:Project to increase Humidification capacity by installing 6 new Air Handlers (York), 2009Primary humidification and Outside air requirements which serve the entire white space (raised floor area)This location has 50 CRAC units- 30lb per hour electrode steam humidifiers which have been shut down to conserve energyCurrent consumption is 11.2 kW for 30lbTheoretical humidification load of 50 units with Humidifiers at 34.5% duty cycle is 194W (Duty cycle is based in the sensible load and outside air percentage and reflects average of the past 4 years) Retrofit6 new AHUs with MH units were added to the existing site with reflow, potable water with no treatmentEnergy savings for humidification is NC plant energy costs (5.60 cents /kWh) X duty cycle 3022hr X 11.2kW per unit = Secondary impact- cooling benefits of 10 to 15 f temperature drop Impact on new installationsReduced breaker size, reduced wiring and electrical services, reduced cost, space and secondary heating impactReduced hardware cost- CRACPotential to increase Evaporative Cooling capacity to further offload chillers (physical plant loads)

Significant energy savings have been achieved with the deployment of Evaporative cooling. Significant further energy savings are possible should the units be run outside of the season for cooling 28

Evaporative Media Units29System DescriptionInstallation of 6xMHTC Reflow Units 272 lbs/hr (1632 lbs/hr total)Shutdown 50 x 30 lbs/hr humidifiers installed in CRAC units

30Estimated Energy Savings560 kW reduction through shutdown of 50 CRAC humifiers24/7/365 with a 35 % duty cycle = $103,017 annual savings*504 kW = 1,721,630 btu = 144 Tons free cooling from evaporative media units24/7/365 with a 35 % duty cycle = $19,868 annual chiller savings**4.26kW to power all evaporative media units

Additional Savings and BenefitsReduced equipment cost CRAC unitsPotential to increase Evaporative Cooling capacity to further offload chillers (physical plant loads)

* Based on $0.60/kWh** Based on 0.75 kW/Ton , $0.06/kWhDoes not take into account cost of water (supply/waste) 31

New large scale data center with 100% free coolingCase in Point32

Case in Point

Lulea Phase 133

Case in PointPrinciple Diagram34System DescriptionTotal construction area28,000 m2 (300,000 sq.ft. ) Free Cooling system, no "traditional" refrigeration units26 High-pressure humidification systems with a capacity of: 13675 L/h (~3000g/h)Max Cooling effect 9300 kWMax Power consumption 60kW546 m2 (~6000sq. Ft.) misteliminator surface5500 nozzles @ 2450 m (~8,000 ft.) pipes

Case in Point35

Case in PointLulea- HP Spray Nozzles36

Case in PointLulea- plenum and fan wall37

Case in PointWhite Space (Prineville)

38

Case in PointWhite Space (Prineville)

39SAVE MoneyFree CoolingBest Practice

Data Center Case in Point40There is also a new whitepaper, titled Saving Energy with Evaporative Media. This is a great sales tool that explains the basics of evaporative media, talks about some great applications and best practices. It is also a great way to sell the benefits of the MH and our unique polyester media. Be sure to distribute it too your engineers, it is an excellent tool to uncover new sales leads.

Basics of TechnologyBest practicesApplication knowhowWhite Papers

41There is also a new whitepaper, titled Saving Energy with Evaporative Media. This is a great sales tool that explains the basics of evaporative media, talks about some great applications and best practices. It is also a great way to sell the benefits of the MH and our unique polyester media. Be sure to distribute it too your engineers, it is an excellent tool to uncover new sales leads.

Please join us

Entire product line in one spotLive demonstrationsHelp SoftwareKey client logos- not just datacentres- Naomi to update42