Case Study: Reducing the Ecological Footprint of Data Center Cooling

APPLICATION

Use of Fan Arrays for Supply Air and Exhaust Air in Data Center Cooling

CHALLENGE

  • Reduce Ecological Footprint of Data Center
  • Increase Static Efficiency in Operating Point
  • Lower Operational Cost of Data Center

SOLUTION

  • Fan Wheel optimized for operational area of Data Center Cooling
  • Aluminum Fan Wheel
  • Airfoil Blade Geometry

RESULTS

  • 10% higher efficiency
  • 1.4 dB[A] quieter
  • 12% less operational costs per year
  • lower fire load of fan wheel
  • 100% recyclable fan wheel

PROJECT OVERVIEW

Cooling data centers generates enormously high energy costs. Around 30% of the energy consumption of a data center, which is not generated by the actual IT, is accounted for by the fans used for cooling. The correct selection of the fans used can therefore make a significant contribution to reducing the operating costs of a data center. However, most of the fans do not achieve their maximum efficiency in the aerodynamic operating area of data center cooling.

punker has developed a fan wheel that achieves significantly higher efficiency in the actual aerodynamic application area of data center cooling than competitor products. It can therefore contribute to a significant reduction in operating costs. Compared to plastic impellers, punker’s aluminum impeller is also 100% recyclable and has a lower fire load.

APPLICATION

In the case considered here, a data center is to be supplied with a constant 70° F supply air temperature by means of a fan array in order to ensure optimum functionality. The fans arranged in a fan array are to dissipate a large amount of heat without additional cooling, i.e. a high volume flow rate has to be realized with low pressure. The operating points are therefore typically on the right-hand side of the fan curve.

CHALLENGE

Increasing packing densities and higher performance capabilities of data centers generate enormous amounts of waste heat, with even greater heat quantities to be expected in the future due to the ongoing further development of this trend. In order to ensure the optimum functionality of data centers, they must be cooled with efficient concepts in order to keep the extremely high energy consumption and thus the operating costs as low as possible.
The fans used play an enormously important role here: around 30% of the energy consumption of a data center, which is not generated by the actual IT, is accounted for by the fans used for cooling. The correct design of the fans used can make a significant contribution to reducing the operating costs of a data center.

However, most of the fans used for supply and exhaust air in data centers do not achieve their maximum efficiency in the aerodynamic operating area of data center cooling. Most standard HVAC fans reach their maximum efficiency towards the left of the fan curve. The fans arranged in a fan array, however, are to dissipate a large amount of heat without additional cooling, i.e. a high volume flow rate has to be realized with low pressure. The operating points are therefore typically on the right-hand side of the fan curve.

punker aimed to develop a fan wheel specifically for data center cooling applications, in particular by means of fan arrays, which could make a significant contribution to reducing operating costs and the data center’s environmental footprint.

SOLUTION

punker developed a fan wheel specifically for supply and exhaust air in data centers, where very high volume flows of up to 30,000 cfm are required at low pressure. The new data center impeller achieves significantly higher efficiency than competitor products in this area of application. The following case study shows how the operating costs of a data center can be reduced by around $US 7,000 per year with the new Data Center fan wheel by punker. Another positive side effect is a possible reduction in noise emission of 1.4 dB[A].

Assumption:

Data Center shall be supplied with constant 70 °F tempered supply air using a fan array to ensure optimum functionality.
Operating Point: 0.8 inWG | 9,420 ft³/m

Electricity rate: 0.15 USD/kWh

Power consumption in operating point:

New punker Data Center Wheel: 1,585 W = 2.12 hp | rpm = 791 1/min

punker Dprime AWA: 1,707 W = 2.29 hp | rpm = 909 1/min

Competitor: 1,936 W = 2.56 hp | rpm =  886 1/min

Product: punker Data Center Wheel punker Dprime AWA Competitor
Speed 791 rpm 909 rpm 886 rpm
Power consumption in
operating point:
1,585 W | 2.12 hp 1,707 W | 2.29 hp 1,936 W | 2.56 hp
Operating cost p.a.  $US 31,240  $US 33,645  $US 38,158
Sound power level  82.2 dB(A) 83.6 dB(A) no data

The new Data Center Cooling Fan Wheel

  • blower wheel for use in data center cooling / computer room cooling
  • suitable for Fan Arrays, Plug Fans
  • very high efficiency in actual operating area
  • airfoil blades for optimum sound

Visit the product page…

Your project with punker

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Do you already have a detailed overview of your new product and can you provide information on air performance, drive and design specifications? Then simply send us this information with the technical questionnaire below and our team will immediately define suitable solutions for you from the broad punker portfolio.

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Technischer Fragebogen

    Company*:

    Name*:

    Country*:

    Your eMail address*:

    Phone:

    Fax:

    Date:


    Attention: Frequently all operating details are either not known or only inaccurately known. You must therefore as a manufacturer make sure by suitable tests that the correct fan wheel has been selected. When the following questions are answered as comprehensive as possible, we can submit a proposal as quickly and as defi nite as possible. Please give us further details on a supplementary sheet. This questionnaire on no account replaces a technical specifi cation (TSP).


    1. General Information

    1.1. Fan application (type of unit and appliance, rail application, compressor, etc.)

    1.2. Are there any special requirements on safety conditions? (e.g. explosion protection, danger of accident at wheel failure, etc.)

    YesNo

    Please state special requirements:

    1.3. Medium to be handled and its state (e.g. smoke gas with t max = 300° C, dust laden air or similar)??

    2. Air Duty

    2.1. Volume flow
    V' = m³/hcfm

    2.2. Static pressure increase
    Δpfa = PainWG

    2.3. single flow/double flow?
          einflutigdoppelflutig

    2.4. Density of the medium
    rho = kg/m³lb/ft³

    2.5. Max. media temperature
    t = °C°F

    2.6. Max. A-rated sound power level
    Lw = dB(A)

    2.7. Other technical details (e.g. max. flow speed, special curve steepness, etc.)?

    3. Drive

    3.1 Is the speed variable?

    YesNo

    minimum ; maximum rpm
    fixed speed rpm

    3.2. Direct motor drive

    n = rpm

    3.3. Is a maximum motor power specified?

    YesNo

    maximum motor power Pw = kWhp

    3.4 Operating mode?

    S1 - IEC 60034-1other operating mode

    other operating mode =


    4. Dimensions and Constructional Execution of the Fan Wheel

    4.1. Can a standard fan housing be used?

    YesNo

    max. dimensions of spiral housing:

    4.2. Are certain main wheel dimensions defined?

    main wheel dimensions:

    4.3. Hub bore
    Ø d = mm, fit
    with/without keyway?

    withwithout

    4.4. Hub model and arrangement (e.g. inside the wheel, outside, etc.)

    4.5. Material of wheel body

    steelaluminumother:

    other material:

    4.6. Additional surface protection

    galvanizedpower-coatedother:

    other surface protection:

    4.7. Additional specifications

    5. Demand, Pricing

    5.1 You would like to request an offer for:

    Sample wheels: pcs.

    (later) batch: pcs/year

    Lot size pcs/order

    5.2 planned start of production TT/MM/JJJJ