Whitepaper & Design Guides

Whitepaper & Design Guides


White Paper - IEEE 519-2014 Understanding & Mitigating Harmonic Distortion in Data Centers

The modern data center utilizes many non-linear electrical loads due to the use of EC Motors and VFD's on the fans and pumps that maintain environmental conditions within the white space. These variable speed pumps and fans allow us to tightly control the data processing environment while providing a more energy efficient system.

One of the potential downsides of these variable speed systems is the harmonic distortion of the power signal. This distortion is caused by the sinusoidal power signal passing through a non-ideal, non-linear device such as a VFD or ECM; additional content is added to the input signal at multiples (harmonics) of the original frequency. Total Harmonic Distortion (THD) is the measure of that additional signal content that was not present in the input signal.

This unwanted distortion can increase the current draw in power systems which results in higher temperatures in conductors and transformers. Higher frequency harmonics can result in additional core loss in motors which results in excessive heating of the motor core which can lead to motor failure.

Download the white paper, written by Tony Hoevenaars, President and CEO of Mirus International about understanding the requirements and intent of standard IEEE 519-2014 and the best practices for mitigrating harmonic distortion in a data center's electrical distribution system. Tony will also discuss writing specifications for insuring acceptable levels of harmonic distortion.

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White Paper - Regulations Determining Computer Room Cooling Selection

Many engineers and contractors are facing increasing concern about comfort (residential) cooling units being misapplied to computer room applications. Prior to 2010 there was no required energy efficiency standard for computer room cooling equipment in the United States. Today, federal regulations require computer room cooling equipment to meet a minimum Sensible Coefficient of Performance (SCOP) while similar municipal and state conservation codes are continuously evolving.

With this in mind, STULZ has created a white paper intended to assist engineers and contractors who are designing data centers and small IT spaces by providing a history of the various requirements for computer room cooling, along with a detailed overview of the most recent federal regulations.

Download the full white paper to learn:

  • Description and history of comfort and precision cooling
  • New regulations and their affect on air conditioning selection
  • A selection example

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White Paper - Precision Environmental Controls for the Medical Cannabis Industry

Since many engineering firms are being asked to design a grow facility for the first time, it is my hope that this white paper will provide a good basis for understanding the unique challenges of the cannabis industry and how they can be addressed with the right equipment.

Download the full white paper to learn:

  • Detailed description of the grow process with environmental requirements
  • Methods of moisture control
  • Control of micro pests (thrips and spider mites)
  • How Computer Room Air Conditioners (CRACs) are suited to grow room applications

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  • STULZ Water Treatment Application Guide

    STULZ Water Treatment Application Guide

    • File: STULZ_Water_Treatment_Application_Guide.pdf

    • Type: Adobe PDF

    • Size: 2,72 MB

    • Language: English (US)

    • Date: 2020-06-02

  • STULZ Water-Side Economizer Design Guide

    • File: STULZ_Water-Side_Economizer_Design_Guide.pdf

    • Type: Adobe PDF

    • Size: 3,45 MB

    • Language: English (US)

    • Date: 2016-02-15

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