CRACs | Mission Critical Magazine

Thermal Management

Refrigerant Soup: CFCs, HFCs, HCFCs, etc.

A promising future for CO2

June 6, 2022

With data centers on par with the aviation industry for their contribution to the world’s CO₂ emissions, alternative refrigerants in data center cooling systems have the potential to reduce emissions equivalent to 43.5–50.5 gigatons of carbon dioxide from 2020 to 2050.

Thermal Management

How To Choose Between CRAHs and CRACs

Design, maintenance, and sustainability considerations

Dennis Cronin

May 17, 2021

Traditional computer room air handler (CRAH) and computer room air conditioner (CRAC) designs differ in more than one way.

Cooling Solutions — Trane

January 14, 2021

There are principally two types of data center cooling solutions: computer room air conditioners (CRACs) and computer room air handlers (CRAHs). Which technology is the best choice for each installation depends on various factors, including climate and data center size and configuration.

Clune Completes Construction of DataGryd’s New Facility

MegaSuite 6 data center in the heart of New York City

December 14, 2019

Construction was completed on DataGryd’s MegaSuite 6 facility. Corgan, a data center architecture firm, designed the building; Robert Derector Associates served as the project’s engineer; and Clune Construction built it.

Factors That are Changing Your Data Center Rack Requirements

August 6, 2019

With the rise of colocation, enterprise and edge data centers, the requirements for data center racks have changed from being a cabinet that manages equipment to a rack enclosure that can reduce data center operational costs by preserving valuable floor space, optimizing cooling and increasing the efficiency of IT staff.

Commentary by Carrie: Cooling a high density data center?

Carrie Higbie

August 3, 2012

It never ceases to amaze me how many vendors tout a “one size fits all” solution.

End-Users Come First

Good business philosophy is good for business

Harold Simmons Sam Macrane

August 29, 2011

Is putting end-users first a business philosophy or a design philosophy, or both? Saying that end-users come first is easy, but system designers and equipment suppliers find that putting end-users first can be hard to do.

Raised Access Floors Meet Changing Data Center Airflow Requirements

Emerging technologies address high-density, diverse and variable heat loads

Daniel Kennedy

August 1, 2011

IT technology has increased in density over the past decade to the point where individual racks can now require more than 30,000 watts of energy. In 2007, an article by John Niemann, product line manager at APC-MGE, reported that new server technologies were driving power densities in excess of 30 kilowatts per cabinet.

Maintaining Cooling in a Hot Crisis

Power is not the only essential service

Paul Bemis Liz Marshall

August 1, 2011

A 2006 AFCOM membership survey revealed that one out of every four data centers will experience a business disruption serious enough to affect the company’s ability to continue business-as-usual.