ASHRAE Journal - July 2019 - 26
TECHNICAL FEATURE
the system designer, and the IT equipment manufacturer must all participate in a well-coordinated effort
to ensure the long-term reliability of the IT watercooling system.
Just to highlight this interaction, the wetted materials for the FWS only allows certain brass alloys and only
specific versions of copper alloys when deploying a
water-cooled server system. These requirements stem
from years of use and would probably not be known
without close contact with the IT manufacturer of such
equipment.
As new water-cooling IT equipment is introduced into
the data center environment, it is critical that the exact
wetted materials for the entire system is well understood. There are several examples in other industries
where a mismatch in materials used led to issues. The
emergence of water cooled ITE is no different in that
respect. The ITE manufacturers as well as the data center facilitators must be aligned on the working fluid
being used, the material set and the water chemistry
plan.
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26
ASHRAE JOURNAL
ashrae.org
J U LY 2 0 19
Summary
Water-cooled IT equipment represents a new paradigm for datacom center operators. As with any new
approach to doing things, education will play a large
role in the successful implementation of water cooling. Although most of the general rules for current
air-cooled implementations apply, datacom center
operators should have cooling contingency plans;
implement cooling system redundancy; deploy critical subsystems, such as pumps that have high reliability and availability; and one should place subsystems such as pumps (water, refrigerant, dielectric)
and rack-based cooling systems on uninterruptible
power supply (UPS). There are, however, some areas
of water cooling that require special attention: temperature control, prevention of condensation, TCS
water cleanliness, wetted material requirements and
water chemistry.
Editor's Note: For more information on this topic, see the Data
Centers column on Page 56.
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ASHRAE Journal - July 2019
Table of Contents for the Digital Edition of ASHRAE Journal - July 2019
Contents
ASHRAE Journal - July 2019 - Intro
ASHRAE Journal - July 2019 - Cover1
ASHRAE Journal - July 2019 - Cover2
ASHRAE Journal - July 2019 - 1
ASHRAE Journal - July 2019 - Contents
ASHRAE Journal - July 2019 - 3
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