ASHRAE Journal - March 2013 - 76

DATA CENTERS
culture and style of the committee were engineered to be hardworking and fast. To meet the speed to market issue, it was
discovered that the optimal way to deliver the information would
be via special publication books, each with a limited scope (i.e.,
a series of books rather than one book, in order to produce and
publish them faster). TC 9.9 also created its mission statement:
“To be recognized by all areas of the datacom industry as the
unbiased engineering leader in HVAC and an effective provider
of technical information for the datacom industry.”

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With this context in hand, it is now easier to answer the question: “Why Datacom?” The title of TC 9.9 was successful in
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the mission critical facilities. Prior to the formation of TC 9.9,
the data center industry and the telecom industry had a long
history of operating somewhat independently of one another.
Since TCP/IP is a networking protocol, it involves the
telecom industry. However, TCP/IP is also the Internet, which
involves computing. By this time, convergence was an emerging theme talked
about in both industries and it was clear
where the trend was headed. As a result,
TC 9.9 took “data” from data centers and
“com” from telecom facilities to form
the word “datacom.”
The TC 9.9 books that have been published are labeled the “Datacom Series.”
The intent was never to replace the professional organizations active in the telecom
industry, such as TIA (Telecommunications Industry Association), BICSI, ATIS,
etc. Instead, there is collaboration with
these organizations and TC 9.9 to ensure
content from them, that is valuable to the
overall datacom industry, is included in
the Datacom Series of books.

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76

ASHRAE Journal

Datacom Challenges & Convergence
One of the interesting developments
is that these two industries (data centers
and telecommunications) came from very
different approaches and philosophies.
For example, in the early days of the
telecommunications industry, there were
many central ofﬁces or wireline facilities.
These low power density facilities didn’t
have a strong need for ﬂexible cooling solutions since things remained unchanged
for decades. A typical central ofﬁce was
conﬁgured with no raised ﬂoor; overhead
cooling; 48 V dc power; and a heavy
emphasis on no liquid piping.
Conversely, the data center industry
emerged later when power densities
of electronics were increasing rapidly.
As a result data centers have often
been conﬁgured with raised ﬂooring;
underﬂoor cooling; 208 V ac power;
liquid or air cooling (e.g., mainframes);
and operator grounding procedures are
limited, if at all.
The philosophies and approaches of
the data center industry and the telecommunications industry were signiﬁcantly
March 2013
ASHRAE Journal - March 2013

Table of Contents for the Digital Edition of ASHRAE Journal - March 2013
