数据中心 – 服务器机房的理想湿度?

大多数设备的额定湿度范围很广(例如,5到95%不凝结).

但是,什么是理想的湿度?较高的湿度会使设备的热量稍微好一些,但也可能具有更强的腐蚀性.

我总是听到40%的声音,尽管我无法支持.我会说,你需要一些湿度来减少静电积聚.

编辑:

啊,我找到了我的文档,旧的Sun Microsystems Part No. 805-5863-13,“Sun Microsystems数据中心场地规划指南:数据中心的最佳实践”

Temperature and relative humidity
conditions should be maintained at
levels that allow for the greatest
operational buffer in case of
environmental support equipment
down-time. The goal levels for the
computer room should be determined in
a manner that will achieve the
greatest operational buffer and the
least possibility of negative
influence. The specific hardware
design, room configuration,
environmental support equipment design
and other influencing factors should
be taken into consideration when
determining the specific relative
humidity control appropriate for a
particular room. Psychrometrics can
affect hardware through thermal
influences, Electrostatic Discharge
(ESD), and increases in environmental
corrosivity.

和:

Under most circumstances, air
conditioners should be set at 72º F
(22º C) with a sensitivity range of
+/- 2º F (+/-1º C). Humidifiers, in most cases, should be set at 48% RH
with a sensitivity range of +/- 3% RH.
The set-points of the air conditioners
should always be chosen in an effort
to maintain the optimal recommended
temperature and relative humidity
levels for the room environment. These
set points should maintain appropriate
conditions, while allowing wide enough
sensitivity ranges to help avoid
frequent cycling of the units. While
these tight ranges would be difficult
to maintain in a loosely controlled
office environment, they should be
easily attained in a controlled data
center.

Numerous factors, such as heat-load
and vapor barrier integrity, will
influence the actual set-points. If
the room lacks adequate vapor barrier
protection, for instance, it may be
necessary to adjust humidifier set
points to accommodate seasonal
influences. Ideally, all inappropriate
influences on the data center
environment will be eliminated, but in
the event that they are not, minor
adjustments, made by trained
personnel, can help alleviate their
effects on the environment.

和静电放电:

The maintenance of appropriate relative humidity levels is probably the most
universal and easiest means of addressing ESD concerns. Appropriate moisture
levels will help ease the dissipation of charges, lessening the likelihood of
catastrophic failures. The following chart illustrates the effect moisture levels can
have on electrostatic charge generation.
Note – Source Simco, A Basic Guide to an ESD Control Program for Electronics
Manufacturers

TABLE 6-3 Electrostatic Voltage At Workstations
                            Static Voltage 
Means Of Static Generation  Relative Humidity 10-20% Relative Humidity 65-90%
Walking Across Carpet       35,000                   1,500
Walking over vinyl floor    12,000                   250
Worker at bench             6,000                    100
Vinyl envelopes for work instructions 
                            7,000                    600
Common polly bag picked up from bench
                            20,000                   1,200
Work chair padded with urethane foam 
                            18,000                   1,500
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