ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 38

Port for
oil-circulation
system

Mono-block
bearings for
hightemperature
applications

FIGURE 14. Mono-block bearing suitable for oilcirculation system.

High-Temperature Ambient Conditions,
Continuous Operation

FIGURE 15. Reversible tunnel-ventilation fan.

As mentioned earlier, the temperature of the air surrounding
motors, bearings, belts (drive arrangements 1, 3, 9, and 10),

temperature for which the motor was rated. If it does,

and all other outside-the-air-stream accessories requires

the motor's temperature can be lowered through the use

precautions.

of a water jacket or an external cooling system. Ensure

Motors. The temperature of the air surrounding a
totally enclosed, fan-cooled motor should not exceed the

the motor's bearings and lubrication are designed for the
temperature requirement.
Bearings. In many high-temperature applications, an
oil-circulation system is used to ensure bearing temperatures are maintained (Figure 14).

Applications of High-Temperature Fans
Depending on a fan's intended use, the amount of time the
fan can be expected to be exposed to high-temperature air
can vary. Thus, a fan can be rated for a short, deﬁned duration or it can be rated for continuous operation.
Take, for example, main ventilation fans and jet fans
used in a roadway or transit tunnel (Figure 15). Because
their purpose is to evacuate air in the event of a ﬁ re, these
fans are rated for a short duration, normally 1 or 2 hr. Most
other fans, such as those for petrochemical processing
(Figure 16) and those for forced circulation or recirculation of air or gas in furnaces, ovens, kilns, and dryers, are
rated for continuous operation.

Conclusion
Most high-temperature applications have unique requirements that can make fan speciﬁcation complicated. The
key is identifying the system information the fan manufacturer needs to design and supply a product optimized
for the application.

38

2020 A M CA i n m o t i o n

w w w. a m c a .o r g

http://marsair.com http://www.amca.org

ASHRAE Journal Supplement - AMCA InMotion - October 2020

Table of Contents for the Digital Edition of ASHRAE Journal Supplement - AMCA InMotion - October 2020

Contents
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - BB1
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - BB2
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - Cover1
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - Cover2
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - Contents
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 2
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 3
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 4
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 5
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 6
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 7
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 8
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 9
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 10
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 11
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 12
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 13
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 14
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 15
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 16
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 17
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 18
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 19
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 20
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 21
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 22
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 23
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 24
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 25
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 26
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 27
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 28
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 29
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 30
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 31
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 32
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 33
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 34
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 35
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 36
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 37
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 38
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 39
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 40
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 41
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 42
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 43
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - 44
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - Cover3
ASHRAE Journal Supplement - AMCA InMotion - October 2020 - Cover4
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