Most systems and particularly those that employ an enclosure will use some form of forced air cooling.
Forced air cooling fan.
Invariably the cooling will involve a fan of some kind.
Instead it s very common to use one or more fans to force the air at a known volume and velocity through the enclosure or chassis to obtain the needed thermal relief for hot ics resistors motors and other components.
Fans may be wired to start automatically when the temperature reaches a pre set value.
These transformers generally have a dual load rating one for aa self cooling natural air flow and a larger load rating for fa forced air flow.
For example forced air cooling of electronic components in an industrial setting is significantly more efficient than convection cooling as it reduces air temperature in the general vicinity of the components being cooled and improves the heat transfer coefficient.
The choice of fan particularly for an enclosed pcb can have a significant impact on the overall lifespan of a system.
This pressure difference forces the cool air through the packages and past the produce where it picks up heat greatly increasing the rate of heat transfer.
Changes in air flow direction constriction of the air channel and use of auxiliary devices such as finger guards filters and louvers increases the pressure drop in an air stream.
These transformers have a fan or fans providing additional forced air cooling.
Forced air cooling is advantageous in a number of different scenarios.
A central air conditioning system uses the forced air system within your home to deliver cooled air making use of the vents plenums and ducts to provide conditioned air.
Forced air cooling of electronic components results in a dramatic improvement over natural convection cooling.
Forced air cooling is an efficient way of implementing effective thermal management for an enclosed pcb and choosing the correct fan for the application is vital.
The primary difference between forced air and central air systems then is that central air conditioning specifically refers to a cooling system.
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This effectiveness is the result of the following.
Reduction in the temperature of the air in the vicinity of the components being cooled.
Forced air cooling is accomplished by exposing packages of produce in a cooling room to higher air pressure on one side than on the other.
