| sss |
what is the most efficiant way to use a fan?....
if its a case:
the fan blows air from inside to outside
or
the fan blows air from outside into the case
if its a heatsink:
fan blows air on the heatsink
or
fan blows air out of the heatsink ....
thanx...;) |
|
|
| ifrythings |
In most PC power supplies they have it air comes in back of the supply, across the heat sinks, then out the fan into the air.
Denon amplifiers use a fan inside the unit to blow cool air onto the heat sink then out the back of the unit.
I would say that I would use the fan blowing onto the heat sink then out the back of the unit mostly cause PC processors use it that way and those buggers can hit 100C in a minute or two:bigeyes: :eek: .
Just my two points. |
|
|
| AndrewT |
Hi,
try to avoid having a fan sucking through a resistance.
Your last option sounding like sucking even though you said blowing.
All your other options are feasible.
Your decision should be based on reducing the most critical temperatures (not necessarily the highest temperatures). |
|
|
| sreten |
Hi,
a fan sucking will operate at a higher temperature than a fan
blowing due to the temperature of the air flowing through it.
Blowing is therefore more reliable.
:)/sreten. |
|
|
| jacco vermeulen |
Fans that are sucking instead of blowing have lower efficiency.
Has to do with reduction of lift due to changes in the pressure envelope on the fan blades.
Many ships nowadays have ducts behind the screws to increase efficiency, NOT in front of the screws. QE2 was one of the first to be installed with ducted Lips screws. Tug boats have them too.
The ducts streamline the flow, and efficiency is also raised because the screws are pushing.
A fan that is blowing receives less dust and heat, which is good for increased life span. Dust particles always have a way of getting into bearings, dry up the grease, and kill the fan. |
|
|
| sss |
i'm a little confused :rolleyes:
when u look at a CPU heatsink, u can see that the fan is blowing air on the heatsink ...
but , if u'll look at the atx power supply fan , the fan is sucking air from the atx case ,and not blowing air on the heatsinks...
why is that?
so , i thought ,maybe when its a "case" it is better to suck the hot air out of it , instead of blowing cool air into it...:confused: |
|
|
| megajocke |
| I think the reason the fan is sucking air out of the PC is that it would fight the natural convection inside the case that causes the warm air to rise if it were blowing. |
|
|
| lndm |
| I find most CPU heatsink fans suck rather than blow. This causes a build up of dust on the heatsink that eventually blocks the airflow. |
|
|
| AndrewT |
Hi,
I have only looked at 5 CPU fanned heatsinks and all of them blow. |
|
|
|
