An idea for cooling manufacturers

[Mist]

Everyone knows that because of the design of a standard cooling fan, there is a dead spot in the centre where it rotates. Now, on a HSF above a CPU, obviously, the most heat is generated in the dead centre, directly below the dead spot of the fan.

So, because of that design, the airflow doesn't go directly to the main source of heat.

I was thinking last night, (always a dangerous thing for me to do!), but I thought I'd present this here and see what any responses would be.

If a heat spreader was designed starting with a more or less standard 60cm base but then expanding to 80cm at the top where the fan goes, then the user would obviously stick an 80cm fan on it but the actual design of the heat spreader would act like a funnel and force the air more towards the centre where the most heat is immediately generated.

A further idea would be that since most PCs have their PSUs at the top of the case which also incorporates an air extraction process, then would it not be sensible to block of the side of the heat spreader which faces down ways of the motherboard, so that when the HSF is in operation, then the air generated by the cooling fan is forced directly up towards the PSU, instead of going in both directions as happens now?

This would probably also increase the cooling of the PSU since it would receiving cool air more quickly than normal?

Any comment?

Michael.

 

[phokaz]

http://www.thermaltake.com/products/heatsink/ductingMod.htm

Another way to dist. air flow

 

[Fallen Kell]

I remember seeing that some manufaturers are already working on the center fan "dead" spot. I read something about the sleave driven fans (or whatever they are called, the ones with magnets on the edge of the fins which are pushed/pulled by magnetic forces generated by electro magnets placed in the fane frame), which does not have nearly as large a "dead" spot because the fins can basically go all the way to the center of the fan (no motor to take up the space there).

 

[Nerdwannabe]

It's been done already

 

[cheapgoose]

Originally posted by: Fallen Kell
I remember seeing that some manufaturers are already working on the center fan "dead" spot. I read something about the sleave driven fans (or whatever they are called, the ones with magnets on the edge of the fins which are pushed/pulled by magnetic forces generated by electro magnets placed in the fane frame), which does not have nearly as large a "dead" spot because the fins can basically go all the way to the center of the fan (no motor to take up the space there).

sounds like the TMD fans.

 

[phokaz]

Originally posted by: Nerdwannabe
It's been done already

Yes, another product with the same concept in mind. Although he is saying, develop a heatsink that would guide the air flow from a normal 60/80mm fan to the center fins in order to disperse the heat from where it is most concentrated. I wish I had to tools hehe.

 

[Mist]

Re: It's been done already

That's a German site and I can't find a mention of that product on Coolermasters website anywhere.

Michael.

 

[OulOat]

Originally posted by: Mist
Re: It's been done already

That's a German site and I can't find a mention of that product on Coolermasters website anywhere.

Michael.

It's not Coolermaster, it's Vantec.

One thing that is bad about the funnel idea is that by going from 80mm to 60mm you are decreasing the area immensely. That would increase the airflow coming out of the 60mm end, but would cause big backpressure for the fan. Thus, the fan wouldn't be as efficent and also would be louder. So you would get minimal improvement at best. BTW, there are already adapters for 80mm fan to 60mm hs, does basically what you suggested.

 

[Nerdwannabe]

Originally posted by: Mist
Re: It's been done already

That's a German site and I can't find a mention of that product on Coolermasters website anywhere.

Michael.

You mean over here?!

 

[Nerdwannabe]

Originally posted by: OulOat

Originally posted by: Mist
Re: It's been done already

That's a German site and I can't find a mention of that product on Coolermasters website anywhere.

Michael.

It's not Coolermaster, it's Vantec.

I am talking about Cooler Master fan.
TMD is from Vantec.
Both fans have same concept of trying to narrow the dead spot.
There are still issues with both fans.
TMD fan *might* still have a small dead spot in the middle and fan rpm is limited.
Mouse cage fan from cooler master has low cfm vs noise ratio (~27cfm @40+ db).
The advantage of mouse cage fan is it's high air pressure which is espeically good for narrow fin gap heatsinks like SLK-XXX.