Fan Identification... Help? - Tilted Forum Project Discussion Community

Sp0rAdiC · 07-12-2006, 12:33 PM

Alright, I've got a picture of a fan that I need, but I can't figure out what it is. If anyone could get me any information on what this fan is, I'd be very appreciative.

Edit: I know it looks like a generic PC fan, but I need to know about this specific one. Thank you!

Frosstbyte · 07-12-2006, 12:41 PM

I can't be of much help, since I don't recognize it, but copy paste this in a new window to see the fan, since it rexxed for me.

http://www.icmag.com/gallery/data/500/12123Fan.jpg

Redlemon · 07-12-2006, 12:47 PM

The key is to upload the image to someplace like ImageShack.

My question to you, is, why do you care about a picture of a fan hidden in the subdirectories of International Cannagraphic?

Sp0rAdiC · 07-12-2006, 08:33 PM

Well I was in a hurry, the hosting I have access to sucks, I couldn't attach the image to this post, and I had to get to work so I just put the image there. It worked for me, but it must have been cached. So... thanks much for the hosting RedLemon, and this fan can supposedly pull air through a filter, which is something that not many PC fans are capable of without losing a very large percentage of their CFMs, so I want to find if this fan is somehow different, or if it's the filter that the person is using them in is different. I've asked him but he hasn't responded for a while, but I'm just being impatient.

cyrnel · 07-12-2006, 09:10 PM

What's are the dimensions?

What's printed on the label? It should at least have manufacturer and model with voltage, current, possibly RPM. The blade cut doesn't look unusual but the motor looks robust. Guessing that's the difference.

Physics junkies will be better able to answer this but the ideal fan design for working against resistance is a positive displacement blower. (squirrel cage) A radial fan like those used in PCs are always at a disadvantage. They'll tend to blow backwards through the leaks as resistance increases or draw a vacuum and burn up from lack of cooling. (depends on push or pull) The only way I know to compensate is a powerful motor and close tolerance blade, but you still need to be careful about filter media and ducting resistance.

Try Heating/AC shops for media. They'll usually have large rolls or filter discards with usable material. You want the thin backing layer. It'll look much like the foam included with these:

but big filters use a wide variety of thicknesses.

If you want much air volume with filters, and without a bunch of noise there isn't much to do besides increase fan area. I try to run the biggest baddest fans that'll fit for intake, cut to 7V, and drawing through filters. The goal is slightly positive case pressure to keep things clean without howling intake. If the room's quiet it's still noticeable.

Sp0rAdiC · 07-12-2006, 09:21 PM

If I had the dimensions I'd give give them to you, and if I could see the sticker we wouldn't need this thread >.<

But yeah, everything you just said is right, most people end up just getting a centrifugal fan so they don't have to deal with the back pressure issue, but I'd rather not have such a noisy bulky thing. I'll be pulling air through a layer of activated carbon air filter that's about .75" thick. I could have it half as thick but I don't know if that would filter the air sufficiently. I think I've got the entire filter designed, it's now just an issue of the fan.

The filter is going to be a cylinder, 4" diameter, 12" long, with 3/4" of air filter wrapped around the outside, and a fan pulling air through the filter into a 4" duct.

cyrnel · 07-12-2006, 09:33 PM

Heh. Sorry. I thought it was your picture.

So it's a cylinder drawing in through the sides and exhausting out an end?

It could work but 3/4 media will need lots of oomph. You might try stacking fans of identical design. It'll still make the fans work. I tried stacked fans with a different intake approach (large ducted area, but boxed) but was never happy. Ended up moving to slow big fans and thin material and carefully matching intake and exhaust speeds. If I have brutal hot spots then they get pipes or water to move the heat elsewhere. No need to make the entire machine and my ears suffer because of ill-behaved components.

Activated carbon? Trying to keep out the bong smell?

Sp0rAdiC · 07-13-2006, 07:29 AM

Quote:

Originally Posted by cyrnel

Activated carbon? Trying to keep out the bong smell?

lol, something like that

Alright, thanks for your help, I hadn't really thought of stacking the fans but that would help. I might be able to get away with not double wrapping the filter, I dunno, I'll have to try

cyrnel · 07-13-2006, 10:41 AM

Try varying the speeds of different stages slightly. Optimum flow and noise depends on the fans.

Not sure if I should say "have fun" or "be careful."

07-12-2006, 12:33 PM	#1 (permalink)
Sp0rAdiC Insane Location: VT	Fan Identification... Help? Alright, I've got a picture of a fan that I need, but I can't figure out what it is. If anyone could get me any information on what this fan is, I'd be very appreciative. Edit: I know it looks like a generic PC fan, but I need to know about this specific one. Thank you!

07-12-2006, 12:47 PM	#3 (permalink)
Redlemon Devoted Donor Location: New England	The key is to upload the image to someplace like ImageShack. My question to you, is, why do you care about a picture of a fan hidden in the subdirectories of International Cannagraphic? __________________ I can't read your signature. Sorry.

07-12-2006, 09:10 PM	#5 (permalink)
cyrnel Adequate Location: In my angry-dome.	What's are the dimensions? What's printed on the label? It should at least have manufacturer and model with voltage, current, possibly RPM. The blade cut doesn't look unusual but the motor looks robust. Guessing that's the difference. Physics junkies will be better able to answer this but the ideal fan design for working against resistance is a positive displacement blower. (squirrel cage) A radial fan like those used in PCs are always at a disadvantage. They'll tend to blow backwards through the leaks as resistance increases or draw a vacuum and burn up from lack of cooling. (depends on push or pull) The only way I know to compensate is a powerful motor and close tolerance blade, but you still need to be careful about filter media and ducting resistance. Try Heating/AC shops for media. They'll usually have large rolls or filter discards with usable material. You want the thin backing layer. It'll look much like the foam included with these: but big filters use a wide variety of thicknesses. If you want much air volume with filters, and without a bunch of noise there isn't much to do besides increase fan area. I try to run the biggest baddest fans that'll fit for intake, cut to 7V, and drawing through filters. The goal is slightly positive case pressure to keep things clean without howling intake. If the room's quiet it's still noticeable. __________________ There are a vast number of people who are uninformed and heavily propagandized, but fundamentally decent. The propaganda that inundates them is effective when unchallenged, but much of it goes only skin deep. If they can be brought to raise questions and apply their decent instincts and basic intelligence, many people quickly escape the confines of the doctrinal system and are willing to do something to help others who are really suffering and oppressed." -Manufacturing Consent: Noam Chomsky and the Media, p. 195 Last edited by cyrnel; 07-12-2006 at 09:22 PM..

07-12-2006, 09:33 PM	#7 (permalink)
cyrnel Adequate Location: In my angry-dome.	Heh. Sorry. I thought it was your picture. So it's a cylinder drawing in through the sides and exhausting out an end? It could work but 3/4 media will need lots of oomph. You might try stacking fans of identical design. It'll still make the fans work. I tried stacked fans with a different intake approach (large ducted area, but boxed) but was never happy. Ended up moving to slow big fans and thin material and carefully matching intake and exhaust speeds. If I have brutal hot spots then they get pipes or water to move the heat elsewhere. No need to make the entire machine and my ears suffer because of ill-behaved components. Activated carbon? Trying to keep out the bong smell? __________________ There are a vast number of people who are uninformed and heavily propagandized, but fundamentally decent. The propaganda that inundates them is effective when unchallenged, but much of it goes only skin deep. If they can be brought to raise questions and apply their decent instincts and basic intelligence, many people quickly escape the confines of the doctrinal system and are willing to do something to help others who are really suffering and oppressed." -Manufacturing Consent: Noam Chomsky and the Media, p. 195

07-13-2006, 10:41 AM	#9 (permalink)
cyrnel Adequate Location: In my angry-dome.	Try varying the speeds of different stages slightly. Optimum flow and noise depends on the fans. Not sure if I should say "have fun" or "be careful." __________________ There are a vast number of people who are uninformed and heavily propagandized, but fundamentally decent. The propaganda that inundates them is effective when unchallenged, but much of it goes only skin deep. If they can be brought to raise questions and apply their decent instincts and basic intelligence, many people quickly escape the confines of the doctrinal system and are willing to do something to help others who are really suffering and oppressed." -Manufacturing Consent: Noam Chomsky and the Media, p. 195

07-12-2006, 12:41 PM	#2 (permalink)
Frosstbyte Winter is Coming Location: The North	I can't be of much help, since I don't recognize it, but copy paste this in a new window to see the fan, since it rexxed for me. http://www.icmag.com/gallery/data/500/12123Fan.jpg

07-12-2006, 08:33 PM	#4 (permalink)
Sp0rAdiC Insane Location: VT	Well I was in a hurry, the hosting I have access to sucks, I couldn't attach the image to this post, and I had to get to work so I just put the image there. It worked for me, but it must have been cached. So... thanks much for the hosting RedLemon, and this fan can supposedly pull air through a filter, which is something that not many PC fans are capable of without losing a very large percentage of their CFMs, so I want to find if this fan is somehow different, or if it's the filter that the person is using them in is different. I've asked him but he hasn't responded for a while, but I'm just being impatient.

07-12-2006, 09:21 PM	#6 (permalink)
Sp0rAdiC Insane Location: VT	If I had the dimensions I'd give give them to you, and if I could see the sticker we wouldn't need this thread >.< But yeah, everything you just said is right, most people end up just getting a centrifugal fan so they don't have to deal with the back pressure issue, but I'd rather not have such a noisy bulky thing. I'll be pulling air through a layer of activated carbon air filter that's about .75" thick. I could have it half as thick but I don't know if that would filter the air sufficiently. I think I've got the entire filter designed, it's now just an issue of the fan. The filter is going to be a cylinder, 4" diameter, 12" long, with 3/4" of air filter wrapped around the outside, and a fan pulling air through the filter into a 4" duct.