Shroud height?

mx · 10-26-2005, 05:35 AM

What's the optimal height for a fan shroud?

bobo5195 · 10-26-2005, 05:51 AM

tricky question.

about 1.2m but you didnt want to hear that. Look at the height on thermochills and punt guess something about that probably want to make it on the larger size.

Marci · 10-26-2005, 08:26 AM

Thermochill Shroud depth for the PS120 range is only the depth that it is because the customer who originally asked for a shroud template specified he wanted that depth... from the one he produced, loads more contacted us asking if we could make em, so we churned em out based on that original design spec... it wasn't a calculated figure for anything other than his space requirements.

Personally I'd have gone bigger too... around 70mm from fan to core surface...

Cyco-Dude · 10-26-2005, 09:05 AM

that is a good question. i suppose it depends on how much space you have at your disposal? my watercooling stuff is all inside my case; my shroud is one inch deep.

how deep can you make it befor the fan is useless? unlimited? someone should make a variable shroud with a max distance something bizarre like 20 or 30 feet. get an airflow meter to see if the distance affects the fans performance.

hmm....i have a spare fan and a dead 'core....and a LOT of cardboard boxes. whats a decent airflow meter that doesn't cost too much?

BillA · 10-26-2005, 09:20 AM

Fan Engn suggests 40% of the fan dia, for larger apps
I've found that a 1/4" helps, more not noticeable re performance

absolute low noise not addressed in the above

bobo5195 · 10-26-2005, 09:54 AM

cyco equatiosn suggest that it need not be above 1.2m so 30ft is not required but at this distance the effect of wall friction on the fan and of a fully developed velocity profile needs to be considere

I'm not sure of the info of what bill speaks but it sounds a good ball park figure as a nice minimum.

csimon · 10-26-2005, 10:11 AM

Quote:

Originally Posted by Marci

Thermochill Shroud depth for the PS120 range is only the depth that it is because the customer who originally asked for a shroud template specified he wanted that depth... from the one he produced, loads more contacted us asking if we could make em, so we churned em out based on that original design spec... it wasn't a calculated figure for anything other than his space requirements.

Personally I'd have gone bigger too... around 70mm from fan to core surface...

what's the pa160 shroud depth?

Marci · 10-26-2005, 10:18 AM

50mm

csimon · 10-26-2005, 10:49 AM

Quote:

Originally Posted by Marci

50mm

thanks marci ...and the tank depth is half of that?

Marci · 10-26-2005, 10:55 AM

http://www.thermochill.com/guides/pa160template.pdf

csimon · 10-26-2005, 11:05 AM

hmmm ...I have that pdf but the only thing missing is the tank & shroud depths. Unless I'm missing it somehow?

csimon · 10-26-2005, 01:38 PM

if Overall dimensions HxWxD = 214x166x50mm (90mm inc shroud).. that leaves 40 for the shroud ...*confused*

csimon · 10-26-2005, 03:00 PM

Quote:

Originally Posted by csimon

if Overall dimensions HxWxD = 214x166x50mm (90mm inc shroud).. that leaves 40 for the shroud ...*confused*

I think I have it sorted out now ...sorry for the confusion.

I'll assume that the 214x166x50 dimensions include the barbs extension.
If I go by the pdf measurements I should be safe.

So I should be ok with 206x165x40 for the rad excluding barbs and 174x165x50 for the shroud.

If I convert that to imperial measurements (16ths) I come out with:

Rad: 8-1/8" x 6-1/2" x 1-9/16"
Shroud: 6-7/8" x 6-1/2" x 1-15/16"

Thanks for your help
Sorry for the hijack
csimon

Long Haired Git · 10-26-2005, 10:38 PM

Seems to me this question just keeps coming up time and time again.
Maybe someone who can measure delta-T's well can also look to be able to measure dBA and do a test?
Perhaps construct a simple shroud using styrofoam that is like a foot from fan to rad, and then shave off an inch at a a time and measure the delta-T or C/W and the dBA when fan is pushing then pulling.
Suggest PA120.1 and one fan at 12v?
Volunteers?

10-26-2005, 05:35 AM	#1
mx Cooling Neophyte Join Date: Oct 2005 Location: Sweden Posts: 73	Shroud height? What's the optimal height for a fan shroud?

10-26-2005, 08:26 AM	#3
Marci Cooling Savant Join Date: May 2003 Location: Wakefield, West Yorkshire, UK Posts: 486	Thermochill Shroud depth for the PS120 range is only the depth that it is because the customer who originally asked for a shroud template specified he wanted that depth... from the one he produced, loads more contacted us asking if we could make em, so we churned em out based on that original design spec... it wasn't a calculated figure for anything other than his space requirements. Personally I'd have gone bigger too... around 70mm from fan to core surface... __________________ www.minimotosidecars.org / www.thermochill.com / www.themusiccollective.co.uk

10-26-2005, 10:18 AM	#8
Marci Cooling Savant Join Date: May 2003 Location: Wakefield, West Yorkshire, UK Posts: 486	50mm __________________ www.minimotosidecars.org / www.thermochill.com / www.themusiccollective.co.uk

10-26-2005, 10:55 AM	#10
Marci Cooling Savant Join Date: May 2003 Location: Wakefield, West Yorkshire, UK Posts: 486	http://www.thermochill.com/guides/pa160template.pdf __________________ www.minimotosidecars.org / www.thermochill.com / www.themusiccollective.co.uk

10-26-2005, 11:05 AM	#11
csimon Cooling Neophyte Join Date: Apr 2005 Location: Acadiana Posts: 99	hmmm ...I have that pdf but the only thing missing is the tank & shroud depths. Unless I'm missing it somehow? Last edited by csimon; 10-26-2005 at 11:10 AM.

10-26-2005, 05:51 AM	#2
bobo5195 Cooling Savant Join Date: Aug 2005 Location: uk Posts: 400	tricky question. about 1.2m but you didnt want to hear that. Look at the height on thermochills and punt guess something about that probably want to make it on the larger size.

10-26-2005, 09:05 AM	#4
Cyco-Dude Cooling Savant Join Date: Feb 2002 Location: Dayton, Ohio Posts: 836	that is a good question. i suppose it depends on how much space you have at your disposal? my watercooling stuff is all inside my case; my shroud is one inch deep. how deep can you make it befor the fan is useless? unlimited? someone should make a variable shroud with a max distance something bizarre like 20 or 30 feet. get an airflow meter to see if the distance affects the fans performance. hmm....i have a spare fan and a dead 'core....and a LOT of cardboard boxes. whats a decent airflow meter that doesn't cost too much?

10-26-2005, 09:20 AM	#5
BillA CoolingWorks Tech Guy Formerly "Unregistered" Join Date: Dec 2000 Location: Posts: 2,371.493,106 Posts: 4,440	Fan Engn suggests 40% of the fan dia, for larger apps I've found that a 1/4" helps, more not noticeable re performance absolute low noise not addressed in the above

10-26-2005, 09:54 AM	#6
bobo5195 Cooling Savant Join Date: Aug 2005 Location: uk Posts: 400	cyco equatiosn suggest that it need not be above 1.2m so 30ft is not required but at this distance the effect of wall friction on the fan and of a fully developed velocity profile needs to be considere I'm not sure of the info of what bill speaks but it sounds a good ball park figure as a nice minimum.

10-26-2005, 01:38 PM	#12
csimon Cooling Neophyte Join Date: Apr 2005 Location: Acadiana Posts: 99	if Overall dimensions HxWxD = 214x166x50mm (90mm inc shroud).. that leaves 40 for the shroud ...confused

10-26-2005, 10:38 PM	#14
Long Haired Git Cooling Savant Join Date: Jan 2003 Location: Sydney, Oz Posts: 336	Seems to me this question just keeps coming up time and time again. Maybe someone who can measure delta-T's well can also look to be able to measure dBA and do a test? Perhaps construct a simple shroud using styrofoam that is like a foot from fan to rad, and then shave off an inch at a a time and measure the delta-T or C/W and the dBA when fan is pushing then pulling. Suggest PA120.1 and one fan at 12v? Volunteers? __________________ Long Haired Git "Securing an environment of Windows platforms from abuse - external or internal - is akin to trying to install sprinklers in a fireworks factory where smoking on the job is permitted." (Prof. Gene Spafford) My Rig, in all its glory, can be seen best here AMD XP1600 @ 1530 Mhz \| Soyo Dragon + \| 256 Mb PC2700 DDRAM \| 2 x 40 Gb 7200rpm in Raid-0 \| Maze 2, eheim 1250, dual heater cores! \| Full specifications (PCDB)

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