Overclock.net › Forums › Cooling › Air Cooling › OCN Dave's Air Cooling Guide
New Posts  All Forums:Forum Nav:

OCN Dave's Air Cooling Guide - Page 162

post #1611 of 2323
Quote:
Originally Posted by doyll View Post

Only thing obvious is the noise in our ears.
Airflow and static pressure are far from obvious .. as you are well know. Asstimating isn't very scientific or accurate. rolleyes.gif

Static pressure is derived from the difference between the air flow during a measured obstruction, and unobstructed air flow. It takes all three numbers to figure Static pressure.
Estimating isn't very scientific or accurate, but perfection is often not worth the effort.
Using touch to feel flow though the cooler, and seeing good cooling performance, is good enough for most of us.
That being said, "4 times the static pressure" is a very bold clame to make with no solid ground to stand on.

Quote:
Originally Posted by DaveLT View Post

It's on paper bro. Do I need to measure it what for?
SP is quite obvious once you have a yardstick, like for example my jetflo 120 I know the SP on that thing and I can measure the airflow coming out of a rad and then estimate how much SP it has by using basic maths.

For credibility. If it is so easy, what is the problem with just showing us this basic math proving that fan has 4 times the static pressure.
If you have accurate flow measurements, a known measured flow obstruction, and the math is sound, it is not an estimate, you're dead on.

Quote:
Originally Posted by TheBloodEagle View Post

Ball Bearings tend to be the nosiest though, no? But that's definitely my biggest option.

Each type of bearing has its good points and bad points.
For a fan facing upward, avoid sleeve bearings. Sleeve bearings wear a lot faster when mounted in any orientation other than vertical.

Ball Bearings are very free flowing, efficient, quiet (if maintained well), endure hot temps better, and are the preferred bearing for high performance and high out-putt fans.

Rifle bearings are sleeves that have a spiral groove in the contact surface that pumps lubricating fluid from a reservoir. Fluid Dynamic Bearings, and Hydro Dynamic Bearings are similar, and all share a high degree of the ball bearings good points, including life span.

A Magnetic bearing fan's shaft floats in a magnetic field. This seems like it would be the perfect bearing, but this fan's Achilles Hill is the low CFM out-putt that its design limitations confine it to.
Edited by Luke Cool - 10/18/14 at 8:54pm
post #1612 of 2323
Quote:
Static pressure is derived from the difference between the air flow during a measured obstruction, and unobstructed air flow.
Estimating isn't very scientific or accurate, but perfection is often not worth the effort.
Using touch to feel flow though the cooler, and seeing good cooling performance, is good enough for most of us.
That being said, "4 times the static pressure" is a very bold clam to make with no solid ground to stand on.
 
...Yep...:thumb: well said
2.2 kW Holodeck
(14 items)
 
Chernobyl
(0 items)
Power Station
(0 items)
CPUMotherboardGraphicsRAM
AMD FX-8350 @ 5.2GHz Gigabyte GA-990-FXA-UD7 4 x MSI R 290X 4GB Gaming 16GB Corsair Dominator Platinum 2133 
Hard DriveOptical DriveCoolingOS
4 x Seagate 1 TB 7200 2 x Asus Optiarc Koolance 370 CPU WB/ AlphaCool Water cooling: ... Windows 7 Professional 
MonitorKeyboardPowerCase
1x3+1 Eyefiniy 5760x1080 Gigabyte 8100K V.2 1-AX1200w + 2x FSP x500w Coolermaster Cosmos II Full Tower 
  hide details  
Reply
2.2 kW Holodeck
(14 items)
 
Chernobyl
(0 items)
Power Station
(0 items)
CPUMotherboardGraphicsRAM
AMD FX-8350 @ 5.2GHz Gigabyte GA-990-FXA-UD7 4 x MSI R 290X 4GB Gaming 16GB Corsair Dominator Platinum 2133 
Hard DriveOptical DriveCoolingOS
4 x Seagate 1 TB 7200 2 x Asus Optiarc Koolance 370 CPU WB/ AlphaCool Water cooling: ... Windows 7 Professional 
MonitorKeyboardPowerCase
1x3+1 Eyefiniy 5760x1080 Gigabyte 8100K V.2 1-AX1200w + 2x FSP x500w Coolermaster Cosmos II Full Tower 
  hide details  
Reply
post #1613 of 2323
Thread Starter 
Quote:
Originally Posted by TheBloodEagle View Post

Ball Bearings tend to be the nosiest though, no? But that's definitely my biggest option.
Noisiest, not really. I tend to be unable to hear 2BB bearings.
Quote:
Originally Posted by Luke Cool View Post

Static pressure is derived from the difference between the air flow during a measured obstruction, and unobstructed air flow. It takes all three numbers to figure Static pressure.
Estimating isn't very scientific or accurate, but perfection is often not worth the effort.
Using touch to feel flow though the cooler, and seeing good cooling performance, is good enough for most of us.
That being said, "4 times the static pressure" is a very bold clame to make with no solid ground to stand on.
For credibility. If it is so easy, what is the problem with just showing us this basic math proving that fan has 4 times the static pressure.
If you have accurate flow measurements, a known measured flow obstruction, and the math is sound, it is not an estimate, you're dead on.
It's already on paper. Unless you suggest delta is lying about their specs?
I know a jetflo 120 to be about 3mm h2o on paper. the flow obstruction on my rad collapses the airflow to about half meaning it's about 1.5mmH2O.
Does the math need to be anymore complicated? Come on.
Ayase Eli
(20 items)
 
Testbench
(10 items)
 
MC Server
(13 items)
 
CPUMotherboardGraphicsRAM
AMD Ryzen 7 1700 ASRock X370 SLI Killer Zotac GTX1070 "FE" with ID Cooling Frostflow 240G Crucial BallistiX Sport LP 16GB 8x2GB 
Hard DriveHard DriveHard DriveCooling
Zotac SSD Premium 480GB OCZ Vector 180 480GB Hitachi 7K3000 3TB 7200rpm ID Cooling Frostflow 240L 
CoolingCoolingCoolingCooling
ID Cooling Frostflow 240G Phanteks F140MP x2 CoolerMaster Silencio FP120 x2 Phanteks F140SP 
CoolingMonitorKeyboardPower
Delta AFB1212SH x2 Dell U2713HM CM Storm MECH FSP Aurum PT 1200 
CaseMouseMouse PadAudio
Phanteks Enthoo Pro Logitech G102 Tesoro Aegis X3 Virtus.Pro AKG K7XX 
CPUMotherboardGraphicsRAM
Intel i7 6700k Gigabyte Z170X-UD5 Depends Depends 
Hard DriveCoolingMonitorKeyboard
Plextor M5S Depends Dell U2312HM CM Storm Quickfire Rapid-i 
PowerMouse
FSP Aurum PT 1200 CM Storm Mizar 
CPUMotherboardGraphicsRAM
Intel i7 2600 4GHz Gigabyte Z77X D3H Intel HD Graphics 2000 obviously Kingston HyperX Genesis 4X4GB DDR3 1600 
Hard DriveCoolingCoolingCooling
Intel 530 240GB Deepcool Captain 240 Arctic Cooling Bionix 140 Delta AFB1212L 
OSPowerCase
Windows 10 Pro CoolerMaster G750M NZXT Switch 810 
  hide details  
Reply
Ayase Eli
(20 items)
 
Testbench
(10 items)
 
MC Server
(13 items)
 
CPUMotherboardGraphicsRAM
AMD Ryzen 7 1700 ASRock X370 SLI Killer Zotac GTX1070 "FE" with ID Cooling Frostflow 240G Crucial BallistiX Sport LP 16GB 8x2GB 
Hard DriveHard DriveHard DriveCooling
Zotac SSD Premium 480GB OCZ Vector 180 480GB Hitachi 7K3000 3TB 7200rpm ID Cooling Frostflow 240L 
CoolingCoolingCoolingCooling
ID Cooling Frostflow 240G Phanteks F140MP x2 CoolerMaster Silencio FP120 x2 Phanteks F140SP 
CoolingMonitorKeyboardPower
Delta AFB1212SH x2 Dell U2713HM CM Storm MECH FSP Aurum PT 1200 
CaseMouseMouse PadAudio
Phanteks Enthoo Pro Logitech G102 Tesoro Aegis X3 Virtus.Pro AKG K7XX 
CPUMotherboardGraphicsRAM
Intel i7 6700k Gigabyte Z170X-UD5 Depends Depends 
Hard DriveCoolingMonitorKeyboard
Plextor M5S Depends Dell U2312HM CM Storm Quickfire Rapid-i 
PowerMouse
FSP Aurum PT 1200 CM Storm Mizar 
CPUMotherboardGraphicsRAM
Intel i7 2600 4GHz Gigabyte Z77X D3H Intel HD Graphics 2000 obviously Kingston HyperX Genesis 4X4GB DDR3 1600 
Hard DriveCoolingCoolingCooling
Intel 530 240GB Deepcool Captain 240 Arctic Cooling Bionix 140 Delta AFB1212L 
OSPowerCase
Windows 10 Pro CoolerMaster G750M NZXT Switch 810 
  hide details  
Reply
post #1614 of 2323
Quote:
Originally Posted by DaveLT View Post

Noisiest, not really. I tend to be unable to hear 2BB bearings.

It's already on paper. Unless you suggest delta is lying about their specs?
I know a jetflo 120 to be about 3mm h2o on paper. the flow obstruction on my rad collapses the airflow to about half meaning it's about 1.5mmH2O.
Does the math need to be anymore complicated? Come on.

I think that's a half baked answer, a poor effort.
I'm not trying to insult you, I'm trying to help, so please listen with an open mind.
2.72 mmH2O is at NO (zero) air flow. Your rad collapsing the airflow half this much has no bearing on this discussion. This statement shows that you do not understand how this measurement was made. Water is the measured flow obstruction. (see the URL just below)
Also, Your communication skills make you appear un-reputable.
http://www.solutionsforair.com/dayton_content/pdfs/staticpressure.pdf
I found your 4 times number to be correct, this is an unarguable way to answer.

FFB1212VHE
http://datasheet.octopart.com/FFB1212VHE-F00-Delta-Product-Groups-datasheet-17722952.pdf
11.3 (9.13 min) mm h2o
.445 (.36 min) inch h2o

jetflo 120
http://www.hitechlegion.com/reviews/cooling/heatsinks/37473-cm-jetflo-120?showall=&start=1
2.72 mmH2O

This took very little effort to look up. Show sources
We all teach each other.
Edited by Luke Cool - 10/18/14 at 11:01pm
post #1615 of 2323
has any 1 seen this
http://m.youtube.com/watch?v=Uz9Xg25HC3I

not the best option for cooling but might be a good affordable option for a side/bottom/top or rear
what do you guys think?
post #1616 of 2323

in The spirit of what Luke has been saying, we have a winner with the jet flo's 

120mm & 140mm. well over 100 CFM, but more importantly the ability to move through radiator is incredible. 

2.2 kW Holodeck
(14 items)
 
Chernobyl
(0 items)
Power Station
(0 items)
CPUMotherboardGraphicsRAM
AMD FX-8350 @ 5.2GHz Gigabyte GA-990-FXA-UD7 4 x MSI R 290X 4GB Gaming 16GB Corsair Dominator Platinum 2133 
Hard DriveOptical DriveCoolingOS
4 x Seagate 1 TB 7200 2 x Asus Optiarc Koolance 370 CPU WB/ AlphaCool Water cooling: ... Windows 7 Professional 
MonitorKeyboardPowerCase
1x3+1 Eyefiniy 5760x1080 Gigabyte 8100K V.2 1-AX1200w + 2x FSP x500w Coolermaster Cosmos II Full Tower 
  hide details  
Reply
2.2 kW Holodeck
(14 items)
 
Chernobyl
(0 items)
Power Station
(0 items)
CPUMotherboardGraphicsRAM
AMD FX-8350 @ 5.2GHz Gigabyte GA-990-FXA-UD7 4 x MSI R 290X 4GB Gaming 16GB Corsair Dominator Platinum 2133 
Hard DriveOptical DriveCoolingOS
4 x Seagate 1 TB 7200 2 x Asus Optiarc Koolance 370 CPU WB/ AlphaCool Water cooling: ... Windows 7 Professional 
MonitorKeyboardPowerCase
1x3+1 Eyefiniy 5760x1080 Gigabyte 8100K V.2 1-AX1200w + 2x FSP x500w Coolermaster Cosmos II Full Tower 
  hide details  
Reply
post #1617 of 2323
im not disagreing..each to its own
ive been merely ????ning that results as the most reviews and trusted builders ive seen live all state otherwise?
everyone of them are saying what im saying:
Great fan:yes
good airflo:yes
good sp : yes but only as a case fan not for radiators or heatsinks and loses alot of air due too the open blade design.and round frame.same as the sp fans..if the blades were a bit wider then it would be even closer to 100%..this is the only benefit to the sp120 design..the blades..
noise ratio: gets loud above 1200rpm..

so im not saying its total crap..just not the be all and end all..same with deltas..

im truly sorry if it has seemed im undermining or trolling..but im not
i just cant accept that there "can only be 1"
solution to everything..
sorry..not my nature..
post #1618 of 2323
Quote:
Originally Posted by Luke Cool View Post


Static pressure is derived from the difference between the air flow during a measured obstruction, and unobstructed air flow. It takes all three numbers to figure Static pressure.
Estimating isn't very scientific or accurate, but perfection is often not worth the effort.
Using touch to feel flow though the cooler, and seeing good cooling performance, is good enough for most of us.
That being said, "4 times the static pressure" is a very bold clame to make with no solid ground to stand on.


For credibility. If it is so easy, what is the problem with just showing us this basic math proving that fan has 4 times the static pressure.
If you have accurate flow measurements, a known measured flow obstruction, and the math is sound, it is not an estimate, you're dead on.
The problem is resistance changes as air speed / airflow changes. That is why it needs to be measured, not calculated.


I'm working on a test station with manometer, anemometer, and dBA. Hopefully it wil work as planned.
post #1619 of 2323
doyll sorry to ask you..but whats your thaughts on this

http://m.youtube.com/watch?v=Uz9Xg25HC3I
post #1620 of 2323
Quote:
Originally Posted by X-PREDATOR View Post

doyll sorry to ask you..but whats your thaughts on this

http://m.youtube.com/watch?v=Uz9Xg25HC3I
It was a total waste of time .. even skipping through it. tongue.gif
No testing, nothing of interest at all.
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Air Cooling
Overclock.net › Forums › Cooling › Air Cooling › OCN Dave's Air Cooling Guide