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How to know how to design a radiator? - Page 2

post #11 of 13
Thread Starter 
Quote:
Originally Posted by nleksan View Post

I have always thought that using fins shaped like those on liquid cooling rads would be a great way to increase surface area, essentially they would have a shape similar to /\/\/\/\/\/\
Also, if you are using heatpipes then arrange them so they are all able to directly face the fans, sort of like /\/\||/\/\||/\/\||/\/\||/\/\
(the bends are fins, the vertical lines are heat pipes).
If you really want to make the best possible cooler, skip aluminum and make the fins copper as well.
Another way to increase efficiency would be to have dimples in the fins, like a golf ball, to increase the amount of air actually contacting the surface of the fins.
Take a look at the current top performing heatsinks and just copy their overall design (i.e. Direct touch heatpipes, and two separate sets of fins) but find a way to increase the surface area as mentioned above, and possibly make the base of the heatsink and the heatpipes from one piece of C110 copper. You may be able to do this by forming the product, but cutting the tips off the heatpipes and adding the appropriate amount of liquid before welding them shut.
Such a design would allow for 3 fans, and if you can, make it so that the center fan is shrouded to prevent air from leaking from the sides before reaching it. Also, if you design it to accommodate 38mm thick fans, you can increase the fin count due to the inherent pressure benefits of such fans.
Perhaps a 140mm or 120mm fan at the front, a 120x38mm in the center, and a 120 or 140mm fan at the rear.
I would also test the effects of having a shroud covering the entire heatsink vs no shroud, and then go with whichever performs better. Having a fan mounted at the bottom of the fin stack but above the base may help to not only cool the VRMs but also "push away" their hot air. Make it so that this fan is on a pivot, and can be aimed directly at the VRMs/MOSFET area, and the effect may be even greater.
If you could produce such a piece, and keep the cost at or around $100-120, and it outperforms the current crop of "absolutely best air cooling units", I am sure that people would be interested. You would have to send out a number for review, at no charge, to all the major sites, but if you can include 2x 140mm + 1x 120x38mm fan in the overall cost, and it has a noticeable performance benefit, you may do quite well.
Keep in mind that the clientele for such a cooler will be limited somewhat, but if you can produce something that performs better than the Nocta, Thermalright, Phanteks, and such, by 2-5C, you will be a hero to everyone who prefers air over water.
Be prepared to spend months/years in development, and you need to test hundreds or thousands of designs and tweaks, but get it right and I will buy one myself.

Thanks thumb.gif I know this will take a long time, I'm prepared to invest years into it.

I've heard that aluminum, despite being worse in internal heat transfer, interacts better with air than copper does. Don't know if it's true..
Also, all copper fins will dramatically raise the cost for only a minimal raise in performance (or none, if the above myth holds).

Thanks for the great tips thumb.gif
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My Rig
(14 items)
 
Ex-wife's Rig
(15 items)
 
 
CPUMotherboardGraphicsRAM
Core i5 4460 AsRock H81M-DG4 Sapphire Rx470 Platinum KVR 1600 16Gb 
Hard DriveHard DriveCoolingOS
2x Seagate 3Tb Samsung 850 EVO 120 Scythe Ninja 3 Rev.B Windows 10 Pro 
MonitorKeyboardPowerCase
Fujitsu Siemens A17-2A Logitech K280e SuperFlower SF-550K12XP Thermaltake Versa H25 
MouseAudio
Logitech G402 Sony MDR XD150 
CPUMotherboardGraphicsRAM
Athlon 750K 4.0Ghz AsRock FM2A75 Pro4+ Sapphire R9 270X Dual-X Kingston 2x4Gb 1600 
Hard DriveHard DriveOptical DriveCooling
Samsung 850 EVO 120  Western Digital 320Gb LiteON DVD-RW CoolerMaster Hyper Z600 
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Windows 7 Pro x64 Toshiba 32" FullHD TV Logitech FSP Hexa 550 
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post #12 of 13
Thread Starter 
BTW how can I possibly point the pipes AT the fan? The fins attached to the pipe have to be perpendicular. If the pipe points to the fan, it will blow at the top-most fin only thinking.gif Or am I missing something?
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CPUMotherboardGraphicsRAM
Core i5 4460 AsRock H81M-DG4 Sapphire Rx470 Platinum KVR 1600 16Gb 
Hard DriveHard DriveCoolingOS
2x Seagate 3Tb Samsung 850 EVO 120 Scythe Ninja 3 Rev.B Windows 10 Pro 
MonitorKeyboardPowerCase
Fujitsu Siemens A17-2A Logitech K280e SuperFlower SF-550K12XP Thermaltake Versa H25 
MouseAudio
Logitech G402 Sony MDR XD150 
CPUMotherboardGraphicsRAM
Athlon 750K 4.0Ghz AsRock FM2A75 Pro4+ Sapphire R9 270X Dual-X Kingston 2x4Gb 1600 
Hard DriveHard DriveOptical DriveCooling
Samsung 850 EVO 120  Western Digital 320Gb LiteON DVD-RW CoolerMaster Hyper Z600 
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My Rig
(14 items)
 
Ex-wife's Rig
(15 items)
 
 
CPUMotherboardGraphicsRAM
Core i5 4460 AsRock H81M-DG4 Sapphire Rx470 Platinum KVR 1600 16Gb 
Hard DriveHard DriveCoolingOS
2x Seagate 3Tb Samsung 850 EVO 120 Scythe Ninja 3 Rev.B Windows 10 Pro 
MonitorKeyboardPowerCase
Fujitsu Siemens A17-2A Logitech K280e SuperFlower SF-550K12XP Thermaltake Versa H25 
MouseAudio
Logitech G402 Sony MDR XD150 
CPUMotherboardGraphicsRAM
Athlon 750K 4.0Ghz AsRock FM2A75 Pro4+ Sapphire R9 270X Dual-X Kingston 2x4Gb 1600 
Hard DriveHard DriveOptical DriveCooling
Samsung 850 EVO 120  Western Digital 320Gb LiteON DVD-RW CoolerMaster Hyper Z600 
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Windows 7 Pro x64 Toshiba 32" FullHD TV Logitech FSP Hexa 550 
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post #13 of 13
Sorry, I didn't explain that part very clearly. What I mean is that instead of the heatpipes being in two straight lines on either side facing up, they would instead form a parallel line that is parallel to the fan. That way, every heatpipe is directly in front of the fan. The reason for this is that each pipe would receive the same amount of airflow, so that the air doesn't have to "bend" around each one to hit the next.

I can't speak to whether or not having copper fins would be beneficial, but it seems like it may be worth investigation. Perhaps nickel plated copper fins?
   
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EVGA GTX780Ti Classified K|ngp|n Edition @ 1483... 16GB G.Skill Ripjaws-Z @ DDR3-2248 9-10-9-26 1T Samsung 830 256GB SSD WD10EZEX 1TB HDD 
Hard DriveHard DriveHard DriveHard Drive
WD10EALX 1TB HDD Seagate Barracuda 7200.14 1TB WD3200AAKS 320GB HDD WD5000HHTZ 10krpm 500GB VelociRaptor 
Optical DriveCoolingCoolingCooling
LG/Hitachi Slim DVD-R/W Custom MB-Backside VRM-sinks (Copper) 3x NZXT RF-FX140LB 1-2krpm 98.3CFM Case Fans 2x Corsair SP120-PE Case Fans 
CoolingCoolingCoolingCooling
Heatkiller GTX680 "Hole Edition" Block + Backplate XSPC Single-Bay Res (Single 5.25 bay) EK Multioption Res X2 - Advanced 150 DD "Fill-Port Res" + Fill-Port Fitting (Red) 
CoolingCoolingCoolingCooling
2x MCP35X + Heatsinks/80x15mm Fan XSPC EX420 Alphacool NeXXos UT60 240 6x Bgears Blasters 140mm 1800rpm Fans 
CoolingCoolingCoolingOS
4x Koolance 120x25mm 2600rpm Fans Comp/Rotary Fittings (BP/XSPC/Monsoon) Primoflex Pro LRT - White (1/2x3/4) Windows 7 Professional 64bit  
MonitorMonitorMonitorMonitor
Dell P2210Hb 21.5" 1920x1080p Viewsonic VA2012WB 20.1" LCD 1680x1050 Dell U3014 Eizo 27" 1440p 10bit RGB-LED Backlit AH-IPS Panel 
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OtherOtherOther
Sleeved Wires w Paracord myself (no Heatshrink) Custom Front and Top Panels w HexxMesh *In Prog... Working on Custom Pedestal Prototype 
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