• Welcome to TechPowerUp Forums, Guest! Please check out our forum guidelines for info related to our community.

Why are heatpipes sealed and what would happen if they were opened?

JC316

Knows what makes you tick
Joined
Jan 24, 2006
Messages
9,371 (2.14/day)
Likes
1,002
System Name Budget Gaming
Processor AMD FX6300
Motherboard Gigabyte 880GMA-USB3
Cooling Coolermaster Hyper 212+
Memory 8GB Ripjaws DDR3 1600
Video Card(s) HD7850 1GB
Storage 1TB Sata2
Display(s) Acer 24" LED
Case Generic black
Audio Device(s) Stock onboard
Power Supply FSP Aurum Gold 650W
Software Windows 7 Home Premium 64bit
#1
This is a question that has been on my mind for a while and I can't seem to find an answer.

I mean, if heat rises and it's sealed at the top, then wouldn't the heat just stagnate? If the top was open, wouldn't the heat be forced out the top for a fan to suck it out? Just curious about this.
 
Joined
May 19, 2007
Messages
7,662 (1.97/day)
Likes
536
Location
c:\programs\kitteh.exe
Processor C2Q6600 @ 1.6 GHz
Motherboard Anus PQ5
Cooling ACFPro
Memory GEiL2 x 1 GB PC2 6400
Video Card(s) MSi 4830 (RIP)
Storage Seagate Barracuda 7200.10 320 GB Perpendicular Recording
Display(s) Dell 17'
Case El Cheepo
Audio Device(s) 7.1 Onboard
Power Supply Corsair TX750
Software MCE2K5
#2
nothings in there dude
 

POGE

New Member
Joined
Oct 28, 2005
Messages
1,585 (0.35/day)
Likes
33
Location
In banjo's Goats.
Processor Turion 64 ML-34 1.8Ghz
Motherboard Compaq Laptop Mobo
Cooling Stock Compaq Laptop Fan
Memory 1x 256 DDR333
Video Card(s) Radeon 200m
Storage 40GB 5200RPM HP
Display(s) Stock Laptop LCD
Case Laptop Case
Audio Device(s) Onboard Realtek
Power Supply Stock Laptop Powerbrick
Software Windows XP Pro
#3
Heatpipes arent just pipes, they are mini phase change systems. They contain a liquid that evaporates when heated, the hot gas moves along the pipe, and gets cooled again, turning back into a liquid, and repeating.
 
Joined
May 19, 2007
Messages
7,662 (1.97/day)
Likes
536
Location
c:\programs\kitteh.exe
Processor C2Q6600 @ 1.6 GHz
Motherboard Anus PQ5
Cooling ACFPro
Memory GEiL2 x 1 GB PC2 6400
Video Card(s) MSi 4830 (RIP)
Storage Seagate Barracuda 7200.10 320 GB Perpendicular Recording
Display(s) Dell 17'
Case El Cheepo
Audio Device(s) 7.1 Onboard
Power Supply Corsair TX750
Software MCE2K5
#4
some heatpipes nowadays are just "hotpipes"
 

JC316

Knows what makes you tick
Joined
Jan 24, 2006
Messages
9,371 (2.14/day)
Likes
1,002
System Name Budget Gaming
Processor AMD FX6300
Motherboard Gigabyte 880GMA-USB3
Cooling Coolermaster Hyper 212+
Memory 8GB Ripjaws DDR3 1600
Video Card(s) HD7850 1GB
Storage 1TB Sata2
Display(s) Acer 24" LED
Case Generic black
Audio Device(s) Stock onboard
Power Supply FSP Aurum Gold 650W
Software Windows 7 Home Premium 64bit
#5
Ok, the reason that I am asking is that my Thermaltake CL-PO370's heat pipes never get hot. They stay quite cool ALL the time, even when orthos is running and TAT is reporting 60*C.
 

sneekypeet

Super Moderator
Staff member
Joined
Apr 12, 2006
Messages
24,713 (5.75/day)
Likes
9,469
System Name His
Processor Intel i7 5930K
Motherboard Asus Maximus V Extreme
Cooling Thermalright True Spirit 140 BW Rev.A
Memory Corsair Dominator Platinum ROG
Video Card(s) nVidia GTX 1080 SLI with EVGA Hybrid coolers.
Storage Samsung 960 Pro / Crucial MX300 750GB / Seagate 1TB Spinner
Display(s) Sony 43" 4K 60hz
Case SilverStone Temjin TJ11
Audio Device(s) Realtek on board > Sony Receiver > Cerwin Vega's
Power Supply Thermaltake TPSG 1050W
Mouse Always Changing
Keyboard Always Changing
Software Windows 10 Pro 64
#6
Remember when dude modded his Zalman 9500 on water cooling? The thread started exactly this way. there were lots of theories about, and when he cut his open , he found hollow tubes of AIR.
 

tigger

I'm the only one
Joined
Mar 20, 2006
Messages
10,476 (2.42/day)
Likes
1,673
System Name Black to the Core MKIV
Processor Intel I7 6700k
Motherboard Asus Z170 Pro Gaming socket 1151
Cooling NZXT Kraken X61 280mm radiator
Memory 2x8gb Corsair vengeance LPX 2400 DDR4
Video Card(s) XFX Radeon R9 290 4gb ddr5
Storage Patriot Blast 120gb ssd Boot and WD10EADX-22TDHB0 1TB Data
Display(s) Dell 2408WFP 24" 1920x1200
Case Nzxt IS 340
Audio Device(s) Asus xonar dsx pci-e
Power Supply Corsair CX750
Mouse Logitech G502
Software Win 10 Pro x64
#7
depending on the liquid inside them,if you open them they will be ruined.without the fluid in the pipes they would not work as intended and would be no good.

if the pipes were empty they would not work,possibly when he opened them the liquid turned into a gas and escaped making the pipes seem emty.

if the pipes were empty,they would do no good at all on the heatsink.
 

POGE

New Member
Joined
Oct 28, 2005
Messages
1,585 (0.35/day)
Likes
33
Location
In banjo's Goats.
Processor Turion 64 ML-34 1.8Ghz
Motherboard Compaq Laptop Mobo
Cooling Stock Compaq Laptop Fan
Memory 1x 256 DDR333
Video Card(s) Radeon 200m
Storage 40GB 5200RPM HP
Display(s) Stock Laptop LCD
Case Laptop Case
Audio Device(s) Onboard Realtek
Power Supply Stock Laptop Powerbrick
Software Windows XP Pro
#8
@sneekypeet

Thats because when heatpipes are cut the vaccuum is broken and the liquid evaporates instantly under standard pressure. :)
 
Joined
Apr 2, 2007
Messages
2,807 (0.71/day)
Likes
230
Location
US
Processor Intel Q9400
Motherboard asus p5q-pro
Cooling Ultra120
Memory 6GB ddr2
Video Card(s) NVS 290
Storage 3TB + 1.5TB
Display(s) Samsung F2380
Case Silverstone Fortress FT02B
Audio Device(s) Creative X-Fi
Power Supply 750W PC P&C
Software win 7 ultimate 64bit
#9
When I run Bioshock, 3 heatpipes on my 7600gt Ultra V1 gets very hot to the touch and they are being cooled by 1 low rpm 80mm fan :D

BTW, i read somewhere that heatpipe can loose its cooling powers if too much heat applied to it
 

JC316

Knows what makes you tick
Joined
Jan 24, 2006
Messages
9,371 (2.14/day)
Likes
1,002
System Name Budget Gaming
Processor AMD FX6300
Motherboard Gigabyte 880GMA-USB3
Cooling Coolermaster Hyper 212+
Memory 8GB Ripjaws DDR3 1600
Video Card(s) HD7850 1GB
Storage 1TB Sata2
Display(s) Acer 24" LED
Case Generic black
Audio Device(s) Stock onboard
Power Supply FSP Aurum Gold 650W
Software Windows 7 Home Premium 64bit
#10
Yeah, I can feel the heat on my 8600, I could feel it on my Arctic freezer pro, but I can't feel it on this damned thermaltake.
 

sneekypeet

Super Moderator
Staff member
Joined
Apr 12, 2006
Messages
24,713 (5.75/day)
Likes
9,469
System Name His
Processor Intel i7 5930K
Motherboard Asus Maximus V Extreme
Cooling Thermalright True Spirit 140 BW Rev.A
Memory Corsair Dominator Platinum ROG
Video Card(s) nVidia GTX 1080 SLI with EVGA Hybrid coolers.
Storage Samsung 960 Pro / Crucial MX300 750GB / Seagate 1TB Spinner
Display(s) Sony 43" 4K 60hz
Case SilverStone Temjin TJ11
Audio Device(s) Realtek on board > Sony Receiver > Cerwin Vega's
Power Supply Thermaltake TPSG 1050W
Mouse Always Changing
Keyboard Always Changing
Software Windows 10 Pro 64
#11
@sneekypeet

Thats because when heatpipes are cut the vaccuum is broken and the liquid evaporates instantly under standard pressure. :)

That makes sence...I guess if I acctually was the one to cut them I would notice something like that. Was just goin off of what I remembered being posted. Thanks tho I did think it was "air" of some gassy derivation, and not liquid tho!
 
Joined
Feb 12, 2007
Messages
1,192 (0.30/day)
Likes
128
Location
scotland
System Name spuds K8-X2
Processor amd athlon X2 4200+ toledo s939 2794mhz 254x11 1.4 vcore
Motherboard MSI K8N Neo4-F v1.0 (MS-7125) nforce4 sata2 mod, laptop cpu heatpipe copper nb cooler
Cooling akasa evo "blue" + 90mm fan, 2x120mm front, 250mm side, 120mm rear, 120mm in psu, pci slot exhaust.
Memory OCZ Platinum XTC DDR PC3200 4GB(4x1024) @254mhz 3-3-3-8 2T
Video Card(s) sapphire HD3870 512mb GDDR4 vf900cu, several ramsinks on components / nvidia 7300gt 256mb secondary
Storage hitachi 160gb (slightly fried) / hitachi 120gb ATA / Seagate 160gb / 2x ps3 seagate 60gb
Display(s) CTX EX1300F 20" flat CRT, 1280x1024@100hz / 19" benq FP91G X / 19" hanns-g (all free)
Case mesh server/gaming black case, 9x 5.25' drive bays, silvestone auto fan controller
Audio Device(s) onboard realtek alc850 7.1/soundblaster LIVE! ct4780 + kxaudio - sony home theatre surround
Power Supply winpower 650w, system draws around 470-500w under load(+all screens)
Software win7 64bit
Benchmark Scores ~16m trips/sec using mty trip generator. triple monitor gaming using SoftTH. 3840x1024
#12
iv been wanting to know whats inside this one,
been thinking of modding it and filling with water, might try it if i get a new hs
 
Joined
Apr 2, 2007
Messages
2,807 (0.71/day)
Likes
230
Location
US
Processor Intel Q9400
Motherboard asus p5q-pro
Cooling Ultra120
Memory 6GB ddr2
Video Card(s) NVS 290
Storage 3TB + 1.5TB
Display(s) Samsung F2380
Case Silverstone Fortress FT02B
Audio Device(s) Creative X-Fi
Power Supply 750W PC P&C
Software win 7 ultimate 64bit
#13
lol, i bet you will just make it much less efficient
but if you are willing to take a risk, the go ahead, the tell us the result :D
 
Joined
Jan 27, 2007
Messages
3,962 (0.99/day)
Likes
184
Location
Severn, MD, USA.
Processor C2D T7200@2 ghz vcore: .9875
Motherboard generic laptop board
Cooling fan control and antec notebook cooler
Memory 2 GBs@ 533 mhz ddr2
Video Card(s) x1400 mobile, overclocked: 526mhz core/ 882mhz ddr
Storage 120 GB@ 5400 rpm fujitsu
Display(s) 15.4" 1440x900
Audio Device(s) integrated
Software vista 32 bit home premium
#14
It's what Poge said...mini phase change within a pipe. Carries the hot to cold, then the liquid condenses back to hot and etc. I don't think your supposed to feel it on the outside...because if you do that means it's not quite carrying the heat the way it's suppose to but dumping some on the outside of the heatpipe. I think...
 

Chewy

New Member
Joined
Jul 9, 2006
Messages
3,287 (0.78/day)
Likes
147
Location
Halifax, Canada
Processor Q6600 G0 @ 3.2Ghz
Motherboard Asus p5k-Premium/Black Pearl
Cooling Luna Block, 240mm rad
Memory Patriot Extreme PC2-6400 2x2GB
Video Card(s) Saphire 5850 1GB
Storage 60GB SSD + 2x500GB/1TB/2TB
Display(s) Samsung 226BW and 50" Panasonic S2
Case Silverstone TJ-09
Audio Device(s) X-fi Prelude
Power Supply Enermax Galaxy Dxx 850watt
Software Windows7 32Bit
Benchmark Scores Super Pi 1M 14.333
#15
yeah the water woould just reach its point.. the guy who opened his added it to his water cooling loop so it had constant cooler water flowing through the pipes... it actually worked good! he used s zalman 9500.
 
Joined
Apr 2, 2007
Messages
2,807 (0.71/day)
Likes
230
Location
US
Processor Intel Q9400
Motherboard asus p5q-pro
Cooling Ultra120
Memory 6GB ddr2
Video Card(s) NVS 290
Storage 3TB + 1.5TB
Display(s) Samsung F2380
Case Silverstone Fortress FT02B
Audio Device(s) Creative X-Fi
Power Supply 750W PC P&C
Software win 7 ultimate 64bit
#16
I saw Ninja cooler ready for water cooling, it was on the show or something