View Full Version : Heat-pipe temperature loss on long distances
Topuz
10-09-2005, 01:35 AM
Hi, guys. This my first Thread on XS, but I definitely think that it´s not crap. The thing I want to know is how much heat pipes lose temperature they are carrying on long distances. For example, if I have a heat pipe 40cm long (dont´ask :D ), what would be the temperature difference between the begining of the pipe that is nearest to heat source and on the end of the pipe? I ask this because I made a drawing of an air cooler, but it has 6 or 4 heatpipes, each 43cm long. So, what are your opinions or expiriences?
mrapples
10-09-2005, 01:48 AM
is this just a plain heatpipe? no fins, no fans, etc?
An heat pipe is designed to transfer heat, by itself it doesn't dissipate much energy. If you want to calculate the amount anyway, then you will have to consider many variables: the material used, the internal fluid, the lenght of the pipe, its orientation, how many bends it has etc etc....... It's impossible to make a guess.
Topuz
10-09-2005, 02:34 AM
The thing that I drew is Thermaltake Big Typhoon, but with two times larger dissipation area. I am not at home right now, but ill post some pics when I come back.
Mrapples, its just a design right now, but youll see in the afternoon what I mean.
Topuz
10-09-2005, 05:07 AM
As I promissed, here is my design...
http://img86.imageshack.us/img86/8912/doubleforce2eu.jpg (http://imageshack.us)
cartmanea
10-09-2005, 11:25 AM
Pic doesn't work, please fix link. As far as temperature loss, check some heatpipe manufacturer's websites for that info, they have it posted.
Topuz
10-09-2005, 12:08 PM
Hope it´s OK now.
cartmanea
10-09-2005, 12:12 PM
That would be an awefully tall/heavy design, lots of torque on the socket.
AKURA
10-09-2005, 01:02 PM
Hope it´s OK now.
I like your design..How bout maybe another 120mm ontop of those fins there. :)
Topuz
10-09-2005, 01:10 PM
I did some measuring, but it seems that it wouldnt fit in most cases with another 120mm fan. Without it, it fits without any problems.
I think that this design is good because all the heatpipes are set horizontally, and has very large dissipation area, and spacers between fan and heatsink. Also, by my calculations, it has about 1.7X larger dissipation area than Sonic Tower :D. BTW, the red line shows the heatpipe, because the drawing has a mistake, the heat pipe makes the big S.
Any more comments about the design?
The only problem is very simple. It doesnt egzist.
But who knows, maybe some company will see this :D
l3ored
10-29-2005, 03:40 PM
you sound like you're concerned that the heat will dissipate out of the heatpipe before hitting the fins? that wouldnt happen with the heat of a processor, if it did, it wouldnt be a problem, and theres no way you can build this yourself (if thats what you're talking about doing).
craig588
10-29-2005, 04:57 PM
That would be an awefully tall/heavy design, lots of torque on the socket.
There was a discussion on this earlier. We commonly put 20-30LBs of torque onto screws that go through the mobo, probably more, the weight of a heatsink is insignifigant compared to that. The only time a tall heatsink would be a problem would be if you dropped the case, and that's not something that should ever happen.
afireinside
10-29-2005, 05:05 PM
Isn't AMD spec like 75lb of pressure? I have to be exceeding that if I can warp my board so much that it won't power on :D
that fan would be a :banana::banana::banana::banana::banana: to swap out
Topuz
10-31-2005, 02:38 AM
you sound like you're concerned that the heat will dissipate out of the heatpipe before hitting the fins? that wouldnt happen with the heat of a processor, if it did, it wouldnt be a problem, and theres no way you can build this yourself (if thats what you're talking about doing).
No, I was cocncerned that the heat pipes will cool down before getting to the second row of aluminium fins. I know I cant build this myself, but imagination is not forbidden, right ;) ?
Entity_Razer
10-31-2005, 03:21 AM
you CAN build this yourself, heatpipes are for sale just out in the open (well you have to mass order so like 100 or 200 pipes per purchase but hey...) but the problem lies in soldering the fins to the pipes not to mention bend the pipes since this is especially difficult without the appropriate apparature
Topuz
10-31-2005, 03:44 AM
OK, it is possible to build it. But, I, personally, have no money, time and purpose to build this thing. But, as i said, maybe some people from thermaltake are looking at this for their Big Typhoon 2.
Entity, do you think it would perform well?
Entity_Razer
10-31-2005, 03:53 AM
yes and no.
The extra heatpipes carry away a lot more heat, but thanks to the shrinking of die's and CPU manufacturers who are finally getting the fact that heat is not a good thing I don't think it will make temps drop like hell. what I do think is, for servers or other heavy duty rigs who still put out a lot of heat this WILL make a difference. So for Pentium D's because their output in heat is still very high and on such a proc the added heatpipes will show their effect I reckon, but on like a AMD 64 from this time (no X2) you won't see a huge drop in temps i reckon. Maybe like 2 °C thats all. On like Pentium D's as I said I reckon you'd have a better drop in temperature, but only if you install a good 120mm fan with a good flow and airpressure to pull/push enough air past those fins
l3ored
11-02-2005, 07:44 PM
No, I was cocncerned that the heat pipes will cool down before getting to the second row of aluminium fins. I know I cant build this myself, but imagination is not forbidden, right ;) ?
so heat goes from the processor into the heatpipes and dissipates into the air from there without hitting the fins? not a problem unless you're trying to build a footwarmer.
About the fan... Delta anyone? :D
Topuz
11-05-2005, 02:17 AM
so heat goes from the processor into the heatpipes and dissipates into the air from there without hitting the fins? not a problem unless you're trying to build a footwarmer.
You didnt understand me. I am not worried that pipes would cool down without fins :rolleyes: . As I said, look at the pic and you´ll understand what I am trying to say. I am worried that the whole upper row of fins that cover the fan would be pointless, that the pipes would cool sown before hitting the second row of fins above the fan.
l3ored
11-05-2005, 02:26 PM
oh, ok. well at any rate, the heat from the top rack of fins would be pushed through the fins of the bottom rack (if the fan blows down), so the design isnt all that great in that aspect. also, this doesnt have much more surface area than a regular tower cooler. just imagine a TT on it's side with longer heatpipes. now what if the second layer was next to the top (imagine 2 xp 120's next to eachother) with 2 fans? it would have the same surface area as your design, or the tower designs, but with more fresh air. it would probably have to be a Y shape to fit. that would give you the same performance as water cooling.
Topuz
11-06-2005, 01:59 AM
Could you draw that. I really cant imagine how would that fit in any case.
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