Heat Pipe Overview and Explanation
ฝัง
- เผยแพร่เมื่อ 2 ส.ค. 2024
- What are Heat pipes?
Heat pipes are a type of cooling with a large heat flux transport capability.
Heat Pipes consist of an evaporator, an adiabatic section, and a condenser section. Various working fluids are used to transport the heat energy. Generally, the type of fluid determines the heat transport capability. Finally, a heat pipe includes a wick, the working fluid is returned from the condenser to the evaporator via capillary action through a heat pipes wick.
Types of Wicks in a Heat Pipe
Homogenous wicks are constructed of one type of material or machining technique.
Examples include wrapped screen. Sintered powdered metals and Axial groove and many others. Advanced Thermal Solutions off the shelf heat pipes uses both sintered powdered metal and grooved wicks because they're cost-effective and provide high thermal conductivity. Advanced Thermal Solutions sintered powdered metal heat pipes give an added advantage of handling high heat fluxes and deployment in any orientation even against gravity.Advanced Thermal Solutions design services can custom develop heat pipe solutions including homogenous and deposit wicks depending on the application.
For more information on our round and flat heat pipes go to www.qats.com.
www.qats.com
Advanced Thermal Solutions, Inc.
A leading-edge engineering and manufacturing company focused on the thermal management of electronics.
Service, Products and Training
• Cooling Solutions - From Chip to System
• Mechanical Packaging and Design
• Design Services
• Air and Liquid Cooling Solutions
• Rapid Prototyping
• Custom Heat Sink Design
• Research Grade Thermal Instruments
• Engineering Training
• State-of-the-art Experimental Laboratories
• Qpedia Thermal eMagazine - วิทยาศาสตร์และเทคโนโลยี
![เจ้าผู้เดียว - ดิด คิตตี้ [OFFICIAL MV]](http://i.ytimg.com/vi/q0NLCYKBOTo/mqdefault.jpg)
This is exactly what I want, thank you.
Totally irrelevant: The "S" on your building is mounted upside down.
Thanks Bjorn. We didn't believe till we looked really closely ourselves!
It's an artistic decision I can appreciate.
well technically it's not upside down, it's rotated 180 degrees
@@repawnd1 so it's upside down
Holy cow your right lol
ARE this heat pipe good for use in solar vakuum tubes? Do you deliver for that purpose
Do you have termo electric solutions Peltiel element power prodution. I whant to run my Heatpump av from the cop of the heatpump using the extrakted heat. So i need a good termo exanger in combination to heat to el. power elements.
Is it possible to chain heat pipes? That is, to have one start near where another ends in order to effectively increase their length? (presuming you create good thermal conductivity between the two)
It’s certainly possible but definitely not a recommended way. We have heat pipes up to 600 mm in length www.digikey.com/products/en?pv98=3&FV=fff40012%2Cfff80068%2Cfffc02ac%2C2dc1e7e&pageSize= so no need to chain them!!
Just use longer heat pipes.
The animated diagram implies that the fluid leaves and returns entirely via the capillary wall. Doesn't it actually move down the empty center of the tube as a gas, and it only returns along the wall (as a liquid)?
You're right about the vapor flowing through the middle section. This was a quick overview and there is a more detailed explanation at www.qats.com/cms/2016/04/28/ultimate-heat-pipe-guide-selection-performance as well as in this video, th-cam.com/video/_5ZVrwTj9Jg/w-d-xo.html.
Advanced Thermal Solutions, Inc. please excuse my question, which may be stupid. I know that these pipes can be operated against gravity. After heat transfer and condensation, why doesn’t the capillary action distribute the fluid evenly along the wick, but actually directs it back to where most of the fluid is? I would even have expected the wick to drain the fluid reservoir!
Ha! I think I guessed it! There is never liquid outside the wick! The liquid evaporates from the wick! Correct?
did you take this soundtrack from roadkill
Hi, I would like to know if these can be bent, flattened without losing performance? of course this without invading the inside of the tube.
There is some loss to the Q_max due to bending but usually heat pipes are sized with enough margin that that’s not an issue. Flattening also creates a similar loss in Q-max; manufacturer’s datasheets (such as ATS datasheets) show separate Q-max values for flattened vs round heat pipes.
How do you attach these copper heat pipes to copper plates? Soldering or some kind of glue?
Soldered/bonded. There is some exceptions where you can use thermal glue instead of soldering.
Stefan's comment was right, although for quick prototyping work, we recommend thermal epoxy. such as the 3M TC-2810. For more robust and production-level assembly, low-temperature soldering techniques are recommended.
capillary pressure created by the menisci? "as long as the pressure is sufficient?...what then creates this pressure and how is it controlled?
is there a benefit into stacking heat pipes to help dissipate heat?
Using heat pipes in parallel increases the total heat capacity. Example, if you need to dissipate 300 W of heat with a heat pipes that have a 125 W Q-max, you can use 3 or them.
I think the animation is incorrect? Vapor should be coming from the middle right?
Think I’m gonna add a second one to my laptop it only has one atm and I’ve heard on my model of laptop they go bad and they no longer sell a replacement part for that PC just a few screens and batteries out there for it that’s I can’t even get a new fan for it unless I order from China and wait a month or so and they only had 9 left last time I looked it’s a discontinued item all the parts are
100% Tutorial.
how to bend the flat heatpipe
When bending flat heat pipes, we usually create bending mandrels with exactly the right groove size in them. This supports the pipe fully while we bend it around the mandrel.
For the minimum bend radius please see the guidelines at the end of our heat pipe datasheet. For flat heat pipes, take whichever dimension you are bending against. So if the cross section is, say, 6X3mm, and you are making a “flat” bend, then the minimum centerline bend radius would be 18mm. If you lay it flat on a surface and bend it upwards, then that radius would be 9mm.
How do you bend those flat ones?
If you click on the data sheet at www.qats.com/Products/Heat-Pipes, there is information about the minimum bend radius for different diameters of heat pipes. Also, keep in mind there is performance degradation with bending heat pipes that needs to be tested on a case-by-case basis.
I've seen the datasheet but it's not clear about the bending radius for FLAT heat pipes. Are those diameters for bending them in plane (for the flat ones)? Could you clear that for me? Thanks!!
The amount that you can bend a heat pipe is very dependent on how you bend it and the kind of
performance that’s needed. It is best to do the bending process and measure the results to see if it works. If you see cracks or diminished performance, increase the radius. A good starting point would be ¾” radius if you’re bending on the narrow side and 3/8” on the broad side.
"Off The Shelf"? 🤔
This company told me they don't have anything off the shelf. They told me anything I wanted would have to be "custom made" and take 3-6 months to develop. 😒
That doesn't sound "off the shelf" to me. 🤣
Umm - - because nothing is "ON" the shelf ??
Thanks for your comment @SciheartJourney. Without knowing the nature of your engineering need for thermal management it is hard to understand why you received such an answer. We do offer quite a few heat sinks "off the shelf" through our distributors without any customization.