Heat Pipe Basics and Demonstration on How a Heat Pipe Works
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- เผยแพร่เมื่อ 20 ม.ค. 2021
- Heat Pipes are one of the most efficient ways to move heat, or thermal energy, from one point to another. These two-phase systems are typically used to cool areas or materials, even in outer space. Heat pipes were first developed for use by Los Alamos National Laboratory to supply heat to and remove waste heat from energy conversion systems.
Today, heat pipes are used in a variety of cooling applications from space to medical devices and power electronics cooling to aircraft and more! If you’re unsure if heat pipes are an ideal thermal solution for your project, contact us to discuss your application and our engineers can determine the best path forward.
ACT designs and manufactures custom heat pipes and heat pipe assemblies for a wide range of markets. Heat pipes are not only for terrestrial use but they are used in spacecraft thermal control as well. ACT manufactures different types of heat pipes for both applications with spaceflight heritage for the CCHP (constant conductance heat pipes) product line for spacecraft thermal control uses as well as SCWHP (space copper water heat pipes). ACT currently has over 50 million hours of spaceflight heritage for the CCHP line.
Learn more about heat pipes:
www.1-act.com/thermal-solutio...
Heat Pipe Resources:
www.1-act.com/resources/learn...
Contact us for more information about custom heat pipes or heat pipe assemblies. solutions@1-act.com or call 717-295-6061 to get the conversation started! Learn more about our territory sales engineers/managers here: www.1-act.com/contact-act/ - วิทยาศาสตร์และเทคโนโลยี
That was an amazing visual explanation, thank you.
So glad you found it helpful. Please also check out our Heat Pipe FAQ on our website for more helpful visuals and information: www.1-act.com/resources/learning-center/heat-pipes/#hp-faq
Great video. I finally know how the heat from my PC processor is being transferred to the heatsink.
We're glad you liked it and that you learned something!
SUPERB presentation!
Great video, and right to the point
Nice presentation!
Love the example
wow that's a nice update of the old video, thanks !
Glad you liked it!
Ligga
Amazing host fast it is 😳
"A heat pipe is compromised" I think you mean *comprised.*
Totally should be comprised! The next time we get this heat pipe basics video updated, we will get it right!
my meat pipe is compromised GIGGITY
That is what happens when someone "reads" something they have no knowledge of.
It appears that the speaker was compromised
Copper rod vs heat pipe - interesting!
Nice to see how designed heat pipes in early 1970. especially these with a passive system designed to freez a tank of water that can make large amounts of ice with no utility to accomodate the entire cooling load to constructions especially compared with copper rod because of the tank made of reinforced concrete and insulated of polystystren. How heat is passivly carried from the water to atmosphere we see nowdays.
Shematic approach is so clearly explained as well as structure that provides effective workout!
We're so glad you enjoyed the video and found it educational. Check out our other videos or browse our website to learn more. We've got a great learning section on heat pipes! www.1-act.com/resources/learning-center/heat-pipes/
Love it
THAT IS SUPER COOL
The color-changing paint demonstration almost looks fake, the heat pipe changed so fast.
The color change is temperature-dependent, so it won't surprise you that we have to be careful not to set the heater in our demo unit too high or it makes getting the heat pipe out difficult.
And the dude just grabbed it without gloves
@@patjustpat8178 They never stated how hot it was, just hotter and colder. The red in the hot well is illumination, not that it is red hot. This is why they use thermal paint for the demo.
@@gabrielsierra6890 if i recall, you could get straws that did it...cups. didnt coke or redbull do a limited edition of cans?
Great video and perfect graphics' One point with "heat-pipe" over other types is the ease in "cleaning" the pipes at regular maintenance intervals as the "heat wheel" is more complex and if it get's "torn" or "ripped" the heat-wheel and Energy Recover is completely gone' and not to mention the cost of replacing a heat-wheel. Those heat-pipe will last a long time. And thanx for sharing.
Very true! Heat Pipe Heat Exchangers (in HVAC applications) are a great alternative to Energy Wheels when considering maintenance needs.
@@AdvancedCoolingTech Is there any chance that the heat-pipe could be in the "smaller" residential ERV/HRV units? Or is there such a thing?
@@AdvancedCoolingTech but then what pipe do you use to maintain the temperature of heat to another compartment.
@@fauzan5919 Heat pipes will transfer heat very effectively. Our HighTemperature (alkali metal) Heat Pipes are used for temperature calibration and hold very tight temperature tolerances, of about .1 degrees Celcius.
The difference from the common use is that this would not be connected to a heat sink that is trying to cool the evaporator end, but in your case would likely be attached to a heating element.
😊😊😊😊😊😊😊
Are all heat pipes made like this? I had a mild epiphany seizure when I saw this. It's neat af and great visual demonstrations.
Nice explanation)
Thanks! 😃
@@AdvancedCoolingTech are there limits to the length / sizes of heat pipe vs its functionality?
Great visualization and explanation, when will CPU cooler manufacturers start adding thermal paint like that as an option? I think that'd be very fun.
Good question! We only use the thermal paint to show heat transfer visually.
It would interfere with the transfer of the energy both into the device or out of it.
Thank You - I had some ideas around using this product but these are not easily available in India
Thanks for your comment- If you are able to send us more details relating to your project, we would be happy to take a look. You can fill out the form on our website: www.1-act.com/contact-act/
@@AdvancedCoolingTech Thanks for the response and sure will reach out to you to share my idea ../\..
0:14 why is the heat pipe compromised?
It may have visited that island
Hi, I have a question. What do you think about heat pipes in PC air cooling system that they design to let the condenser to be below the evaporator? I think it would affect its heat dissipation efficiency, but how much would you think it is? I think could be less than -5%... Or more and less? But such question can only be answered by experts as I don't have any reliable sources to reach such information myself, so your help is very much appreciated. Thank you! 😘
Heat pipes would be a great application for this! Heat pipes use capillary action, so they are able to move heat when the evaporator is above the condenser (against gravity), although they’re still able to carry more power when gravity-aided (evaporator below condenser). Depending on the heat load, there may be virtually no difference in thermal performance against gravity or gravity-aided, but the max heat able to be transferred is affected. You can gauge if heat pipes could work for a specific case using our online calculator here: www.1-act.com/resources/tools/heat-pipe-calculator/
I am wondering what happens when sub zero air is passed over a noctua cooler.
Will the wick structure freeze with liquid at the distal end?
How cold is to cold for a heat pipe to work?
This is a fantastic question, Stuart! Might I recommend a pen and paper? The answer to your question is rather in-depth. If the CPU is off during the period when sub-zero (°C) air is blown across the cooler, then the water inside the heat pipe will likely freeze. This isn’t a problem for well-made heat pipes, because the water is housed entirely in the wick structure, so the expansion of the water during freezing does not impact the envelope of the heat pipe. If the CPU is running and dissipating heat, then the air would likely need to be a lot colder to reduce the entire temperature of the system to below the freezing point.
A copper/water heat pipe (like the ones used on CPU coolers) has temperature-dependent performance and can dissipate a varying amount of power depending on what temperature the water inside the pipe is at. Of course, below freezing (0°C) the water is frozen and above the critical point (374°C) the water has poor thermophysical properties so you could expect some dependence on temperature. You may use the heat pipe calculator on our website to input your own data and view the temperature dependence of a heat pipe.
www.1-act.com/resources/heat-pipe-calculator/
Hope this helps and thank you for asking!
I recommend revisiting the statement about “extremely low temperature difference…”
Talk to me about graded sintered diamond heat transfer windows, and ionic acceleration of the vapour phase.
Hi Dougal, thanks for the comment. These two things are very specific technologies, not completely related to the heat pipe basics mentioned in this video. If you'd like to discuss these technologies and how ACT might help, please contact us directly. Our Chief Engineer of R&D, Bill Anderson, would be happy to discuss your questions!
What kind of induction heater is that and how can I get one, thanks a lot for the video
I notice the blue side is for cooling. Please can I know what machine that is
Hi, can you put steel wool inside a heat pipe
i heard it causes a exothermic reaction which makes a small heat make a larger heat
thanks for letting me ask
James
No, a heat pipe is a completely sealed tube where the fluid continually vaporizes at the part exposed to heat and condenses at the colder regions. Nothing can be put inside this sealed tube.
Steel wool is not used inside of a heat pipes because it’s typically comprised of low-grade carbon steel which would react over time. Stainless steel wicks have been used for heat pipes and is compatible with several commonly used fluids.
@@AdvancedCoolingTech what are commonly used fluids? What factors determine the efficiency in the application of heat pipes, such as latent heat of vaporization, boiling points?
Is water more efficient in heat transfer but more corrosive than something like acetone, which seems to be commonly used?
@@sadfur8728 it literally says it is water.
@@NigelTolley A DIY setup may use water, but that's just a convenient substitute.
Hi, nice video..
Can the heat pipe running out of its liquid? Due to long term use
Thx..
No, a heat pipe is completely sealed, so there is no potential loss of fluid. Heat Pipes are a great passive option that provide a long life for your cooling system!
@@AdvancedCoolingTech Nice to know! Thank you! 👍🏻
Waiting for these to replace radiators in cars
I have a question. What if it's upside down and the source of the heat is on the top of the pipe and the colder region of the pipe is at bottom. Would the heat transfer be as fast if the heat source is at the bottom and the colder region is at the top? I hope anyone can answer. I ask this because I want to know if gravity and evaporation has a role in the orientation of the pipe and if it will be as efficient base on orientation
The orientation of the pipe will impact the transport power capacity (i.e. how many watts of heat it can move from evaporator to condenser); it will be capable of transferring less heat when opposing gravity. If it's designed correctly and capable of transferrin the amount of heat required, there will not be a large impact on the efficiency when operating against gravity. If you'd like to discuss your project, send an email to get started: solutions@1-act.com
What do you use them for? or How do you use them?
Great question! We've got an extensive Heat Pipe Learning Center on our website that can answer this, and many other questions about our heat pipes. Check it out here: www.1-act.com/resources/learning-center/heat-pipes/
🤯
Narrator read "comprised" as "compromised"
How long can a heat pipe be
Thanks for letting me ask
A heat pipe working against gravity (with the condenser below the evaporator region) maxes out between 10-12". In the reverse orientation, you can expect a a few feet to work well, but at some point it is about the practicality of manufacturing them (thin long pipes can easily bend, which can compromise the wick structure.
@@AdvancedCoolingTech what if heat source and drain are both at the same level? (Example: campfire to interior of tent)
Heat pipes is "compromised" shouldn't it be "comprised" ?
Totally should be! A re-recording was not in the cards.
@@AdvancedCoolingTech on the cards.......
Yo how do I make one
For 15 years I've been trying to understand heat pipes and I just can't. What causes the vapor to move from the hot area to the cool area? And then when it condenses, what causes it to move the other way?
Heat Pipes exist in a two-phase state at all times. When heat is applied to any area of a heat pipe, the liquid portion evaporates in this area and this process displaces the vapor that is everywhere else in the heat pipe. Because the evaporation removed some of the fluid from the wick, the capillary forces of the wick pumps liquid from the condenser area back to the evaporator section.
@@AdvancedCoolingTech thanks, that makes sense!! Finally I get it
Further, the high temperature vapour/gas molecules rapidly move towards the cold end, heating it up, before cooling down again. And gas molecules move really fast!
How long can they be
Earthbound heat pipes that work against gravity are relatively short - typically, a maximum of roughly 2 feet (60 cm) long, and a maximum elevation against gravity of roughly one foot (30 cm).
Spacecraft heat pipes are usually under 10 feet (3 m) long, and the extra length is allowed because they operate in zero gravity.
When a heat pipe works with gravity, called a thermosyphon, the length can be virtually unlimited, and you’ll find many in lengths up to hundreds of feet (m).
For more FAQ info: www.1-act.com/innovations/heat-pipes/
@@AdvancedCoolingTech Oooooooooooooo, delicious.
Delicous information mmmm.
Thank you thank you so much!!
Now how small can we make them?
I'm thinking we need an upgrade to thermal electric generators and its feeling like heat pipes might be that solution
@Kair Hatchet
ACT manufactures copper/water heat pipes from the following standard tube sizes (outside diameters) which are readily available:
3, 4, 5, 6 and 8 mm
1/8, 1/4, 3/8 and 1/2 inch
ACT can also create custom heat pipes outside of these diameters.
I don't see any mention of the need for heat pipes to be "tuned" to the conditions under which they will operate, like the need to adjust internal pressure to match the expected temperature difference where the heat pipe will be used ( one size does NOT fit all ).
Hi Gregory, you are correct. This is a heat pipe basics video, and as such doesn't go into minute detail on our heat pipe design process. ACT recognizes the importance of tuning the heat pipe parameters to each application. We go into more detail about our heat pipes on our Heat Pipe Learning Center page, www.1-act.com/resources/learning-center/heat-pipes/. As always, please feel free to contact ACT directly to discuss your heat pipe questions!
кто от Ноутбукера Лайк))
So basically uses the same principle of the air conditioner system.
"the heat pipe can work on adverse orientation"
You meant inverse.
ah! interesting grammar comment. We use adverse because it is not only the opposite direction but actually working opposed to gravity (working in an opposing direction is one of the definitions of adverse).
@@AdvancedCoolingTech working against something. However while that definition correct the way you said it is still inverse. The opposite orientation.
Где русские субтитры?
Кто от Ноутбукера - лайк :-)
Заходишь в настройки и выбираешь субтитры перевести на русский!!?
0:08 you need to add an apostrophe to the word "fluids" since it is possessive. TH-cam has no standards...
this just adds more confusion I think.
Is there anything we can clarify for you?
@@AdvancedCoolingTech i.e. Why do you need a capillary material inside? Why doesn't the water just run back down to the heated area? Just saying it happens doesn't explain much to me, it just begs more questions. Obviously I am no physics wiz...
Thanks
@@gerrys6265 Thanks for the question! The capillary wick enhances return to the evaporator end against the vapor flow, and also provides a return path when the heat pipe is oriented so that the liquid is returning against gravity---think how water travels through a paper towel against gravity! Hope that helps make it clear.
0:10 caption “high lead heat” voiceover “high latent heat”. WTF? It’s hard to trust a video with no quality control.
@neilbrewitt, thank you for pointing out the error. Sub titles are auto-generated by TH-cam. The error has been fixed.
I was always told that heat pipes are gimmick they don't have Perpetual cooling of liquid to Vapor & Vapor to liquid. And look for yourself looks like they're working to me. But then again they said that about everything Horseless Carriage LOL
I believe that the actual cooling is achieved by the heatsink and fan that the heat pipes are normally attached (and transfer the heat) to.