Electronics tutorial - HEAT PIPES

#111 In this video I look at quite a common component of modern high performance heat dissipation technology - the heat pipe. I look at the reasoning and functionality behind it and then turn to some experiments to highlight how it works and what are its limitations.
More on the constant voltage load:
• Thermal Electronics Tu...
Further reading:
www.wakefield-vette.com/Portal...
www.1-act.com/water-heat-pipe...
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[@R2AUK]

I very much appreciate the educational nature of your videos without any ads and selling stuff. This is a rare thing on TH-cam, thanks!

[@reik2006]

Exactly the video I was looking for. Thank you!

[@yetadr]

Thanks for the video!
I would add that gravity can improve the Qmax (maximum transmission power) parameter of the heat pipe. If the heat source is below the heatsink, gravity helps the liquid return to the evaporator.
There are also heat pipes with a special wick structure inside that are less affected by gravity.
The heat pipe is good because it can't just transfer heat to the far heatsink, it helps to use a large heatsink more efficiently, because the heat pipe in this application can be used to distribute heat over the radiator surface.

[@priyanshukumawat4142]

as always again an amazing lecture . greetings from INDIA!!!

[@lachlanc.3509]

Your channel is awesome

[@Yankee14ed]

For the past month or so, I noticed that I tend to watch your videos after work when I sit down to eat dinner, or on the weekend when I take a break and am eating a snack. So, I guess I'll start leaving regular comments about the video, and/or what I'm eating. Why not?
Thanks for making a video on this topic. I especially liked the heat transfer representation as a circuit. At work, we are going to be starting a high speed/high resolution image capture and processing project sometime in the next 3 months, so I'm sure this video will come in handy later.
All-beef hotdog on toasted bun, with grey poupon, mayonnaise, peanut butter, and frank's hot sauce. And a pile of diced onions on top of it all.

[@FesZElectronics]

That just sounds delicious! everything except the hot sauce, I personally don't really eat spicy...
I'm happy you enjoyed the video!

[@lis0x90d]

Great explanation, as always. Thank you for your work!

[@FesZElectronics]

I'm happy you enjoyed it! Thank you!

[@philippeversailles2170]

I'm discovering this subject. Great explanation. Thanks

[@piconano]

Did you try the experiment the other way around, when the heat sink would be on top?

[@alifeleparanj3688]

Very nice!

[@felixcat4346]

Thanks.

[@axk1]

thanks! thought these were just solid bars of copper.

[@AfdhalAtiffTan]

Could you make a video on Panasonic PGS?

[@PetreRodan]

interesting measurements. I wonder if the fluid ends up leaking out after a few decades.

[@FesZElectronics]

As long as the heat pipe is sealed properly that should not happen. As a side node, while I was soldering the transistor to the pipe, it got so hot it went from a rectangle section to a circle section from the intense pressure building up inside, but it did not burst open, so I guess the sealing is done properly.

[@Gengh13]

If anyone want to see how they are manufactured I can recommend the video from Gamers Nexus.

[@piconano]

I always assumed the liquid inside was some sort of alcohol!
It's just water! Silly me!

[@FesZElectronics]

The nice thing about water is that is can vaporize in a very wide temperature range depending on pressure, so its sufficient in the temperature range in which normal electronics usually work. I've read that in more exotic heat pipes used in aerospace applications you can have ammonia but I haven't found anything about alcohol.

[@piconano]

@@FesZElectronics I never read anywhere about alcohol as the liquid inside. I only assumed. Ammonia would also make sense for extreme temperature applications.

[@maxmustermann5353]

@@piconano different liquids are used for heatpipes. Water has the advantage of a very big energy transfer on phase change. But if your application requires low temperature performance, you can use mixtures of other fluids. The "drinking bird" is an example of a heatpipe which doesn't use water.

[@Mr.Leeroy]

It is probably a very clean water.