Відео

Thanks, we're glad you enjoyed our content! Don't forget to stop by our website to learn more! www.1-act.com/thermal-solutions/active/pumped-two-phase/

Hey there, great question! The heat loads from solar flux can be easily be handled by pumped-two phase systems and would be accounted for during the design phase in the sizing of the components. If you have a particular concern about solar heat flux for an application you are working on, please reach out, we would be happy to assist you! www.1-act.com/contact-act/

Hi Akhilesh! Check out our website for more information, specifically this page: www.1-act.com/thermal-solutions/passive/heat-pipes/pulsating/ Also, feel free to contact us directly to chat! www.1-act.com/contact-act/

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

Hi, The frequency of oscillation within a PHP can widely vary and is dependent upon many factors such as working fluid, channel diameter, fill ratio, number of turns, power, and temperatures. It can generally be said that the higher the oscillation frequency, the better the heat transfer properties of the PHP. However, the oscillation tends to be more chaotic in nature, and thus is difficult to define without complex modeling or simulations.

We're glad you liked it and that you learned something!

That's an interesting approach. It might make sense to integrate PCM, however, in water tank thermal storage systems, the water is used in a similar fashion as the PCM would be used, in most PCM thermal storage applications. Please reach out to solutions@1-ACT.com and provide more details on the thermal storage requirements, heat source, tank size and ambient conditions and we'd be happy to review and see if the application could benefit from a PCM solution.

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/

Thanks for watching! We're glad you found it helpful. Feel free to reach out to our engineers if you've got a project that we could help with! www.1-act.com/contact-act/

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!

Hi there, thanks for the comment. We actually cover that topic in this whitepaper: www.1-act.com/wp-content/uploads/2023/05/Copper-Water-and-Hybrid-Aluminum-Ammonia-HP.pdf. Let us know if you have any further questions by dropping us a line on our website!

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!

I recommend you use our heat pipe calculator tool, www.1-act.com/resources/tools/heat-pipe-calculator/

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/

Great question! Yes. Heat pipes are processed under vacuum, so the fluid will operate along its saturation curve. Water would be in two-phase and able to boil at 25 C.

Absolutely! Thank you for taking the time to watch and learn more about our heat pipes! Visit our website for more information, we have an entire learning center dedicated to them! www.1-act.com/resources/learning-center/heat-pipes/

Hey there, great question! Yes, it’s a typical use case for heat pipes to isothermalize a surface. The temperature range would be a function of the fluid and 400 C is out of normal operating range for most common working fluids. ACT would be the best fit to solve this challenge though. If you have more details you can provide on the application please email them to solutions@1-act.com

@@AdvancedCoolingTech Hi Thanks for the reply. I have no real life application for the heat pipes yet at moment, but your video provided a very interesting insight to what might be possible. Will save your video link for future requirements. By the way what would the typical temperature limit be like?

@@Schroeder9999 Great question. This section of our Heat Pipe 101 covers Merit Number, which gives ranges for various working fluids: www.1-act.com/thermal-solutions/passive/heat-pipes/heat-pipes-101/#jumpTo__h3-selecting-a-heat-pipe-working

If you have a system generating a constant amount of heat in a constant environment that you want to keep at a constant temperature, you’ll need to expel the same amount of heat somewhere! I love waste heat conversion aesthetically, but the temperature difference between the hottest circuit board on a spacecraft and the coldest radiator isn’t very large, so the Carnot efficiency would be quite low. Reducing the radiator temperature improves the temperature difference but increases the radiator size (and mass) substantially. But when it’s possible to raise the source temperature significantly (in a plutonium RTG, for example), then extracting work from the waste heat does become feasible. The other way to reuse waste heat is to displace it before expelling it, either by transporting it to a part of the spacecraft that’s simultaneously too cold or storing it for later use in a colder environment. Hope this helps! Thanks for checking us out!

@@AdvancedCoolingTech I had not considered how minor the temperature gradients would be. That makes total sense now. 👍

@@thetruth45678 Glad we could help! Feel free to drop us a line on our website if you have more inquiries - www.1-act.com/contact-act/

The melt and freeze temperature for most PCM is identical (or very close), so the PCM will provide cooling when the device is generating heat. Once the heat is removed, it will take time for the PCM to resolidify, which will keep the device near the melt temperature. We hope this helps! If you'd like more information, visit our PCM learning center: www.1-act.com/resources/learning-center/phase-change-material/

@@AdvancedCoolingTech hey, it's not about only maintaining right!..what happened the battery temperature or sink temperature below the melting point, the pcm get solidify by exothermic reaction and it heatup the sink or battery again right

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/

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.

Gravity does not detrimentally affect this system, and changing the spatial orientation has minimal effects on performance. In the example shown, the single cold plate provides cooling to both the bottom side and top side of two parallel plates. This is due in part to the wick structure, which draws liquid directly to the heat source. In this way, it is possible to have the circuit board up and visible with integrated cooling provided beneath.

If you are referring to a type of heat spreader application, then a PHP would be ideal. Heat pipes will also work but a PHP has a much thinner profile (lower mass), can be additively manufactured with complex conformal geometry, and excels in heat spreading applications.

Ideally PHPs can operate gravity independently, but it’s been found they sometimes perform more favorably in a gravity aided orientations. The percent at which performance increases depends on multiple factors and isn’t necessarily consistent across all applications. However, it is typically a smaller margin of improvement on the order of less than 15%.