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Pulsating Heat Pipes

This complex new technology has great potential for many applications.

With no moving parts, our solutions are extremely reliable and inherently maintenance free. Therefore they are ideal for reliability critical environments.

self regulating

Our systems simply operate when heat is applied, adjusting their performance depending on the amount of heat to dissipate. There is no control system to potentially breakdown or fail.

Ultra efficient

By vaporising a fluid our systems have the potential to be the most efficient form of heat transfer. For you this means the lowest thermal resistance.


PHPs are unique in their ability to operate against accelerations. This provides one of the only passive, two-phase solution to operate under such conditions.

100% passive

The beauty of two-phase is the ability to harness the latent heat of vaporisation, using it to power the cooling system is the most sustainable solution.

PULSATING heat pipes

how do they work?



When heat is applied to the pulsating heat pipe it causes liquid to vaporise and therefore vapour plugs inside the heat area expand.



As the vapour plugs expand it causes pressure instabilities in the heat area in turn causing the fluid inside to oscillate (or pulsate).



Due to a lower temperature the vapour condenses back into a liquid, expanding the liquid slugs inside the cold area.


Process Repetition

This expansion and contraction of the liquid and vapour inside causes repeated stochastic movement of the fluid maintaining the heat transfer.

PULSATING heat pipes

our strengths

Our ability to innovate is fundamental to our mission. Applying our world-leading two-phase knowledge and experience we design the best passive thermal management solutions.


Calyos has experience designing and developing these complex solutions. As this is a relatively new technology this knowledge is invaluable if you wish to deploy such a system.


Calyos typically use a safe, green, dielectric refrigerant r1233zd(E) as its Global Warming Potential is <1. Plus we have experience using other fluids as required for different applications.

system design

Our skillset is in customizing two-phase solutions to maximize the performance while making sure they are non-invasive and easy to adopt.

Let's Get Started

Schedule an introductory call with a Calyos heat pipe expert.

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