Request a free initial feasibility analysis to provide you with estimates for the thermal performance, mechanical design, and cost.

Calyos is a world renowned expert in two-phase cooling technologies.

This includes; loop heat pipes, pulsating heat pipes and micro-channel heat pipes. Our team makes applying these advanced technologies viable and feasible.

Trusted by leading, global companies across different markets

Sustainable Cooling For Your Industry

Thermal management is a critical requirement across many different market sectors.


Electrification is transforming the industry and is resulting in new vehicle architectures, from battery electric to hydrogen fuel cells. Regulating the temperature of components and systems with high-performance thermal management solutions is critical in extending the lifetime of a vehicle. Calyos provides solutions in all of these sectors:

  • Motorsport
  • Light Electric Vehicles
  • Commercial Vehicles
  • Off-Highway Vehicles
  • Aviation & Aeronautics
  • Rail
  • Marine
Learn more
Did you know?
12x more EVs are expected to be sold in 2030 vs 2020
This will drive the increased use of power electronics and battery systems. Cooling is critical for power efficiency and lifetime in both applications.


As the power consumption of processors continues to increase so is the need to evacuate the waste heat. Regulating the temperature of components and systems with high-performance thermal management solutions is critical to ensure components stay within safe operating temperatures. Calyos provides solutions in all of these sectors:

  • Silicon Providers
  • Server Suppliers
  • Data Center Operators
  • Data Center Integrators
  • Telco Equipment
  • Specialist Computers
Learn more
Did you know?
11x more data is estimated to be processed in 2030 vs 2020
This will drive the increased use of all kinds of different processors. Cooling is critical to maximize the components processing speed and efficiency.

Are you facing some of these challenges?

Engineers across different industries are facing similar challenges as they look to resolve each thermal problem they face.

Cost & Complexity

Long, complex lines and a complex array of connections and control valves.

Thermal Performance

New electronics are smaller and more powerful due to user demands.

Weight & Volume

Larger pumps and longer lines add weight and volume reducing efficiency.

Energy Consumption

Increased pump requirements due to additional pressure drop and increased flow rate.


Electronics now control all safety measures plus, water poses risk for short circuits.

Two-phase can solve these problems.

Calyos' two-phase cooling systems deliver viable, cost competitive solutions to the challenges engineers are facing.

Cost & Complexity

Self-regulating systems that require no controls, operating only when heat is applied.

Thermal Performance

Vaporization inherently has an extremely high heat transfer co-efficient.

Weight & Volume

Remove the need for pumps, connectors, valves and controls to save valuable space.

Energy Consumption

Two-phase is inherently passive, harnessing the latent heat of vaporization.


Dielectric fluid and self-regulation removes the risk of short-circuits and failure.

Two-Phase Technologies

Our team consists of experts in all things two-phase, who design and produce cooling systems using the following technologies.

Heat Pipes

Traditional HPs are beautifully simple and provide incredibly low thermal resistances.

Learn MoreHeat Pipes

Loop Heat Pipes

LHPs provide the ability to not only handle very high heat flux, but also to transport heat over long distances.

Learn MoreLoop Heat Pipes

Micro Channel Heat Pipes

MCHPs are a hybrid HP-PHP solution that remains a simple and lightweight ultra-efficient cooling solution.

Learn MoreMicro Channel Heat Pipes

Pulsating Heat Pipes

Also referred to as Oscillating Heat Pipes, Calyos is working hard to mature this newer technology.

Learn MorePulsating Heat Pipes

General Comparison

Ever increasing thermal requirements are forcing engineers to consider new technologies. Advanced heat pipes are the only solution that is capable of handling higher performance demands without sacrificing on lifetime, maintenance and safety.



Use & TCO



High power components

Low thermal resistance

>10 year lifetime


No safety or fire risk

No risk of short-circuits

Passive transport of heat

Heat recovery capability

Heat Pipes

Common Applications

Regardless of the market, the same applications have ever-increasing cooling requirements.


Advancements in battery chemistry combined with demanding user needs such as fast charging are resulting in battery packs becoming increasingly difficult to thermally manage.

Learn More

Electronic Components

New technologies and packaging requirements are resulting in smaller and smaller electronics that produce more and more heat.

Learn More

Embedded Processors

As vehicles become software defined processors designed for data centers are now required in harsher environments such as defence, aeronautics and passenger vehicles.

Learn More

Personal Computers

Computers are well established as critical tools to enable modern-day work, they must be ultra-reliable with zero-maintenance and traditional cooling methods have reached their limits.

Learn More

Power Electronics

Advancements in nano-technology (including GaN & SiC) are creating components with ever increasing heat density, combine this with the need to reduce packaging weight and volume and power electronics are increasingly difficult to thermally manage.

Learn More


Advancements in nanometer lithography combined with demanding workloads from AI are resulting in computer processors that are producing more waste heat at an increased density.

Learn More

Why Two-Phase?

Calyos believes in two-phase cooling because this technology brings a clear set of benefits to our customers

No Water

Read More

Calyos specializes in using a dielectric, green refrigerant, removing the risk of short-circuits in the event of damage.

No Maintenance

Read More

Our products are helium tested for tightness before they leave our factory, ensuring long lifetimes and zero maintenance.

100% Passive

Read More

All of our two-phase technologies harness the waste heat to vaporize a fluid, using the problem to power the solution.

No Pumps

Read More

By being 100% passive and having no pumps it removes the most common point of failure in liquid cooling systems.

High Performance

Read More

Vaporizing a fluid is an incredibly efficient and results in systems with extremely low thermal resistances.

Calyos makes applying these two-phase technologies feasible.

By working side by side with our clients, Calyos can pair our knowledge and experience with our clients understanding of their application. This allows us to continue to develop innovative cooling systems that are viable in terms of mechanical design, cost and thermal performance for real-world applications.

Two-Phase Physics

Our experts enable us to produce
proprietary wick structures that maximize capillary pumping. We meticulously select fluids and fine-tune vaporization and condensation processes to deliver exceptional performance that Calyos is globally recognized for.

Modelling & Simulation

Calyos' advanced modelling capabilities integrate physics-based simulations with complex models derived from empirical test data. Two-phase modelling is not easy and this crucially ensures accuracy balancing theoretical precision and real-world validation.

System Design

Calyos' patents and exclusive know-how enable robust designs, that easily mechanically integrate with your application while remaining cost effective to manufacture, assemble, fill with fluid and install.


In combination with our own facility and testing laboratory, Calyos has relationships with industrial partners in different regions and for different markets to meet the mass production needs for our clients.

Our Latest News

Olivier de Laet Speaks at CTI Symposium USA 2024



May 15, 2024

read more

Calyos founder presents at Semi-Therm conference



March 26, 2024

read more

Calyos CTO presents at European Workshop on Pulsating Heat Pipes



February 22, 2024

read more

Why is thermal management important?

Thermal challenges used to be resolved easily with a simple, solid heat sink. Fast forward to today and we have exhausted the design possibilities of traditional heat sinks. As electronic technology reduces in size it increases in heat density requiring more and more powerful thermal systems to dissipate this heat. With the rapid and continuing rise of electrification and data processing, thermal management of electronics faces rapid demands. In combination with the demand for sustainable, environmentally friendly solutions Calyos is in a unique position offering 100% passive thermal solutions in a market of pumped liquid cooling.

Component Reliabiltiy

Thermal management is the most critical reliability factor for electronic components. A good thermal system extends the lifetime and increases the performance of both processors and power electronics.

Minimize Charging Times

Both power electronics and battery cooling are critical to the speed and efficiency of a vehicles charging time. Cooling affects both components inside the vehicle and the charging infrastructure itself.

Waste Heat Recovery

Waste heat from data centers is typically released into the ambient air. Heat recovery provides the opportunity to heat greenhouses or residential buildings, reducing the data centers environmental impact.

Maximize EV Range

Typically EVs use up precious energy to power their cooling systems. Switching to passive cooling can save this power for the e-motor increasing the range of any type of hybrid or full electric vehicle.

Let's Get Started

Schedule an introductory call with one of Calyos' two-phase experts.

Schedule Intro