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Loop Heat Pipes

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

Long distance yet passive transport capability.
Ability to handle extremely high heat flux with low thermal resistance.
The latent heat of vaporisation has a high heat transfer co-efficient.

How do Loop Heat Pipes work?

comparison

LHP vs Water

up to

100%

Less Power

Our totally passive heat transfer system requires no fans and no pumps - saving power for critical usage.

up to

10x

Lifetime

No pumps, no water, no short-circuits = no problems. Our systems are designed to be maintenance free.

up to

30%

Less Weight

Less components = less weight. This ensures maximizes efficiency and can create more space for power systems.

Common Applications

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

Batteries

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

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Electronic Components

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

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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.

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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.

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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.

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Servers

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.

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Our two-phase cooling systems always bring three clear benefits:

Passive & Pump Free

Ultra Reliable & Zero Maintenance

High HTC & Low Thermal Resistance

Loop heat pipes

Use Cases

There are thousands of use cases for our technology. Here we have selected a few examples to give you an idea of how our solutions can be used. Don't be afraid if you have something different - reach out to us and we can validate the application through an initial feasibility analysis.

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Our solution was designed to remove 2.4kW of thermal power from the inverter and recover this energy by pre-heating the HVAC system. Our LHP-PE solution transported the heat over 4m, completely passively, proving our ability to transport heat over long distance against accelerations.

E-Mobility

:

Light Vehicles

Power Inverter

Our solution was designed to remove 2.4kW of thermal power from the inverter and recover this energy by pre-heating the HVAC system. Our LHP-PE solution transported the heat over 4m, completely passively, proving our ability to transport heat over long distance against accelerations.
Power Electronics
In this application a high MTBF was critical. Our solution delivered that, while also ensuring an IP66 rating with a 100% passive solution (no fans). The cooling of two 150W components was achieved with completely natural convection.

E-Mobility

:

Rugged Computer

In this application a high MTBF was critical. Our solution delivered that, while also ensuring an IP66 rating with a 100% passive solution (no fans). The cooling of two 150W components was achieved with completely natural convection.
Embedded Processors
Here Calyos was targeting two 350W CPUs inside a 1U server chassis. The design was optimized for 75 CFM, ensuring quiet operation.

Computing

:

Server

2x CPU

Here Calyos was targeting two 350W CPUs inside a 1U server chassis. The design was optimized for 75 CFM, ensuring quiet operation.
Servers
In collaboration with Streacom, Calyos developed a 100% passive solution to cool a CPU and GPU within this desktop form factor.

Computing

:

Streacom SG10

In collaboration with Streacom, Calyos developed a 100% passive solution to cool a CPU and GPU within this desktop form factor.
Personal Computers
Our solution cooled 8 IGBT modules, with a total thermal power of 11.2kW. By reducing the thermal resistance of the cooling system, the client could reduce the number of IGBT modules reducing cost significantly. There are also no pumps, nor fans drastically reducing maintenance.

E-Mobility

:

Rail

Traction Inverter

Our solution cooled 8 IGBT modules, with a total thermal power of 11.2kW. By reducing the thermal resistance of the cooling system, the client could reduce the number of IGBT modules reducing cost significantly. There are also no pumps, nor fans drastically reducing maintenance.
Power Electronics
Using a 280mm radiator mounted above the evaporator this solution is capable of cooling a processor dissipating 300W. This is ideal for reliability critical applications due to the inherent fit and forget nature of an LHP-EE solution.

Computing

:

Workstation

Workstation AIO

Using a 280mm radiator mounted above the evaporator this solution is capable of cooling a processor dissipating 300W. This is ideal for reliability critical applications due to the inherent fit and forget nature of an LHP-EE solution.
Personal Computers

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.

Manufacturing

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.

Other Two-Phase Technologies

Calyos produces other technologies that could be equally relevant for resolving your thermal challenges. Check them out.

Heat Pipes

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

Learn MoreHeat 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

Let's Get Started

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

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