Calyos

Updated 16 Jul 2026
Manufacturer Belgium Listed
4 Products
5 Services
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About Calyos

Calyos is a Belgian thermal management company based in Charleroi (Jumet), specializing in passive two-phase cooling technologies. The company develops and manufactures heat pipes, loop heat pipes (LHPs), pulsating heat pipes (PHPs), and micro channel heat pipes (MCHPs) for demanding thermal management applications.

Two-phase cooling technologies are used in space applications for managing waste heat from electronics and propulsion systems — Calyos has worked with ESA and aerospace primes on thermal management solutions. Their passive approach (no moving parts, no pumps) makes their products well-suited to the reliability requirements of space systems.

Calyos serves markets in e-mobility, data centers, renewable energy, and specialized equipment. The company is supported by the European Regional Development Fund and the Wallonia Region of Belgium.

Products

4

Traditional heat pipe technology providing low thermal resistance passive cooling — scalable to application size, exploits latent heat of vaporization.

2

Long-distance passive heat transport for high heat flux applications — up to 100% less power, 10x lifetime, and 30% less weight than water-based cooling.

1 3

Hybrid HP-PHP flat aluminium heat pipe design — lightweight, customizable in length and bends, for batteries and embedded electronics.

1 2

Oscillating heat pipe technology with less reliance on gravity — customizable thin/3D form factors, PHP Spreader research prototype dissipates 800W.

1 2

Additional Services

5
Integration & testing
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Rapid Prototyping and Small Series Production

Calyos offers rapid prototyping and small series production services through its specialized Innovation Factory. This facility is designed for swift and efficient production, allowing the company to quickly adapt to and meet customer demands with precision. Equipped with the latest…

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Testing & qualification
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Prototype Testing and Thermal Performance Evaluation

Calyos provides comprehensive testing services through its state-of-the-art Testing Laboratory. This facility is equipped with cutting-edge technology and staffed by expert test engineers who specialize in replicating real-world scenarios. The service focuses on precise testing of prototypes and solutions across…

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Engineering & analysis
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Advanced Modelling and Simulation

Calyos offers advanced modeling services for two-phase cooling systems. This service integrates physics-based simulations with complex models that are derived from empirical test data. The company emphasizes that two-phase modeling is challenging, and their approach crucially ensures accuracy by balancing…

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Design and Production of Cooling Systems

Calyos offers a service where their team of experts designs and produces cooling systems tailored to customer needs. This involves utilizing their knowledge of two-phase technologies, including MCHPs, Oscillating Heat Pipes, Traditional HPs, and LHPs. They focus on creating proprietary…

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Manufacturing
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Mass Production Fulfillment through Partner Network

Calyos provides a service for fulfilling mass production needs for its clients by utilizing a robust network of production partners across various markets. This service ensures precision and efficiency in manufacturing, extending Calyos' capabilities to tackle projects of any scale…

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