Cooling is a critical factor in the design of ruggedised servers and computers. It determines the performance, reliability and lifespan of systems deployed in harsh environments. This guide presents the main cooling methods, their physical principles, advantages, limitations and typical use cases.
Ventilated cooling relies on the use of fans to force air circulation inside the chassis. The air extracts heat dissipated by components (CPU, GPU, FPGA, power supplies) before being expelled from the system.
Controlled industrial environments, technical rooms, ruggedised computers with moderate power requirements.
Air flow-through is an evolution of ventilated cooling. Airflow is precisely channelled through the chassis to evenly sweep critical components and eliminate hot spots.
High-performance industrial servers, high-performance computing systems in a controlled environment.
Conduction cooling transfers heat directly from components to the metal chassis, which acts as a heat sink. Dissipation occurs without internal air circulation. To increase efficiency, heat can be collected via cold plates and transported by heat pipes to optimised dissipation areas.
Defence, aeronautics, railways, space, naval, VPX systems and extreme environments.
Liquid cooling uses a heat transfer fluid circulating through cold plates or pipes in contact with the components. The heat is then dissipated via an external heat exchanger.
High-performance rugged servers, powerful embedded computers, industrial HPC applications.
Immersion cooling involves directly immersing electronic components in a dielectric liquid. The fluid absorbs and dissipates heat without contact with the air.
HPC, harsh environments, underwater or highly contaminated applications.
| Type | Thermal capacity | Robustness | Complexity | Cost | Use cases |
|---|---|---|---|---|---|
| Ventilated | Low to medium | Low to medium | Low | Low | Industrial |
| Air-Flow-Through | Medium to high | Medium | Medium | Medium | Intensive industrial computing |
| Conduction | Medium | Very high | High | High | Defence, Aerospace |
| Liquid | High | High | High | High | High-density servers |
| Immersion | Very high | Very high | Very high | Very high | HPC, extreme environments |
The choice of cooling method depends directly on the thermal, environmental, mechanical and operational constraints of the project. In ruggedised systems, thermal performance must always be assessed in conjunction with long-term reliability and actual deployment conditions.
Are you looking to integrate a ruggedised server or computer for a constrained environment? Contact our experts to define the cooling architecture best suited to your performance, reliability and certification requirements.
