Evaporative cooling has become the essential solution for businesses and industries looking to combine thermal comfort with environmental protection. Faced with increasingly frequent heatwaves and rising energy costs, traditional air conditioning systems (direct expansion) are reaching their limits: they are too electricity-intensive, costly to install, and use polluting refrigerants. At Climatik, we advocate bioclimatization to cool large spaces in a healthy, economical, and sustainable way.

What is evaporative cooling?

The principle of evaporative cooling is not new; it is a natural physical phenomenon observed near waterfalls or when one emerges from water into a strong breeze. It is also called "evaporative" because it uses the energy contained in the air to evaporate water, thereby causing an immediate drop in temperature.

The physical process (Enthalpy)

In an evaporative cooler, hot outside air is drawn through wet media (often honeycomb cellulose pads). As it passes through these water-soaked pads, the air releases its sensible heat to allow the water to evaporate. The result is that the air exits at a significantly lower temperature (generally between 5°C and 12°C less) and with a slightly increased relative humidity.

• The secret: The hotter and drier the outside air, the higher the system's efficiency. Thus, it is precisely when it is most needed that the cooler performs best.

1. Why choose evaporative cooling for your buildings?

Evaporative cooling offers advantages that surpass standard air conditioning in many sectors, particularly for high-rise or semi-open structures.

Massive energy savings

This is the number one argument. An evaporative air cooler does not have a compressor (the most energy-consuming component of an air conditioner). Only a fan and a small circulation pump consume electricity.

• Climatik's observation: Electricity consumption is reduced tenfold compared to conventional air conditioning for an equivalent surface area.

Healthy and continuously renewed air

Unlike air conditioning, which often operates in a closed circuit (recycled air), evaporative cooling operates on the principle of "all fresh air." The air is filtered by the wet media, cleaned of dust and pollen, and then blown into the building. This creates a natural overpressure that expels hot air, odors, and pollutants outdoors via openings.

An ecological solution (Zero greenhouse gases)

Evaporative systems do not use any refrigerants (such as R410A or R32), whose global warming potential is thousands of times greater than CO2. Water is the only thermal agent used.

2. Ideal applications for evaporative cooling

At Climatik, we install these systems in a wide variety of environments where traditional air conditioning would be technically or financially unfeasible.

• Industrial buildings and warehouses: Cooling 5,000 m² with 8-meter ceilings is a financial abyss with traditional air conditioning. Evaporative cooling makes it possible to maintain decent working conditions at a negligible cost.

• Logistics centers: To protect goods sensitive to excessive heat without drying out the air.

• Shops and garden centers: Constant air renewal is ideal for places open to the public, while preserving the hydration of plants.

• Workshops with thermal machines: The system can "sweep away" the heat generated by industrial processes (presses, ovens, servers).

Performance and power calculation

The performance of evaporative cooling depends on external humidity conditions. The psychrometric chart (Mollier diagram) is used to predict the supply air temperature.

3. Maintenance and hygiene: Climatik guarantees

A persistent concern surrounds the use of water in air treatment (risk of legionellosis). It is important to specify that evaporative cooling is a safe technology:

1. No micro-droplets: Evaporation is purely gaseous. Unlike misting, there are no water droplets projected into the airflow.

2. Automatic draining: The machines selected by Climatik perform automatic draining and rinsing cycles to prevent stagnant water and scale build-up.

3. Media drying: With each prolonged shutdown, the fans continue to run to completely dry the cellulose pads, preventing any organic growth.

Why entrust your project to Climatik?

The success of an evaporative cooling installation relies on precise calculation of airflow rates and extraction points.

• Customized sizing: We calculate the number of air changes per hour (generally between 15 and 30 times the total volume) to ensure effective thermal sweeping.

• Hybrid management: We can couple these systems with automated controls that manage the opening of windows or roof extractors based on the interior temperature.

• Robustness: Our devices are designed to last, with UV-resistant casings and accessible components for simplified maintenance.

Conclusion

Evaporative cooling represents the future of air conditioning for large volumes. It is a solution that addresses the three major challenges of our time: employee comfort (CSR), control of operational costs, and reduction of carbon footprint.

By choosing Climatik for your bioclimatization project, you opt for cutting-edge technical expertise and high-performance equipment. Do you want to perform a temperature gain simulation for your building? Contact our engineers for a personalized study and enjoy a serene, cool, and responsible summer.