Cooling with phase change

The word "Phase" in the term "phase change" refers to the different states in which a substance can exist. The most common are the solid state (ice), liquid (water) and gas (steam). When a substance changes its state absorbs or releases energy.

For example, when we try to freeze water (change of state from liquid to solid), we have to subtract heat. When we want to bring water to the gaseous state (change of state from liquid to gas) we have to provide heat, and finally if we want to condense the steam into water (liquid) we must once again subtract heat. The same principle is used in a cooling system called precisely "phase-change".

The operating principle is the same as a refrigerator: the vapor (gas refrigerant such as R134) is compressed into the condenser through a compressor. When the vapor becomes liquid in the condenser, heat is released. From the condenser the liquid is transported to the evaporator through a capillary tube. The function of the capillary tube is to oppose the most possible resistance to flow of the refrigerant, creating a pressure difference between the condenser and evaporator. As soon as the refrigerant enters the evaporator, it starts to boil. This procedure removes heat from the surfaces of the evaporator itself, and therefore these walls tend to cool. The steam that is formed is sucked into the compressor, where it is compressed again to restart the cycle. The dryer (dehydrator filter) removes residual water and impurities from the refrigerant gas by preventing the onset of obstructions inside the capillary tube.

DimasTech manufactures evaporators of all shapes and sizes to suit every type of application. This type of cooling is well suited for medical applications or applications in which the temperature on the single point spot needs to be less than 0°C. The technology developed for the cooling of electronic components allows us to develop solutions with movable evaporators inside machinery, or maneuvered by the operator to be positioned on the object or component to be cooled.

This type of cooling is ideal for industrial machinery in which you want to have maximum efficiency. Choosing a cooling system with a refrigeration cycle system will choose an efficient and scalable, but above all we eliminate the inefficiencies of a typical liquid cooling. DimasTech Systems assists clients throughout the process of design / build and implementation of this efficient cooling system, also helping to reduce fuel consumption and make the machines and applications more Eco-friendly.

Advantages: Exercise temperatures from -50°C, Energy Efficiency, High DimasTech Know-How
Disadvantages: Risk of formation of condensation, costs