Control cabinet heat exchangers from häwa
Heat exchangers in control cabinets and enclosures are part of the air conditioning system. Their primary function is to dissipate heat generated by the components in the control cabinet or enclosure. Häwa offers two types of heat exchangers: air-to-air and air-to-water.
Where are heat exchangers used for cabinet cooling?
To ensure that all components installed in the enclosure or control cabinet function smoothly at all times, it is necessary to maintain their comfort temperature. This varies depending on the components and the environment. A sophisticated system for climate control of the enclosures is therefore indispensable. Heat exchangers are used primarily in applications where the ambient air is contaminated by dust, liquids or gases. In these cases, it does not make sense to use a filter fan for air conditioning, because it draws in air from outside, allowing the potentially harmful substances to enter the enclosure and damage the components.
How does a heat exchanger work?
Two different types of heat exchangers are used by häwa.
- Air-to-air heat exchangers: consist of an aluminum register and a sheet steel housing, and are equipped with two fans – one in the inner circuit and one in the outer circuit. They circulate the air in the control cabinet or enclosure by drawing in the heated air from inside the cabinet and flowing it through the cabinet or enclosure. The same happens with the fan in the external circuit, but it draws in the cooler ambient air (this principle only works when the ambient air is cooler). The temperature of the air is exchanged in the register using the counterflow principle. The two separate circuits prevent foreign bodies such as dust or moisture from entering the control cabinet. In addition, air/air heat exchangers are comparatively inexpensive to purchase, have low power consumption and combine high output with a flat design. This means that they can be easily and space-savingly attached to the control cabinet as a built-in or add-on unit, roof structure or partial mounting.
- Air/water heat exchangers: In air/water heat exchangers, water is used to cool control cabinets. This makes them an environmentally friendly alternative to air conditioners that use coolants. It is advantageous if a suitable pipe infrastructure and, of course, a cool water source are already available.
If these points are given, these control cabinet heat exchangers are more effective than air-to-air heat exchangers. They can lower the internal temperature in the enclosure or cabinet below the ambient temperature. The required cooling capacity can be calculated based on the power loss – this way, we can work together to find the right device for your company. Air-to-water heat exchangers are also well suited for dirty environments because they have two separate circuits, preventing dust, etc. from entering the control cabinet via an external circuit. They guarantee the control cabinet's type rating of IP54 and are suitable for use in high outside temperatures.
The best switch cabinets and casings are not produced on an assembly line, but rather designed in close cooperation with our customers. Are you ready to begin? Then contact your personal häwa consultant.
