Free Cooling Dry Cooler in Modular HVAC Chillers

Free Cooling Dry Cooler in Modular HVAC Chillers

Free Cooling dry coolers are a common component of modular HVAC chillers that use air-side economization for cooling. These systems work by using cool outdoor air to cool the refrigerant in the chiller, instead of using mechanical refrigeration to cool the air.

The dry cooler is a key component in the free cooling system, as it is responsible for exchanging heat between the refrigerant and the outdoor air. Dry coolers are essentially large heat exchangers that use a series of metal fins and tubes to transfer heat from the refrigerant to the outdoor air.

During free cooling operation, the dry cooler draws in cool outdoor air through fans and passes it over the heat exchanger coils, which transfer heat from the refrigerant to the air. As the air passes over the coils, it absorbs heat from the refrigerant and is then discharged back into the outdoor environment, while the cooled refrigerant is then circulated back into the chiller to cool the indoor air.

Modular HVAC chillers that use free cooling dry coolers are highly efficient and cost-effective, as they can significantly reduce the energy consumption and operating costs of the cooling system. They are particularly useful in climates where the outdoor air temperature is lower than the desired indoor temperature, as they can provide cooling without the need for mechanical refrigeration.