HVAC and Electrical Technical Photos HVAC Air Conditioning Chiller Barrel Evaporator Barrel - Chilled Water Air Conditioner Previous | Home | Next

HVAC Air Conditioning Chiller Evaporator Barrel

A chiller evaporator barrel exchanges heat between one refrigerant and another. Usually the primary refrigerant is R-22, R-134A, or some other blend or alternative HFC. The secondary refrigerant is water or a water and glycol solution. This water and/or glycol solution is circulated throughout the building where is passes through piping and coils. This is generally is most cases a forced air coil where the heat is removed from the air by a heat exchange process with the water and the coil. The cooler air is then forced through ductwork and into the space to be conditioned.

The water is then pumped back through the chiller barrel evaporator so that the heat absorbed can be removed in the chiller barrel evaporator where another heat exchange process is done. The heat in the water is absorbed into the refrigerant and the water makes another trip to the building to absorb more heat. The refrigerant is then pumped to the compressor where it is compressed and then it travels through a condenser coil or a condenser barrel where the heat it absorbed from the water is rejected. This is the basic process for a chiller. There are many different types of chillers which use different refrigerants but that is the basics of a chillers operation. Chillers range from small residential units to very large multi-tonnage systems which serve very large buildings.

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