Condenser 

Air condenser

The Condenser

The condenser changes a vapour into liquid by extracting heat. The high-pressure gaseous refrigerant, which carries the heat energy absorbed in the evaporator and the work energy from the compressor, is conducted to the condenser. The condensing temperature of the refrigerant is higher than the ambient air temperature. Therefore, in a heat transfer process, the refrigerant condenses from the high-pressure vapour to the high-pressure saturated liquid.

Condensation of the refrigerant gas enables further flow through the liquid line towards the expansion valve and evaporator and starts the next refrigeration cycle. In practical applications, it is often desired that the condenser cools the refrigerant below the condensation temperature. This is called subcooling. 

Condenser capacity depends on the DT (Differential Temperature) between the ambient temperature and refrigerant condensation temperature. As the ambient temperature decreases, the DT increases resulting in an increase of the condenser capacity.  

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