Theory and operation - Evaporative condensers
The evaporative condenser is a particular refrigerant condenser that exploits the same physical principle of the cooling tower in order to dissipate the heat.
The refrigerant (hydrohalocarbon or ammonia) to be condensed enters the upper header of a coil which is constantly wetted by the recirculating water of the small, pre-assembled evaporative circuit of the unit.
The evaporation of a part of the recirculating water removes the heat from the heat exchanging surface of the coils.
The performance of an evaporative condenser, like a water cooling tower, depends on the ambient wet bulb temperature.