The evaporative condenser is essentially a combination of a water-cooled condenser and an air-cooled condenser, using the principle of heat dissipation through the evaporation of water in a flow of air travelling through the condensing coil. While water-cooled condensers require a lot of water flow, evaporative condensers use a small portion of cooling water loss per unit of cooling capacity. The compact design also requires less space and offers greater cooling capacity.

The evaporative condenser system typically consists of a series of tubes carrying hot refrigerant gas. These tubes are simultaneously exposed to a spray of water and a flow of air facilitated by a fan. Some of the water flowing over the gas-filled tubes evaporates due to a combination of heating the tubes and the airflow. This evaporation is the mechanism that allows rapid cooling of the refrigerant gas, which is then pumped back, the remaining water being collected and recirculated over the condenser coils.

Parts of Evaporative Condenser:
1) Water Pool or Reservoir:
in an evaporative condenser, there is a water pool that contains cool water.

2) Water Pump:
The water pool is connected to a water pump through a pipe.

3) Header:
This header is present on the top and water is supplied to the header from the water pool using a water pump. This header has nozzles that convert water into the spray and then water is sprayed from the header.

4) Steam Inlet:
Steam is supplied through this steam inlet which is to be cooled and converted into water. The steam inlet is connected to the water pool through tubes. These tubes are called finned tubes as there are many fins attached to the tube.

5) Finned Tube:

The tubes which connect the steam inlet and water pool is called finned tube as lots of fins are attached to these tubes.
The tubes are in the form of coils and their length is more so that they can be used to cool the vapor easily.
The function of fins is to increase the contact time of steam with water sprayed from the header and also increase the contact area of the tube with sprayed water.

These fins will help to coll the steam faster and convert it to water.
Fins will help to cool the tubes faster and tubes will cool the steam faster and convert it into water.

6) Eliminators:
Eliminators are used to eliminate the gas in the vapor and separate the water vapor from the gas in the vapor.

7) Air Extraction Pump:
An air extraction pump is used to take out the air present on the top of the evaporative condenser. Air is also supplied to cool the vapor and this air is taken out by an air extraction pump.

8) Condensate Pump:
Condensate Pump is used to extract the condensed liquid at the end of the finned tube.