Ejector Condenser- Definition, Construction, Working and More |

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What is Ejector Condenser?

A heat exchanger that combines a steam-powered ejector that continuously collects air to maintain a vacuum within the vacuum steam condenser and a condenser that condenses the steam to reuse it, Known as Ejector Condenser.

Related Article- Jet Condenser- Definition, Types, Application and Advantages

Construction of Ejector Condenser-

The condenser chamber is made out of a central vertical tube with a string of numerous cones or converging nozzles running through it. Exhaust steam enters the cylindrical condenser chamber from the side. There are a number of wholes or steam valves in the centre tube.

High-velocity cooling waterfalls on the top converging nozzle. One by one, the water flows down through the converging nozzles. Steam enters the nozzles through the steam outlet. When steam comes into contact with cooled water, it condenses, resulting in a partial vacuum.

As a result of the vacuum, additional steam enters the vertical tubes through the steam valves, condenses, and creates more vacuum. The bottom diverging nozzle receives a combination of cooling water, condensed steam, uncondensed steam, and humid air.

The kinetic energy is partly converted into pressure energy in the diverging nozzles, allowing condensates and air to be released into the hot well against atmospheric pressure.

In the event of a sudden breakdown of the condenser’s water supply, a non-return valve is normally installed in the exhaust steam intake to avoid a rapid backward flow of water into the turbine exhaust pipe.

Ejector condenser

Related Article- Surface Condenser: Working, Types, Advantages and Disadvantages

Working of Ejector Condenser-

Steam and water combine simultaneously in an ejector-type condenser and flow through a set of metal cones. The exhaust steam is entered into the condenser shell by a non-return valve system.

Water enters through a series of guide cones at the top. The hollow truncated cones allow steam and air to pass through. Kinetic energy is partially converted to pressure energy in the cone.

The condensate is collected and discharged into the hot well.


The following are the benefits of using an Ejector Condenser:

  • Simple
  • Reliable
  • Economical
  • Small in size



The following are the drawbacks of using an Ejector Condenser:

  • Requires more water
  • Applicable in power plants only


Related Article- Difference between Jet condenser and Surface condenser

Wrapping Up-

For the time being, that’s all there is to say about the Ejector Condenser.

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Here are some additional related Topics that you might be interested in learning about:

Condenser: Definition, Principle, Types, Working, Advantages

What’s the Difference between condenser and Evaporator?

Condenser and Vacuum Efficiencies: Everything You Need To Know

Difference between High Level and Low Level Jet Condenser

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