In central flow condenser, the steam enters at the top of the condenser and flows in downward direction.
The cooling water flows through these tubes. Less power is required for water pumping.
After the condensation of steam, the condensate is pumped to the hot well with the help of condensate extraction pump. And this is done by increasing the pressure of condensate above boiler pressure.
Cooling Water Pump: Steam Condenser is a mechanical device which converts the low pressure exhaust steam from the turbine into water.
This type of condenser is used sometime because it lost some of the condensate and requires high power for the pump during the process of condensation. The condensate gets collected at the bottom and then pumped with the help of condensate extraction pump. As the low pressure steam comes in contact with the cooling water, it condenses and converts into water.
In these condensers, the cooling water is injected at the top. The condensate, cooling water and air moves downward and it is removed by two separate pumps known as air extraction pump and condensate extraction pump. The condensing plant using this type of steam condenser is simple and economical.
It is fixed in such a manner that any leakage of water into the center of condensing space is prevented. Surface condenser or non-mixing type condenser. It has high maintenance cost.
An injector pump is used to flow cooling water at the top of the condenser.
It is a pump used to extracts or removes the air from the steam condenser. Jet Condenser.
The pipe of dry air extraction pump is provided near the bottom and it is covered by baffle plates so as to prevent the entry of the condensate into it. Its working is similar as the low level jet condenser. The surface condenser on the basis of direction of flow of condensate, the arrangement of the tubing system and the position of the extraction pump are classified as.
The exhaust steam from the turbine or engine enters at the top and forced to move downward due to the suction of the air extraction pump. At the same time, current of air is made to circulate over the film of water.