What is air cooled steam condenser?
An air cooled condenser (ACC) is a direct dry cooling system where steam is condensed inside air-cooled finned tubes. In thermal power plants (T), the steam from the turbine exhaust flows into the ACC where condensation occurs. Then the condensate returns to the boiler (B) in a closed loop.
What is condenser in steam turbine?
A surface condenser or steam condenser is a water-cooled shell and tube heat exchanger used to condensate the exhaust steam from the steam turbine in thermal power stations: the steam is converted from gaseous to liquid state at a pressure level below atmospheric pressure.
How does a steam turbine condenser work?
Condensing steam turbines are most commonly found in thermal power plants. This is achieved by passing the exhaust steam into a condenser (called a surface condenser), which condenses the exhaust steam from the low-pressure stages of the main turbine (decreases the temperature and pressure of exhausted steam).
What is the advantage of condensing the steam?
The main advantages of incorporating a steam condenser in a steam power plant are as follows: It increases the efficiency of the power plant due to increased enthalpy drop. It reduces back pressure of the steam which results in more work output.
Why condenser is used in steam turbine?
In thermal power plants, the purpose of a surface condenser is to condense the exhaust steam from a steam turbine to obtain maximum efficiency, and also to convert the turbine exhaust steam into pure water (referred to as steam condensate) so that it may be reused in the steam generator or boiler as boiler feed water.
What are the source of air in a steam condenser?
The main sources of air leakage in the condenser are: (i) Leakage of air from atmosphere at the joints of the parts which are at pressure less than atmospheric pressure. (ii) Air is coming from the boiler along with steam. This air enters in the dissolved form in the feed water.
Why do we need condenser in steam power plant?
The main purpose in steam power plant is to generate maximum power at high efficiency. The most effective way for reaching this aim is to use a condenser. Condensers increase the enthalpy drops and turbine work by lowering the turbine outlet pressure. The lower the pressure, the higher the efficiency and power are.
What is the advantage of an air cooled condenser?
Advantages of this type of condenser are low initial cost, less flow area required, less cooling water required and low maintenance charges. However its disadvantage is condensate is wasted and high power is required for pumping water.
Why is condenser used in boiler or steam power plant?
The use of condensers in thermal power plant or steam power plant improves the efficiency of the power plant by decreasing the exhaust pressure of the steam below the atmosphere.
What is a condenser in a steam turbine?
Condenser (steam turbine) Condenser refers here to the shell and tube heat exchanger installed at the outlet of every steam turbine in Thermal power stations of utility companies generally. These condensers are heat exchangers which convert steam from its gaseous to its liquid state, also known as phase transition.
What is the temperature of the steam in a turbine?
A steam turbine consists of stationary and rotating blades on an axle. High pressure steam enters the turbine. The steam can be anywhere from 200 °C to 400 °C. The stationary blades direct streams of high pressure steam onto the rotating blades, which turns the axle.
What is the function of air ejector in steam turbine?
Air Ejector for Marine Boiler Feed System / Steam Turbines The air ejector draws out the air and vapours which are released from the condensing steam in the condenser. If the air were not removed from the system it could cause corrosion problems in the boiler.