How does a condensing steam turbine 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 condensing type turbine?
The condensing turbine is able to use the total energy of the inlet steam flow to a maximum extent. Therefore, this type of turbine is used for power utilities that want to supply electricity to consumers as much as possible.
How does a condenser in a power plant work?
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.
How do turbines work?
In a turbine generator, a moving fluid—water, steam, combustion gases, or air—pushes a series of blades mounted on a rotor shaft. The force of the fluid on the blades spins/rotates the rotor shaft of a generator. The generator, in turn, converts the mechanical (kinetic) energy of the rotor to electrical energy.
Does a turbine increase pressure?
There is no pressure change of the fluid or gas in the turbine blades (the moving blades), as in the case of a steam or gas turbine, all the pressure drop takes place in the stationary blades (the nozzles).
How do you calculate turbine stage?
Power development The theoretical maximum power produced by a turbine can be computed from the mass flow rate of the steam multiplied by the ideal enthalpy drop per unit mass between the steam generator exit and the condenser conditions.
How many turbine stages are there?
Typical of modern turbines is the Spey two-shaft turbine in which the four stages reach a design point efficiency of a little over 92 per cent.
How many stages does a low pressure turbine have?
A low pressure turbine within a turbofan jet engine consists of five repeating stages.
What is stage of turbine?
This combination of rows of guide (nozzle) vanes and moving blades (arranged in series) is a turbine stage. Turbine blades and inlet and outlet units form the flow passage. Turbines are classified as axial and radial (radial-axial) depending on the direction of the flow relative to the rotor rotation axis (Figure 1).
Why LP turbine is double flow?
In a double flow rotor, the blades in each half face opposite ways, so that the axial forces negate each other but the tangential forces act together. This design of rotor is also called two-flow, double-axial-flow, or double-exhaust. This arrangement is common in low-pressure casings of a compound turbine.
What does a low pressure turbine do?
The Low Pressure Turbine (LPT) is uniquely designed to provide high aerodynamic efficiency in low pressure ratio operation, to recover exhaust energy whilst minimising back pressure.
What is astern turbine?
The astern turbine is a single axial flow, velocity compounded, condensing impulse turbine consisting of one or two Curtis stages located on the forward and/or after end of the LP turbine.
What material is turbine blade?
Modern turbine blades often use nickel-based superalloys that incorporate chromium, cobalt, and rhenium.
Can a cruise ship go in reverse?
Cruise ships can not only reverse, using the main engines, but usually have transverse thrusters (bow and stern) that enable them to go sideways or pirouette.