Essentially its the pressure prior to entering the turbine chamber via the MSV (main stop valve)
Steam that was reduced in pressure from that at which it was generated in the boiler. Reducing the steam pressure can be accomplished by running it through a turbine or engine, a reducing valve or a regulator. Reduced pressure steam is often used for auxiliary equipment or heating systems after the primary process has been supplied steam at the generated pressure.
Steam is redirected back into the boiler from the high-pressure turbine for reheating, but the steam from the low-pressure turbine enters into a condenser to become water again.
In a back pressure turbine all available energy from the inlet steam is NOT used to generate power; steam exhausts at a tangible pressure and is then used for, usually, heating or chemical processing. In a condensing turbine, all the inlet steam does mechanical work right down to the lowest pressureafter which it is condensed in a heat exchanger
High pressure steam hits the blades of a TURBINE and turns its shaft.
it controls the over pressure of the water
It is usually controlled thorough a regulator which regulates the steam. a bit like a throttle on a car.
Steam that was reduced in pressure from that at which it was generated in the boiler. Reducing the steam pressure can be accomplished by running it through a turbine or engine, a reducing valve or a regulator. Reduced pressure steam is often used for auxiliary equipment or heating systems after the primary process has been supplied steam at the generated pressure.
Steam is redirected back into the boiler from the high-pressure turbine for reheating, but the steam from the low-pressure turbine enters into a condenser to become water again.
For a steam engine, the steam(throttle) valve that sets the engine speed/power is often known as a regulator. k.Shiva
Resistance offered by turbine to the steam
In a back pressure turbine all available energy from the inlet steam is NOT used to generate power; steam exhausts at a tangible pressure and is then used for, usually, heating or chemical processing. In a condensing turbine, all the inlet steam does mechanical work right down to the lowest pressureafter which it is condensed in a heat exchanger
The main uses for packing steam in a turbine are to produce electricity and power. The steam creates pressure when in turn spins a turbine at very high rates of speed.
Back pressure is the small amount of vacuum that is created when the used steam condenses from the turbine back into re-usable water.
To generate electricity from steam, a steam turbine is typically used. High-pressure steam is directed onto the turbine blades, causing the turbine to spin. The spinning turbine is connected to a generator, which converts the mechanical energy into electrical energy.
High pressure steam hits the blades of a TURBINE and turns its shaft.
A condensing turbine uses all the energy from the steam going from high pressure turbine to secondary turbine to condensing turbine then sends the condensate back for reheating. where a non condensing turbine just uses the high pressure aspect of the steam then returns the low pressure stream back to be reheated. Condensng turbines utilises the entire available drop from high pressure to the vacuum in the condenser; a back pressure turbine only utilises only the top part, whereas an exhaust steam turbine utilises only th bottom part of the pressure drop. Hope that helps.
Gland steam is steam supplied to the labyrinth glands of the low pressure turbine to prevent air entering in the exhaust side, which disturbs the vacuum (± 50 mbar absolute) in the condenser. Gland steam pressure is to supply at about 0,2 bar.