What pressure do steam turbines run at?
What pressure do steam turbines run at?
In the biggest turbines, in large fossil-fuel power plants, the steam pressure can be as high as 20–30MPa (3000–4000 psi or about 200–270 times atmospheric pressure). A small, 10 megawatt steam turbine is roughly the same size as a Greyhound bus (a large single-deck passenger coach).
Why there is high pressure and low pressure turbine were installed together?
The high pressure turbine is designed to efficiently extract work out of the high pressure steam as it initially enters the main propulsion turbines. The low pressure turbine is designed to efficiently extract work out of steam which is exhausting out of the high pressure turbine at a lower pressure.
What is back pressure in steam turbine?
Back Pressure Turbines: a type of steam turbine that is used in connection with industrial processes where there is a need for low or medium pressure steam. The high pressure steam enters the back pressure steam turbine and while the steam expands – part of its thermal energy is converted into mechanical energy.
What is a turbine casing?
A turbine casing for a gas turbine comprises a casing defining the boundary of part of the turbine flow duct and formed from a plurality of segments, each segment being mounted from fixed structure by a plurality of radially extending struts.
How much pressure is required to run a turbine?
Typical inlet specifications for large turbines are 560C and 150 bar.
What is the condenser pressure?
The condensing pressure is the pressure at which the refrigerant is phase changing from a vapor to a liquid. This phase change is referred to as condensation. Thus the term condensing pressure.
What is Casing in steam turbine?
Steam turbines consist essentially of a casing to which stationary blades are fixed on the inside and a rotor carrying moving blades on the periphery. The rotor is fitted inside the casing with the rows of moving blades penetrating between the rows of fixed blades.
What is called as back pressure?
The back-pressure could be defined as the pressure within a system caused by fluid friction or an induced resistance to flow through the system. The necessary back-pressure is often created and controlled by a valve that is set to operate under the desired range of conditions.
What is HP IP and LP turbine?
high pressure, intermediate pressure and low pressure turbine. All three are mounted on the same shaft which rotates at 3600 rpm in a generator to make electricity. Here’s a simplified steam flow path through HP, IP and LP turbines. (
What material is used in turbine casing?
A material used for the casing is 1Cr-1Mo-1/4V low carbon alloy cast steel or 11Cr-1Mo-V-Nb-N cast steel. From the standpoint of exhaustion of fossil fuel such as petroleum, coal and so on and energy saving, it is required to improve the efficiency of a thermal power plant.
