Table of Contents
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.
Why is the turning turbine necessary in a power plant?
That mechanical spinning in turn rotates copper-filled tubes in a magnetic field. The majority of power plants—whether coal, natural gas, nuclear or even wind—rely on a turbine to spin the generator and produce vast quantities of electricity. Improving these turbines saves fuel and pollution.
Which type of turbine is used in low pressure stages?
Impulse turbines are most efficient for use in cases where the flow is low and the inlet pressure is high. Reaction turbines develop torque by reacting to the gas or fluid’s pressure or mass.
What is high pressure and low pressure turbine?
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.
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 is the function of turbine rotor?
Tidal turbines Rotor blades are a critical structural component of the tidal turbine since they are responsible for harvesting the kinetic energy of the water and transmitting it through the main drive-train to the generator.
Why do we need a low pressure turbine to expand steam?
In turbine, as this high pressure steam is used to drive the turbine blades, it looses it energy and gets converted to low pressure steam. In case of reheating, since the steam which is to be further expanded is a low pressure steam, therefore we require a low pressure turbine to expand it.
What are the advantages and disadvantages of gas turbine power plant?
10. Gas turbine plants can be used in water scarcity areas. 11. Less pollution and less water is required. Disadvantages of gas turbine power plant. 1. 66\% of the power developed is used to drive the compressor; the gas turbine unit has a low thermal efficiency.
What is a steam turbine?
Steam turbines are available in sizes from under 100 kW to over 250 MW. Thermal output CHP configurations use backpressure or extraction steam turbines to generate power and thermal energy. Backpressure steam turbines produce low pressure steam while extraction turbines deliver both low pressure and medium pressure steam.
What is an LP turbine in a power plant?
LP Turbine – Low-pressure Steam Turbine Most of nuclear power plants operates a single-shaft turbine-generator that consists of one multi-stage HP turbine and three parallel multi-stage LP turbines, a main generator and an exciter.