Table of Contents
- 1 What drives the turbine in a power station?
- 2 What is the highest moisture content allowed in steam turbines?
- 3 Why moisture is bad for turbine?
- 4 What is the maximum content of moisture allowed?
- 5 Why is steam used to rotate the turbine?
- 6 How much moisture can a steam turbine handle?
- 7 What can a backpressure steam turbine be used for?
- 8 How does pressure change in a water turbine?
What drives the turbine in a power station?
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.
What is the highest moisture content allowed in steam turbines?
The highest moisture content allowed is about 20 percent. Excessive moisture in steam causes erosion on the turbine blades. Excessive moisture in steam causes erosion on the turbine blades. Excessive moisture in steam leads to an increase in the temperature of the cycle.
Why it is important to drain the condensate inside the turbine casing?
Why is it necessary to open casing drains and drains on the steam line going to the turbine when a turbine is to be started?. Answers: To avoid slugging nozzles and blades inside the turbine with condensate on start-up; this can break these components from impact. The blades were designed to handle steam, not water.
Why moisture is bad for turbine?
Moisture however plays havoc with Turbines, Power Generators, Boilers, Condensers etc. These equipment begin to rust and corrode while in storage or while in operation. Heat does not spread evenly on the corroded steel blades which results in unsatisfactory vibration.
What is the maximum content of moisture allowed?
Explanation: The maximum content of moisture allowed at the turbine exhaust in the steam power plant is 15 %.
What are turbine internal drains?
The drains system serves to reliably remove water arising in the steam turbine and the connected pipes under all service conditions. The proper functioning of the drains system is a prerequisite of turbine safety and high availability alike.
Why is steam used to rotate the turbine?
When steam blows into the turbine, the spinning blades (fitted inside the outer container) are flown at higher rates. Because of high pressure, the continuous flow of electricity is generated at incredibly high speed, therefore the rotating speed increases when comparing with other wind and water turbines.
How much moisture can a steam turbine handle?
CSTs specially designed for utility-scale power plants can handle as much as 10–12% moisture. Process plants should avoid normal operation at this limiting condition, and should aim to stay at least 20°F above the exhaust steam dewpoint.
What is the role of a turbine in a hydro power plant?
Turbine – generator unit. The role of the turbine is to transform the energy of water, steam or wind into mechanical energy that will make the generator spin. The generator transforms the mechanical energy into electricity. In hydropower plants, this combination of generator and turbine is called a generating unit.
What can a backpressure steam turbine be used for?
Backpressure steam turbines (BPSTs) produce low-pressure (LP) exhaust steam that can be used for one or more process heating duties ( Figure 1a ). The objectives are to provide the process with steam of the quantity and pressure required by the process, while generating the maximum amount of power so as to reduce the need for purchased power.
How does pressure change in a water turbine?
No pressure change occurs at the turbine blades, and the turbine does not require housing for operation. The high-pressure water jet pushes on the blades of the turbines. The direction of the flow is changed. The resulting change in momentum results in a force exerted on the turbine blades and leads to the turbine spinning.