The main purpose of reheating is to avoid excess moisture in steam at the end of expansion to protect the turbine .
What is the purpose of reheating in gas turbine?
The main purpose of reheating is to avoid excess moisture and to increase the quality of steam at the end section of turbine .
What is the use of reheat cycle in steam turbine?
The reheat cycle increases the turbine work and consequently the net work of the cycle . This is accomplished not by changing the compressor work or the turbine inlet temperature but instead by dividing the turbine expansion into two or more parts with constant pressure heating before each expansion.
What do you mean by steam reheating and why it is required?
The steam must be reheated or superheated in order to avoid damages that could be caused to blades of steam turbine by low quality steam. High content of water droplets can cause the rapid impingement and erosion of the blades which occurs when condensed water is blasted onto the blades.
What is the basic principle of regeneration?
What is the basic principle of regeneration? Explanation: In regeneration steam from condenser is circulated through turbine to increase steam temperature before it enters boiler . Explanation: Feedwater is preheated so as to decrease the fuel consumption which increases efficiency.
Why reheating is done?
Advantages of Re‐heating:
Heat supply increases. Thermal efficiency mat increase or decrease depending upon the mean temperature of heat addition. Due to reheating, the turbine exit dryness fraction increases so moisture decreases ‐ so blade erosion becomes minimum ‐ so life of the turbine will be increased .
Why do we use economiser?
An economizer is a mechanical device used to reduce energy consumption . Economizers recycle energy produced within a system or leverage environmental temperature differences to achieve efficiency improvements.
What is reheat turbine?
description. In turbine: Reheat and nonreheat turbines. If high-pressure, high-temperature steam is partially expanded through a turbine, the efficiency can be increased by returning the steam to the steam generator and reheating it to approximately its original temperature before feeding it back to the turbine.
Is one of the advantage of reheat cycle?
Advantages: The advantages of using a reheat cycle are higher thermal efficiency , reduced feed water pump power, smaller condenser, smaller boiler, long life of the turbine and less handling of the fuel and firing requirement.
What are the main parts of RE heat cycle?
- Turbine.
- Gas Turbines.
- Steam Turbines.
- Combustor.
- High-Pressure Turbine.
- Organic Rankine Cycle.
- Rankine.
- Steam Generator.
What is the cause of reheat factor in a steam turbine?
Explanation: Reheat factor is the ratio of cumulative heat drop to isentropic enthalpy drop. Explanation: The value of reheat factor depends on stage efficiency, final pressure and initial pressure and condition of steam . ... The steam temperature drops when it comes in contact with the feed water and thus is condensed.
What are the components of steam power plant?
A steam power plant consists of a boiler, steam turbine and generator, and other auxiliaries . The boiler generates steam at high pressure and high temperature. The steam turbine converts the heat energy of steam into mechanical energy. The generator then converts the mechanical energy into electric power.
What is the process of regeneration and why is it important?
Regeneration is the natural process of replacing or restoring damaged or missing cells, tissues, organs, and even entire body parts to full function in plants and animals . Scientists are studying regeneration for its potential uses in medicine, such as treating a variety of injuries and diseases.
What is the air standard cycle for a gas turbine called?
What is the air standard cycle for a Gas-Turbine called? Explanation: Brayton cycle is an ideal air standard cycle for a Gas turbine, which, like the Rankine cycle, also comprises of two reversible adiabatic & two reversible isobars.
What is the function of regenerator Sanfoundry?
Regenerator uses the heat of exhaust gas to heat compressed air before it is sent to combustion chamber . This reduces the fuel consumption and improves the cycle thermal efficiency.
Why both reheating and regenerating is used together?
Explanation: When vaporization pressure is high, the reheating of steam is adopted. 2. Why both reheating and regeneration is used together? Explanation: Thus a modern steam power plant has both reheating and regeneration.
