How does a moisture separator reheater work?

A pair of moisture separator-reheaters are located between the high pressure stage and the low pressure stage of the turbine, to provide some reheating to the steam entering the low pressure stage and to remove some of the moisture. This increases steam cycle efficiency and reduces erosion of the turbine blades.

What is the function of reheater in gas turbine?

2. In gas turbine, what is the function of Re-heater? Explanation: In order to make a thermodynamic process of larger efficiency, it is shifted towards isothermal behavior.

What are the two benefits of adding a reheater to a Rankine 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.

How does a feedwater heater work?

The feedwater heaters are constructed of tubes through which feedwater is passed. The water is heated by steam from the turbine. The steam being at a higher temperature condenses on the outside of the tubes and gives up its latent heat to the feedwater. The temperature of the feedwater is thus increased.

Which two turbine has between in reheater?

All turbines, that have high-pressure turbine and low-pressure turbines use a steam reheat between these stages.

What is reheater power plant?

A reheater is basically a superheater that superheats steam exiting the high-pressure stage of a turbine. ... By reheating steam between high-pressure and low-pressure turbine it is possible to increase the electrical efficiency of the power plant cycle beyond 40%.

How does a desuperheater work?

The hot water generating component of a geothermal system is called a desuperheater. ... A little circulator pump pulls water out of the water heater and pumps it through a heat exchanger inside the geothermal unit where it picks up heat. The warmer water is then pumped back into the water heater.

Why is compounding of steam turbines done?

Compounding of steam turbine is used to reduce the rotor speed. It is the process by which rotor speed come to its desired value. A multiple system of rotors are connected in series keyed to a common shaft and the steam pressure or velocity is absorbed in stages as it flows over the blades.

What is the function of reheater in boiler Mcq?

clarification: The function of Re-heater is to re-superheat the partly expanded steam from the turbine so that the steam remains dry as far as possible through the last stage of turbine. Modern plants have reheaters as well as super heaters in the same gas passage of the boiler.

What is the purpose of reheat cycle Examveda?

Solution(By Examveda Team)

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 a reheater in the thermal power plant Mcq?

Explanation: Reheat increases work output.

What is a feedwater heater used for?

Introduction. A feedwater heater is used in a conventional power plant to preheat boiler feed water. The source of heat is steam bled from the turbines, and the objective is to improve the thermodynamic efficiency of the cycle.

What is open feedwater heater?

An open heat exchanger is one in which extracted steam is allowed to mix with the feedwater. This kind of heater will normally require a feed pump at both the feed inlet and outlet since the pressure in the heater is between the boiler pressure and the condenser pressure.

How does a feedwater economizer work?

A feedwater economizer reduces steam boiler fuel requirements by transferring heat from the flue gas to incoming feedwater. Boiler flue gases are often rejected to the stack at temperatures more than 100°F to 150°F higher than the temperature of the generated steam. ... The stack temperature is measured at 500°F.

What effect does the heating of feedwater by steam bled from the turbine has on the Rankine Cycle?

5. What effect does the heating of feedwater by steam 'bled' from the turbine has on the Rankine Cycle? Explanation: The heating of feedwater by steam 'bled' from the turbine, known as regeneration, carnotinises the Rankine cycle. 6.

How with the incorporation of reheater in thermal power plant the efficiency of the plant can be enhanced analyze using Rankine Cycle?

In case of two reheats, steam is super-heated twice at different constant temperatures. A high reheat pressure increases the the moisture content at turbine exhaust which results in scaling and it should be optimised. Thus the work produced is increased ,thereby efficiency increases.

What are the components of steam powerplant?

What are the components of a Steam Power Plant? Explanation: A Steam Power Plant has the sequence,Boiler, Turbine, Condenser, Pump.

What is the action of steam in a steam turbine?

What is the action of steam in a steam turbine? Explanation: Steam action in a steam turbine is Dynamic. Explanation: The critical pressure gives the velocity of steam at the throat which is equal to the velocity of sound. Explanation: The required degree of reaction will be 0.67.

What is regeneration and reheating?

Reheating of steam improved the thermal efficiency of the plant, net work output of turbine, reduction in blade erosion (or quality of steam improve). By regeneration thermal efficiency of the plant can be increased but it does not affect work output from turbine.

What is the function of nozzle in steam turbine?

1) The main function of the steam nozzle is to convert heat energy to kinetic energy. 2) To direct the steam at high velocity into blades of turbine at required angle. 1) Steam & gas turbines are used to produces a high velocity jet. It is a nozzle with large entrance and tapers gradually to a smallest section at exit.