This method is called regeneration feed heating and the cycle is called regeneration cycle.This is made by Extract or vent a small amount of steam from a suitable point Throughout the turbine stage, the heat of the extracted or exhausted steam is utilized.

What is the purpose of feed heating?

introduce. Feedwater heaters are used in conventional power plants to preheat boiler feedwater.The heat source is the steam exhausted by the turbine, and the target is Improve the thermodynamic efficiency of the cycle.

What is the role of optimal feed water temperature in the regeneration feed heating cycle?

regeneration Improve cycle efficiency by increasing the initial feed water temperature before the water enters the boiler And also helps control the large flow of steam at the turbine exhaust.

What is the ideal regenerative reheat cycle?

Ideal Regenerative Rankine Cycle

During this process, heat is transferred to the working fluid Process 2-2 at relatively low temperature. This lowers the average heating temperature, which reduces cycle efficiency. In a steam power plant, steam is extracted from different points in the turbine.

In which part of the cycle is steam vented for feed water heating?

The exhausted steam enters first desuperheating zone enclosure And is cooled while raising the temperature of the feed water leaving the heater to a level close to or equal to the saturation temperature of the steam. The condensing zone is the largest heat transfer area within the heater enclosure.

4.5 Regenerative feed heating and steam venting

41 related questions found

Which statement is true about open feedwater heaters?

Which of the following is true for an open heater? explain: Open heater with high heat transfer capability.7.

What is the basic principle of regeneration?

1. What is the basic principle of regeneration?Explanation: in The regenerated steam from the condenser is circulated through the turbine to increase the steam temperature before entering the boiler. Description: Feed water is preheated to reduce fuel consumption and improve efficiency.

What is the purpose of the regenerative Rankine cycle?

regeneration Increases circulating heat input temperature by removing heat from boiler/fuel sources at relatively low feedwater temperatures This will exist if there is no regeneration feedwater heating.

What is the ideal regeneration cycle?

The general idea is Increases the average fluid temperature when adding heat, reduces fluid temperature during coolingThis section will introduce one such cycle – the ideal regenerative Rankine cycle, which raises the average temperature of the fluid during heating.

Which is more efficient, reheat cycle or regeneration cycle?

For a given set of operating parameters, a small increase in thermal efficiency results in a large return on investment and more power generation. …Analysis shows regeneration cycle More efficient than reheat cycling for a given set of operating conditions.

An ideal regeneration cycle is practically impossible, what is the reason behind it?

An ideal regeneration cycle is practically impossible because A heat exchanger cannot be installed inside the turbine as there is a greater chance of corrosion of the turbine blades (final stage). The thermal efficiency of an ideal regeneration cycle is equal to that of the Carnot cycle.

What are the disadvantages of regenerative feed heating?

1.3 Disadvantages of regenerative heating system: Increased cost of pipe rack engineering, but also some mechanical loss of steam input, enabling less work. The strength of the turbine is reduced due to the holes provided for extracting steam from the different stages.

Why use at least one open heater?

Why use at least one open heater? explain: Open heater used as deaerator.

Which of the following is a disadvantage of an open heater?

Which of the following is a disadvantage of an open heater?Explanation: The disadvantage is that Each heater requires a pump to handle large feedwater flows.

What is the main purpose of using an economizer in a boiler?

Instructions: Use the boiler economizer Heat a fluid to an extent that does not exceed the fluid’s boiling pointEconomizers are so named because they utilize the enthalpy in the hot fluid stream, which produces more useful enthalpy and increases the efficiency of the boiler. 11.

Which equipment uses the heat of steam to heat feed water?

superheater: A superheater is a device that converts saturated steam or wet steam into superheated steam or dry steam. Superheated steam is used in processes such as steam turbines, steam engines and steam reforming for power generation.

What is the main process of the regenerative Rankine cycle?

Ideal Regenerative Rankine Cycle

The regeneration process of a steam power plant is done in the following ways Steam is extracted (or discharged) from the turbine at various stages and sent to a heat exchanger where the feedwater is heated. These heat exchangers are called regenerators or feed water heaters (FWH).

What are the disadvantages of the regenerative Rankine cycle?

Disadvantages of regenerative power cycle: Factories have become more complex and more expensive. The addition of heaters to the circuit increases maintenance requirements. For a given power, a large capacity boiler is required.

What are the important advantages of reheating?

Advantages: The advantage of using a reheat cycle is that higher thermal efficiencyreduced feed pump power, smaller condensers, smaller boilers, longer turbine life and less fuel handling and combustion requirements.

How can we improve the efficiency of the Rankine cycle?

There are three ways to improve the efficiency of a simple ideal Rankine cycle.

1. Reduce condenser pressure. The effect of reducing condenser pressure on the efficiency of the Rankine cycle is illustrated on the Ts plot on the left. …
2. Superheat steam to high temperature. …
3. Increase boiler pressure.

What is the process of regeneration and why is it important?

regeneration is The natural process in plants and animals to replace or restore damaged or missing cells, tissues, organs or even entire body parts to function fully. Scientists are investigating the potential use of regenerative technologies in medicine, such as the treatment of various injuries and diseases.

Why reheat steam?

the quality of Steam at turbine outlet is improved by reheating i.e. x 4s > x 4’s, so there is less blade erosion because there are less water droplets in the exhaust. It can also be noted that the steam mass (x4) in the turbine exhaust increases as the reheat pressure decreases.

What is the main role of the moderator?

Inside the reactor vessel, the fuel rods are immersed in water, which acts as both a coolant and a moderator.host Helps slow down the neutrons produced by fission to maintain chain reactions. Control rods can then be inserted into the reactor core to reduce the reaction rate, or removed to increase the reaction rate.