- What is the purpose of regeneration cycle?
- What is the basic principle of regeneration?
- Is a Carnot cycle reversible?
- What regeneration means?
- What do you understand by ideal regenerative cycle Why is it not possible in practice also give actual regenerative cycle?
- What is the efficiency of Rankine Cycle?
- What is effective regeneration?
- Why are more than 2 reheats not used in practice?
- What is regeneration in mechanical?
- How many heaters are used in practical regenerative steam cycle and why?
- What are the effects of regenerative Rankine Cycle?
- What is ideal regenerative Rankine Cycle?
- What does the regenerative system on a gas turbine do?
- What are the main processes not components in the regenerative Rankine Cycle?
- What is the air standard cycle for a gas turbine called?
- What do you understand by ideal regenerative cycle?
- What are the advantages of regenerative cycle over simple Rankine Cycle?
- What are the examples of regeneration?
What is the purpose of regeneration cycle?
Advantages of Regeneration cycle: Heat supplied to boiler becomes reduced.
Thermal efficiency is increased since the average temperature of heat addition to the cycle is increased.
Due to bleeding in the turbine, erosion of turbine due to moisture is reduced..
What is the basic principle of regeneration?
1. 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.
Is a Carnot cycle reversible?
The Carnot heat-engine cycle described is a totally reversible cycle.
What regeneration means?
1 : an act or the process of regenerating : the state of being regenerated. 2 : spiritual renewal or revival. 3 : renewal or restoration of a body, bodily part, or biological system (such as a forest) after injury or as a normal process.
What do you understand by ideal regenerative cycle Why is it not possible in practice also give actual regenerative cycle?
Explanation: For both the cycles, efficiency is given by 1 – (T2/T1). Explanation: These indiate that the ideal regenerative cycle is better than the Rankine cycle but it is not practicable. Explanation: These reasons result in the ideal regenerative cycle being not used practically.
What is the efficiency of Rankine Cycle?
In modern nuclear power plants, which operate the Rankine cycle, the overall thermal efficiency is about one-third (33%), so 3000 MWth of thermal power from the fission reaction is needed to generate 1000 MWe of electrical power.
What is effective regeneration?
It was found that increasing of regeneration effectiveness results in an increase in the output power of the cycle. It was also found that the cycle thermal efficiency increases with increasing of the regenerative effectiveness. The effect of ambient air temperature was also predicted.
Why are more than 2 reheats not used in practice?
Why don’t we use more than two reheats? Explanation: The mechanical stresses increases in much higher proportion than the pressure because of the prevailing high temperature. Explanation: The cycle efficiency is a function of the ratio of reheat to initial pressure.
What is regeneration in mechanical?
Regeneration in thermodynamics process refers to a method where the certain quantity of heat abstracted from the steam is utilized to heat the water. The regeneration process occurs between the stages of turbine and pump respectively. Using regeneration, the efficiencies of thermodynamic cycles can be improved.
How many heaters are used in practical regenerative steam cycle and why?
The device where the feedwater is heated by regeneration is called a regenerator, or a feedwater heater (FWH). Most modern steam power plants use between 5-8 feedwater heaters.
What are the effects of regenerative Rankine Cycle?
Regeneration improves the cycle efficiency by increasing the initial feed water temperature before the water, water enters the boiler and also helps in controlling the large the large flow rate of steam at the turbine exhaust.
What is ideal regenerative Rankine Cycle?
The ideal regenerative Rankine cycle Heat is transferred to the working fluid during process 2-2 at a relatively low temperature. This lowers the average heat- addition temperature and thus the cycle efficiency. In steam power plants, steam is extracted from the turbine at various points.
What does the regenerative system on a gas turbine do?
Regenerators can be used for exhaust-gas heat exchange or for intercooling in gas-turbine systems. As an exhaust-gas heat exchanger, a regenerator recovers heat from the exhaust and uses it to preheat the compressed air before the compressed air enters the combustor.
What are the main processes not components in the regenerative Rankine Cycle?
In a real power-plant cycle (the name “Rankine” cycle is used only for the ideal cycle), the compression by the pump and the expansion in the turbine are not isentropic. In other words, these processes are non-reversible, and entropy is increased during the two processes.
What is the air standard cycle for a gas turbine called?
The Joule cycle5 Joule (or Brayton) Cycle. The Joule cycle is the air-standard cycle which describes the processes in the gas turbine. The Joule cycle has constant pressure combustion and constant pressure heat rejection.
What do you understand by ideal regenerative cycle?
This section will introduce one such cycle – the ideal regenerative Rankine cycle, which increases the fluid average temperature during the heat addition process. … This process is called regeneration and the heat exchanger where heat is transferred from steam to feedwater is called a regenerator, or a feedwater heater.
What are the advantages of regenerative cycle over simple Rankine Cycle?
The thermal efficiency is improved because average temperature of heat addition to the cycle is increased. The Heating rate is reduced. The LP turbine blade height can be reduced because steam flow at lower stage is reduced. The steam condenser size can be reduced.
What are the examples of regeneration?
Examples of Regeneration in NatureRegrowing Limbs and Tails. Lizards are famous for being able to regrow their tails. … Organs. In addition to being able to regrow its limbs and tail, a rare type of Mexican salamander can regrow its heart, brain, and more. … Antlers and Teeth. … Entire Bodies.May 5, 2019