Sage-Tips

Why is intercooling done in gas turbine?

Gas Turbine Cycle with Inter-cooling The cooling of air between two stages of compression is known as intercooling. This reduces the work of compression and increases the specific output of the plant with a decrease in the thermal efficiency.

What is the purpose of reheating and recooling in Brayton cycle?

Work output from the turbine, operating between two specific pressure levels, could be increased by expanding the working fluid i.e. gas or air in stages and reheating the working fluid between two successive stages.

What is the purpose of intercooling in Brayton cycle?

When intercooling and reheating are used, the working fluid leaves the turbine at a higher temperature and the compressor at a lower temperature. This makes regeneration more attractive.

What is reheating and regeneration of gas turbine?

Reheating in Gas Turbine: Reheating is a method of increasing the mean temperature of heat reception. In this, the gas is again heated after it has expanded in the gas turbine.

Is intercooling and reheating increase the efficiency?

For intercooled cycles, efficiency is improved by reducing the average temperature of heat rejection from the cycle. On the other hand, reheating increases cycle efficiency by increasing the average temperature of heat addition to the cycle.

What is the purpose of reheat cycle?

The purpose of a reheating cycle is to remove the moisture carried by the steam at the final stages of the expansion process. In this variation, two turbines work in series. The first accepts vapor from the boiler at high pressure.

What is the advantage of adding intercooling reheating and regeneration on Brayton cycle?

Therefore reheat, and regeneration is complementary. They are usually used together to increase the thermal efficiency of a gas turbine. Significant increases in the thermal efficiency of gas turbine power plants can also be achieved through inter-cooling.

How does intercooling improves Brayton cycle efficiency?

The intercooling increases the density of the charge so increasing the amount of air for the burning process.

What is the process of reheating?

Reheating is a method of improving Rankine cycle efficiency which consists of inter-stage heating of the expanding steam. After the first stage of expansion which typically reduces initial steam pressure by one-fourth, the steam is heated up (or close) to the maximum heat source temperature.

What is intercooling in gas turbine Mcq?

It is the stage of multi-compression in a gas turbine. After the compression of gas in the first compressor, its pressure and temperature are increase this gas is passed through the intercooler where its temperature decrease. The intercooling process is done by passing an extra amount of water or air.

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 main purpose for adding reheat process to the cycle?

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.

Can intercooling and reheat increase the thermal efficiency of a turbine?

By itself, they would not necessarily increase the thermal efficiency, however, when intercooling or reheat is used in conjunction with heat regeneration, a significant increase in thermal efficiency can be achieved and the net work output is also increased. This requires a gas turbine with two stages of compression and two turbine stages.

What is rereheat and intercooling?

Reheat and intercooling are two such schemes. The basic objective of introducing intercooling and reheat is to increase specific power and thermal efficiency. When comparing ideal and real cycles, the largest sources of loss in a gas turbine engine are those arising from the turbomachinery and the need to cool the turbine blades.

What is intercooling in thermodynamics?

Intercooling additionally includes the utilization of a heat exchanger. The intercooler is a type of heat exchanger where it is used to cool the compressor gas amid the compression process. Reheating in thermodynamic process refers to an approach to build turbine work without variation in the compressor work from which the turbine is developed.

What is the difference between reheat and regeneration in a gas turbine?

On the other hand, the temperature at the exit of the turbine (low pressure stage) is higher with reheat than without reheat, so there is the potential for heat regeneration. Therefore reheat and regeneration are complementary, they are used usually together in order to increase the thermal efficiency of gas turbine.