What is reheating and regeneration of gas turbine?

Asked by: Nick Simpson  |  Last update: 18 June 2021
Score: 4.3/5 (41 votes)

Regeneration process involves the installation of a heat exchanger in the gas turbine cycle. ... This heat exchanger is used to extract the heat from the exhaust gas . This exhaust gas is used to heat the compressed air. This compressed and pre-heated air then enters the combustors.

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Correspondingly, What is reheating in gas turbine?

In a gas turbine, reheating is a process in which the hot gases coming out of the combustion chamber expands in two turbines i.e. high pressure and low pressure turbine. The hot gases firstly expands in a high pressure turbine then passes through a heat exchanger and then expands in the low pressure turbine.

Secondly, What is gas turbine regeneration?. Regenerative is a thermodynamic process that utilizes the remaining energy in the exhaust gases from the gas turbine to heat the air entering to the gas turbine. This process can be made by heat exchange between the exhaust gases and compressed air by utilizing shell and tube heat exchanger.

In respect to this, What is regeneration and reheating?

Therefore, a reheat cycle is used to increase the work output while a regenerative cycle is used to enhance the efficiency. Gas Turbine Cycle with Inter-cooling. The cooling of air between two stages of compression is known as intercooling.

What is reheat and non reheat turbine?

Non Reheat Steam Turbines. Page 1. Non reheat steam turbines are efficient, flexible and reliable machines based on a broad design platform, capable of satisfying a wide range of steam cycles, site conditions and operating modes for both 50 and 60 Hz applications.

23 related questions found

What is 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 process of reheat cycle?

In a reheat cycle, the expansion takes place in two turbines. The steam expands in the high-pressure turbine to some intermediate pressure, then passes back to the boiler, where it is reheated at constant pressure to a temperature that is usually equal to the original superheat temperature.

Is regeneration better than reheating?

Analysis shows that regenerative cycle is more efficient compare to reheat cycle for a given set of operating conditions.

Why both reheating and regeneration 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.

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.

Which fuel is used in gas turbine power plant?

Natural gas is the most preferred conventional fuel for propulsion of gas turbines. In view of this, it is often used as a reference fuel for comparison of the performance of gas turbine engines.

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.

Is it always useful to have a regenerator in a gas turbine power cycle?

Less work is required to compress cool gas than is required to compress warm gas. Therefore, a regenerator intercooler can reduce the required work input to the compressor. Thus, regenerators can be used to increase the thermal efficiencies and power outputs of gas turbines.

What is the difference between gas turbine and steam turbine?

The primary difference between steam and gas turbines is the fact that steam turbines receive power from expanding steam. Fuels such as natural gas can heat condensed water in a boiler, but it's also possible to utilize renewable thermal energy for this heating. ... This water-based cycle is the Rankine Cycle.

Why Brayton cycle is used in gas turbine?

The Brayton Cycle is a thermodynamic cycle that describes how gas turbines operate. The idea behind the Brayton Cycle is to extract energy from flowing air and fuel to generate usuable work which can be used to power many vehicles by giving them thrust.

What is the function of intercooler in gas turbine?

An intercooler is a mechanical device used to cool a gas after compression. Compressing a gas increases its internal energy which in turn raises its temperature and decreases its density. An intercooler typically takes the form of a heat exchanger that removes waste heat in a gas compressor.

What are the effects of reheating in steam turbine?

Reheating increases the efficiency by raising the mean temperature of the heat addition process, by increasing the steam temperature at the turbine inlet and also by increasing the efficiency of the expansion process in the steam turbine.

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 is the meaning of reheating?

transitive verb. : to heat (something) again : to make (something) hot or warm once more reheating leftovers in the microwave.