Efficiency of gas turbine is increased by

Solution(By Examveda Team)

The efficiency of a gas turbine can be increased by several methods, and one of the most effective approaches is to use a combination of these methods. Here are the options:

Option A: Reheating: Reheating involves dividing the turbine into multiple stages and adding heat to the gas between these stages. This process helps to maintain a high temperature and pressure of the working fluid, improving the overall efficiency of the gas turbine. Reheating reduces the work done per stage, which reduces the overall thermal losses.

Option B: Intercooling: Intercooling is the process of cooling the air between the compression stages of the gas turbine. By reducing the temperature of the air before it enters the combustion chamber, intercooling helps to improve the overall efficiency of the gas turbine. Cooler air is denser, allowing for higher power output.

Option C: Adding a Regenerator: A regenerator, also known as a heat exchanger, is used to recover heat from the hot exhaust gases and transfer it to the incoming air. This preheating of the air before it enters the combustion chamber reduces the amount of fuel needed to achieve the desired temperature, thereby increasing the efficiency of the gas turbine.

Option D: All of the above: All three methods mentioned above (reheating, intercooling, and adding a regenerator) contribute to increasing the efficiency of a gas turbine. Combining these methods can lead to significant improvements in the overall performance of the gas turbine.

So, the correct option is: Option D: All of the above