Why the temperature of the exhaust gases can not be too high at the turbine phase?

Why the temperature of the exhaust gases can not be too high at the turbine phase?

Exhaust temperatures of the GTs are significantly higher than the ambient temperature. The turbine expands to the atmospheric pressure in the open Brayton cycle. Hence, it is impossible to expand the working fluid under the ambient conditions.

What is the exhaust of the gas turbine used for?

They can also be run in a cogeneration configuration: the exhaust is used for space or water heating, or drives an absorption chiller for cooling the inlet air and increase the power output, technology known as turbine inlet air cooling.

Can be used as fuels in gas turbines?

Explanation: Natural gases,petrol,diesel etc can be used as fuels in gas turbines. Gas turbines requires liquids with high specific heat as fuels.

What is that temperature called to which the exhaust gases of a gas turbine are cooled to?

9. What is that temperature called to which the exhaust gases of a gas turbine are cooled? Explanation: As the maximum temperature of cooling that can be reached has to be the dewpoint of one of these gases, so the dewpoint of Sulphuric Acid [Sulphur dioxide discharge] is chosen.

What is the normal exhaust gas temperature?

around 420°C
Exhaust gases normally discharges at a temperature of around 420°C (788°F).

How do you reduce the temperature of exhaust gas?

Installing aftermarket parts to help regulate exhaust gas temperatures will extend the life of the motor and assist with increased performance.

1. Provide additional airflow to the motor by installing an aftermarket, cool air intake in place of the stock air filter.
2. Install a free-flowing, large diameter exhaust system.

How gas turbine is shut down?

The method involves cooling a gas turbine to a maintenance condition, and holding the gas turbine at full speed-no load conditions for preset time during shutdown to reduce thermal stresses in a limiting component of the gas turbine at the full speed-no load conditions.

What fuel is used in gas turbine?

One advantage of gas turbines is their fuel flexibility. They can be adapted to use almost any flammable gas or light distillate petroleum products such as gasoline (petrol), diesel and kerosene (paraffin) which happen to be available locally, though natural gas is the most commonly used fuel.

Which type of gas turbine is used in aircraft?

Turbofans are the most widely used gas turbine engine for air transport aircraft. The turbofan is a compromise between the good operating efficiency and high thrust capability of a turboprop and the high speed, high altitude capability of a turbojet.

What are the disadvantages of a gas turbine?

As a basic power supply, the gas turbine requires no coolant (e.g., water). In the early days of its development, one of the major disadvantages of the gas turbine was its lower efficiency (hence higher fuel usage) when compared to other IC engines and to steam turbine power plants.

How is exhaust gas used to generate power?

However, the energy of the exhaust gas can be used in other ways. First, it can be used to spin a power turbine that produces electricity. Secondly, it can be used to generate steam which can then be used in a gas-fired boiler to meet onboard heat demands.

Where does the thrust come from in a gas turbine?

The gas flow leaving the turbine is then accelerated to the atmosphere in an exhaust nozzle (Figure 1) to provide thrust or propulsion power. Gas turbine or jet engine thrust power is the mass flow momentum increase from engine inlet to exit, multiplied by the flight velocity. A typical jet engine is shown in Figure 2.

Which is better gas turbine or gas engine?

Compared to the gas engines, gas turbines have a significantly lower concentration of air pollutants (CO₂, NOx, SOx, particulates) in their emissions. Engines consume less fuel and emit a lower volume of gas but produce a higher concentration of pollutants.

https://www.youtube.com/watch?v=4r1-IMMS73s