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The basic operation of the gas turbine is a Brayton cycle with air as the working fluid: atmospheric air flows through the compressor that brings it to higher pressure; energy is then added by spraying fuel into the air and igniting it so that the combustion generates a high-temperature flow; this high-temperature pressurized gas enters a ...
In a simple cycle gas-turbine, also known as open-cycle gas-turbine (OCGT) generators, hot gas drives a gas turbine to generate electricity. This type of plant is relatively cheap to build and can start very quickly, but due to its lower efficiency is at most only run for a few hours a day as a peaking power plant. [8]
Propellant is burned in a gas generator (or "preburner") and the resulting hot gas is used to power the propellant pumps before being exhausted overboard and lost. Because of this loss, this type of engine is termed open cycle. The gas generator cycle exhaust products pass over the turbine first. Then they are expelled overboard.
One is the Joule or Brayton cycle which is a gas turbine cycle and the other is the Rankine cycle which is a steam turbine cycle. [5] The cycle 1-2-3-4-1 which is the gas turbine power plant cycle is the topping cycle. It depicts the heat and work transfer process taking place in the high temperature region.
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Fuels such as natural gas or oil can also be burnt directly in gas turbines (internal combustion), skipping the steam generation step. These plants can be of the open cycle or the more efficient combined cycle type. The majority of the world's thermal power stations are driven by steam turbines, gas turbines, or a combination of the two.
The LMS100 PA produces approximately 100 MW at an efficiency of around 46% LHV in open cycle operation. It is currently the largest and most efficient aero-derivative gas turbine. It is able to produce full rated power in under 10 minutes. [citation needed] The LMS100 comprises a low-pressure compressor, an intercooler, a supercore and a power ...
The gas turbine cycle is used for all modern gas turbine and turbojet engines, however simple cycle turbines are often recuperated to improve efficiency and these recuperated turbines more closely resemble Ericsson's work. Ericsson eventually abandoned the open cycle in favor of the traditional closed Stirling cycle.