Table of Contents
Why does combined cycle have higher efficiency than a simple gas turbine system?
A combined-cycle power plant uses both a gas and a steam turbine together to produce up to 50\% more electricity from the same fuel than a traditional simple-cycle plant. The waste heat from the gas turbine is routed to the nearby steam turbine, which generates extra power.
What is the difference between open and combined cycle gas turbine power plants?
A CCGT comes with a heat recovery system that captures waste heat from the exhaust gas of the gas turbine. Contrary to the above system, an OCGT does not capture waste heat. Instead, this system must reject the waste heat to the environment.
Which type of gas turbine cycle gives higher efficiency?
A closed cycle gas turbine gives higher efficiency as compared to an open cycle gas turbine.
Why does a combined cycle power plant have high efficiency?
The efficiency of the cycles add, because they are powered by the same fuel source. So, a combined cycle plant has a thermodynamic cycle that operates between the gas-turbine’s high firing temperature and the waste heat temperature from the condensers of the steam cycle.
What are the disadvantages of combined cycle power plants?
Disadvantages: If you talk about the disadvantages then, there are some disadvantages of the combined cycle power plant. A single mistake can ruin the entire area around those power plants. High Maintenance cost: Maintaining such complex systems is another challenging part.
What are the disadvantages of combined cycle power plant?
The primary disadvantage of multiple stage combined cycle power plant is that the number of steam turbines, condensers and condensate systems-and perhaps the cooling towers and circulating water systems increases to match the number of gas turbines.
How can you increase the efficiency of a combined cycle power plant?
Efficiency of combined cycle power plant may be improved by reducing internal irreversibility of processes in the thermodynamic cycle of the power plant. It is necessary to transfer between working substances of gas and steam cycles considerable part of the heat, supplied in the gas cycle.