Abstract
Issues of improving the efficiency of combined cycle gas turbines (CCGT) recovery type have been presented. Efficiency gas turbine plant reaches values of 45 % due to rise in temperature to a gas turbine to 1700 °C. Modern technologies for improving the cooling gas turbine components and reducing the excess air ratio leads to a further increase of the efficiency by 1-2 %. Based on research conducted at the Tomsk Polytechnic University, it shows that the CCGT efficiency can be increased by 2-3 % in the winter time due to the use of organic Rankine cycle, low-boiling substances, and air-cooled condensers (ACC). It is necessary to apply the waste heat recovery with condensation of water vapor from the flue gas, it will enhance the efficiency of the CCGT by 2-3 % to increase the efficiency of the heat recovery steam boiler (HRSB) to 10-12 %. Replacing electric pumps gas turbine engine (GTE) helps to reduce electricity consumption for auxiliary needs CCGT by 0.5-1.5 %. At the same time the heat of flue gas turbine engine may be useful used in HRSB, thus will increase the capacity and efficiency of the steam turbine.
Highlights
Combined cycle gas turbine (CCGT) unit of utilization type in the foreseeable future will be the main power generating units when operating on natural gas
This is due to: high efficiency, which has already reached more than 60 %; low cost of construction and commissioning of a small period of operation, which is about 1.5-2 times lower than that for steam-turbine power units of supercritical pressure; low consumption of process water, which is three times lower per unit of power output than in the steam-turbine thermal power plants (TPP); less impact on the environment due to lower emissions [1] into the atmosphere and heat and water; greater maneuverability when compared to steam turbine plants
By changing the electric pump turbine engine (GTE), you can reduce the cost of electricity for own needs by 0.5-1.5 At the same time the heat of flue gas turbine engine can be useful in heat recovery steam boiler (HRSB), which will increase the capacity and the efficiency of steam turbine plant
Summary
Combined cycle gas turbine (CCGT) unit of utilization type in the foreseeable future will be the main power generating units when operating on natural gas. This is due to: high efficiency, which has already reached more than 60 %; low cost of construction and commissioning of a small period of operation, which is about 1.5-2 times lower than that for steam-turbine power units of supercritical pressure; low consumption of process water, which is three times lower per unit of power output than in the steam-turbine thermal power plants (TPP); less impact on the environment due to lower emissions [1] into the atmosphere and heat and water; greater maneuverability when compared to steam turbine plants. Consider the most promising ways of increasing the efficiency of the CCGT in the basis of the analysis of foreign and Russian scientific literature
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
