Reading sample: Whitepaper – Influencing factors and measurement parameters for gas turbines and their importance for optimizing efficiency and emissions
Gas turbines in industrial applications
Thanks to their outstanding performance in the peak load range, gas turbines have proven themselves as crucial and reliable components in numerous industrial applications. Gas turbines are used especially frequently in the electrical and heat generation sector, as well as in the oil and gas industry. In industrial energy production, gas turbines ensure that consumption peaks are covered and produce heat for buildings. Frequent areas of use are gas turbine works, combined heat and power (CHP) plants and cogeneration plants. A particularly high level of energy efficiency can be achieved using a combination of gas and steam turbines. In the oil and gas industry, gas turbines are in use as mechanical drives for pumps, compressors and generators in the transportation and processing of raw materials. Gas turbines are operated with liquid and gaseous fuels such as natural gas, gasoline, diesel, heating oil or petroleum. Optimizing the fuel- and exhaust gas-intensive process to the highest level of efficiency involves a complex interaction between the exhaust gas parameters and the combustion process settings of the gas turbine – the basis for an optimum performance. For a service technician, it is important to understand the function of the combustion process and the influence of the individual measurement parameters on the performance and pollutant emission of gas turbines.
Analyzing exhaust gas concentrations correctly
The concentration of the released exhaust gases provides important information on the efficiency of the combustion and how it can be increased. CO and NOX values provide information on the current status of the system and the adherence to the emission limit values. The air input between rich and lean and the correlating combustion chamber temperature influence the emission behaviour of the gas turbine.
Challenges in commissioning, operation and servicing
In emission measurements in gas turbines, the challenge is measuring not only at very high, but also at very low gas concentrations. At the right operating point, optimally adjusted gas turbines emit only low levels of CO and NOX. However, high gas concentrations can occur, for example when the plant is started up for testing purposes. The reduction of NO2 emissions as well as the avoidance of pressure loss in the combustion chamber are also important factors for the efficient operation of the gas turbine.
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