| Autor: |
Enrico Gottardo, Giulio Mori, Sergio Rizzo, Alessia Bulli, Carlo Piana, Marco Alecci, Domenico Zito, Roberto Rio |
| Rok vydání: |
2013 |
| Předmět: |
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| Zdroj: |
Volume 1B: Combustion, Fuels and Emissions. |
| Popis: |
The paper describes the experience made on the first, recent application of the fuel staging technology on AE94.3A gas turbine engine. The experience started in the frame of combustion upgrade projects by the beginning of 2011 when some conceptual ideas rose. The most effective solution was found in the application of radial fuel staging through the modification of an existing, dual fuel, diagonal swirler. CFD calculation was carried out in order to evaluate numerically the differences that the introduction of the radial fuel staging would have brought in comparison with the standard, reference configuration. After that one promising solution was selected and applied to a prototype, the test phase started. The experimental test was initially performed at the engine conditions on a high pressure test rig. The rig architecture was designed to be as representative as possible of the GT annular combustion chamber. The rig was equipped with the most advanced instrumentation in order to monitor and store all the main parameters of the burner during the test. High pressure tests showed a good agreement with the CFD calculation and an effective capability of the prototype to stage the fuel by generating a “co-pilot” flame. The word “co-pilot” was coined for the behaviour of the resulting flame to act as a second pilot in supporting and stabilizing the main premix flame. The on site validation was carried out on Enel La Casella GT1 power plant, downstream the upgrade of the gas turbine with the last recent AE94.3A model. The validation phase was performed according to two separate sessions: the first one using the standard, reference burner solution and the second one with the radial staged configuration. The advantage of the fuel staging technique was twofold. The first one was concerning the minimum environmental load: the contribution of the fuel staging was approximately 7 MW. The second one was concerning the global performance of the whole combined cycle power plant at the base load. It was possible to increase turbine inlet temperature of about 30 °C and the GT power output of about +7% in comparison with the standard, reference burner solution. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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