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Siemens breakthrough in 3D printing gas turbine low pollution combustion chamber

Date: 2018-08-15
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Guide: August 8, Siemens announced a further milestone in the 3D printing technology, the company successfully for the SGT-A05 aviation modified GT 3D print a dry low emission DLE premix, and successfully tested, the results show that the 3D print low pollution combustion chamber can significantly reduce the emissions of CO, Siemens said this achievement will further consolidate the leading position of Siemens in 3D printing technology.

Siemens breakthrough in 3D printing gas turbine low pollution combustion chamber

Vladimir Navrosky, chief technical officer of Siemens power generation division, said: " this is another good example of how 3D printing technology can completely change our industry and provide our customers with real benefits and value, especially when they want to further reduce emissions to meet environmental goals, we can use 3D printing technology to provide better flexibility in the design, manufacture and maintenance of components. "

The achievement of manufacturing specific gas turbine components using 3D printing technology is remarkable, from conceptual design to engine testing, it takes only 7 months to develop and ensure that parts meet stringent tolerances and can work long hours under load and temperature. The DLE of gas turbines is very complex and involves more than 20 parts in foundry and assembly using traditional manufacturing methods.

By using qualified nickel super alloys as 3D printing material, Siemens only needed 2 parts and reduced the delivery cycle by about 70 %. Siemens said that the 3D printing of DLE premixer enables Siemens not only to simplify the complexity in the production process and reduce the external dependence in the supply chain, but also to improve the geometry of parts and components well so as to realize better fuel-air mixing.

The first engine test of the 3D printing dle premixer was recently completed. the part was printed in 3D at the Siemens enrichment manufacturing center in Fenspon, Sweden, the test results showed that the part performed well during the start-up phase of the gas turbine and showed no problems, it was also successfully completed in the fuel switching process from diffusion combustion to premix combustion, there was no combustion pulsation or noise, even no need to modify the control strategy, and CO emission reduction and full load allowance were achieved. Siemens said that these good results proved once again that Siemens is committed to 3D printing and mass production of highly complex parts.

This time, Siemens for the specific model for the aviation gas turbine SGT-A05 DLE solution, through advanced lean premixed combustion technology, can significantly reduce CO and NOx emissions, and no need to water. This will greatly enhance the convenience of applications and reduce the associated operating costs of water treatment. Siemens said that the company's DLE solution would not affect the original rapid load adjustment characteristics of the aircraft, more than 120 units have successfully used the technology to reduce NOx and CO emissions, the cumulative operation of 3.9 million hours (as of February 2018).

 

Douglas will ham, chief engineer of Siemens SGT-A05 gas turbine, said: " now, with 3D printing technology, we have the opportunity to further reduce the CO and NOx emissions of the gas turbine. "

    Last year, Siemens completed the first full load test of a gas turbine blade that was fully designed and produced using 3D printing technology. Earlier this year, a 3D printed part of Siemens was installed in an industrial turbine unit of the customer. At the beginning of 2017, Siemens also realized 3D printing parts in the nuclear power plant: the first commercial installation and safe operation of the impeller of a fire pump. The SGT-80 combustion chamber and SGT-750 combustion chamber repaired by Siemens using 3D printing technology have accumulated successful commercial operation for more than 30,000 hours, all these combustion chamber components are operated under very high load and temperature environment.

 




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