13 Feb '18, 2pm

Meet the new #HLClass #gasturbines w/ efficiency over 63% & planned to reach 65%

The HL-class’ combined cycle efficiency of over 63 percent is impressive. “In order to increase efficiency and improve performance, gas turbines have to be operated at even higher combustion temperatures – that’s the key,” explains Zhao. “We identified five levers to make higher firing temperatures possible.” Thus, his team developed an advanced combustion system that allows for higher firing temperatures, and at the same time more operational flexibility. Innovative, heat-resistant multi-layer coatings have been used to protect the blade material against the increased heat. But for the blades, Zhao points out, the inner values prove just as important: Superefficient internal cooling features have been engineered to improve the cooling process and hence efficiency. Furthermore, optimized sealing minimizes the leakage of cooling air. Finally, evolutionary 3D blading improve...

Full article: https://www.siemens.com/customer-magazine/en/home/energy/...

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