•Testing and validation of advanced HL-class technology under real conditions at customer site
• New efficient technologies to be rolled out subsequently to existing gas turbine portfolio
• Designed to plug in to Siemens suite of digital products – running on MindSphere Siemens is paving the way for the next level of efficiency with the development of its HL-class. In June 2017, Siemens announced the company will validate the technologies of its HL-class at Duke Energy’s Lincoln County site in the United States of America.
This new machine is developed from a proven and robust SGT-8000H technology. The advanced Siemens HL-class gas turbines combine a series of new but already tested technologies and design features with the best of past experience – resulting in a technology carrier to the next level of efficiency and performance. The HL-class is clearing the way to efficiency levels beyond 63% with a mid-term goal to reach 65%.
Furthermore, Siemens is gaining speed to drive technological upgrades and competitiveness by transferring newly developed key technologies to its entire gas turbine portfolio. In the near future, all customers will benefit from further efficiency and performance increases. This approach is part of a series of activities to help
Siemens` customers compete in a rapidly changing market – working to significantly reduce lead and construction times through standardization and modularization. The new Siemens HL-class consists of three engines: SGT5-9000HL, SGT6-9000HL and SGT5-8000HL. In simple-cycle operation the air-cooled SGT-9000HLgas turbine will provide a capacity of 545 megawatts (MW) for the 50-Hertz market and 374 MW in the 60-Hertz version. SGT5-8000HL will provide 453 MW in simple cycle operation. All engines reach more than 63% combined cycle efficiency.
To achieve top performance, the turbines operate at high combustion temperatures. For this purpose, Siemens’ specialists have developed advanced combustion technologies, innovative multi-layer coatings, super-efficient internal cooling features as well as an optimized water-steam cycle. Furthermore, optimized sealings minimize cooling and air leakage. At the same time, evolutionary 3D-blading is enabling higher aero-efficiency for the compressor. Predefined and prefabricated solution elements as well as pre-selected vendors and products allow a significantly reduced construction time and a fast start for projects.
The turbines are designed to plug in to Siemens’ digital offering for plant operators and utilities alike, incorporating connectivity to MindSphere, the cloud-based Siemens operating system for the Internet of Things. MindSphere offers access to powerful analytics from Siemens and its partners – using intuitive insights in engine operation and decision support to deliver benefits to customers.
“Driven by digitalization, speed in technology development is rapidly gaining momentum in the power generation arena,” said Willi Meixner, global CEO of the Siemens Power and Gas Division. “It took us 10 years from 2000 to 2010 to increase the efficiency of our combined cycle power plants from 58 to 60%; a further six years to reach 61.5% in 2016 and now we are taking the next step to 63% and beyond. That´s amazing. But we know that speed and efficiency alone are not sufficient – reliability and cost effectiveness of our solutions as well as partnership, support in financing and insurability are also key to our customers,” said Meixner.
To minimize customer risk, Siemens is following an extensive and thorough validation and testing approach. After component testing and prototype testing in Siemens-owned facilities, the company is now pursuing validation under real field conditions.
Executive Vice President for Power and Gas in Siemens Sub-Saharan Africa says: “This is indeed a positive development for Africa in particular where electrification still remains a priority. We recently conducted an African Digitalization Maturity report and one of the key learnings bode well for this machine as it comes prepared for digitalization developments.”
Pistauer adds that as much as renewable energy continues to grow globally, gas fired power generation will continue to play a critical role. Our innovation initiatives are anchored in the principle of a diversified energy mix. Gas with its flexibility and efficiency is a good source of energy to complement the intermittency of renewables. The intermittency of renewables is a key concern for Eskom and it is through innovations such as the HL-Class that the business case for Gas To Power as identified the South African government’s Integrated Resource Plan become stronger.