Siemens HL-class Paving the way for Next Level of Efficiency
(Room Lehar 2)
19 Jun 18
2:00 PM
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3:30 PM
Tracks:
Track 2: Repositioning Conventional Power Generation
Siemens presents the new HL-class which is an evolutionary development step from proven H-class design. With the HL-class development Siemens is pushing the efficiency beyond 63% with a clear roadmap to efficiency levels of 65%. The HL-class is a portfolio development consisting of 3 engines: The 9000HL for the 50Hz & 60Hz markets and a 50 Hz 8000HL engine. The engines are designed for highest operational reliability and flexibility to fulfil the requirements of base load units but also to be a perfect fit to energy systems with a rapidly increasing share of fluctuating renewables e.g. by allowing gas turbine ramp rates of up to 85 MW/min. The new HL-class is based on the reliable engine architecture of the SGT-8000H series with design features proven since years in operation. Among these are Hydraulic Clearance Optimization, which brings high efficiency due to tip-clearance optimization and immediate restart at hot engine conditions, single tie-bolt/Hirth serration rotor design, which is very service friendly, reliable air-cooled 4-stage turbine design concept and a can-annular combustion system. For the HL-class, Siemens continued with its proven approach to develop new gas turbines utilizing key technologies, e.g. an advanced combustion system, innovative multi-layer TBC and super-efficient internal cooling features for turbine blades and vanes. In addition, advanced 3D blading was developed for the compressor resulting in higher aero-efficiency. A free standing, internally cooled turbine blade 4 reduces exhaust losses. Testing and validation is an integral part of the Siemens gas turbine development. The key technologies developed for the HL-class have been thoroughly tested at Siemens owned test facilities. The HL-class is designed to plug in to Siemens’ digital offering. With the HL-class Siemens can offer its customers improved performance and availability, lower maintenance costs, higher operational flexibility and hence lower LCOE.