This paper summarizes progress on Siemens Westinghouse’s Advanced Turbine Systems (ATS) Program. The ATS program, which is supported by U.S. Department of Energy, Office of Fossil Energy, has the ultimate objective of introducing into the utility market electricity generating systems capable of achieving greater than 60% LHV based net plant thermal efficiency, less than 10 parts per million NOx emissions, 10% electricity cost reduction and state-of-the-art reliability-availability-maintainability. Work has been in progress over the last few years on developing the required advanced technologies and designing the W501ATS gas turbine. The main thrust of the technology development effort was in the areas of compressor aerodynamics, turbine aerodynamics, heat transfer/cooling, sealing, combustion/emissions, single crystal casting, materials, and coating systems. These technologies were incorporated into the W501ATS engine design to ensure that the ATS Program goals will be achieved.

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