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Conceptual Design and Analysis: • 14 Different Configurations analyzed • 2 Turbine Types Axial Radial Inflow • V ariety of rotordynamic configurations Number of bearings (2,3,4) Location of radial bearing (straddled, overhung, cold section only, ...) Location of thrust bearing • Rotordynamic Initial analysis completed for all of the initial rotor configurations Two bearing systems appear to be unacceptable because of criticals near the operating range (design tradeoff considerations) • Initial analysis of generator stress levels • Initial aero-analysis of compressor, turbine (1R,1A,2A) • Recuperator: Preliminary cell geometry specified Developed cost model for recuperator Compared potential modifications with manufacturing capabilities Cost projections of higher temperature materials underway Detailed cell design underway • Risks and Challenges: Performance Concerns: • Recuperator effectiveness (~ 92%) and the pressure drop (~2.2%) across it • Turbine efficiency at high turbine inlet temperatures • Compressor Performance • Low parasitic losses at high efficiency point Material Limitations: • Turbine 2250oF/1232oC Inlet Temperature Stress Levels (~2000 ft/s) • Recuperator with a 1600oF/871oC inlet temperature • Combustor with a 1500oF/816oC inlet temperature Partner Risks: • Ceramic Supplier Kyocera Honeywell • Rotordynamic and Bearing Concerns: Increased bearing load Increased hot side temperatures New bearing sizes Modified bearing locations • New rotordynamic configurations 12PDF Image | Final Technical Report Advanced MicroTurbine System (AMTS) -C200 MicroTurbine -Ultra-Low Emissions MicroTurbine
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