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Bearing Loading = 1.6lbf/in^2 Minimum de-rated power = 120 kW Minimum design power (production) = 140 kW Cost Model: • Assumptions Based on production volume of 500 units Ceramic costs are comparable to metallic cost Used historical C30 and C60 cost information Functional variation based on part usage • Linear with kW • Function of diameter • Fixed Proposal Cycle Assumptions: Round 1: • Compressor Specific Speed = 0.84 => Efficiency = 81% • Radial Turbine, Turbine Efficiency = f(U/V) • Maximum turbine rotor tip diameter 6.5 inches; Umax = 2100 ft/s • Recuperator sizing based on an equivalent number of current recuperator cells. • Recuperator Effectiveness limited to 0.92 • Generator Efficiency = 96% • Generator pressure drop = 0.1 inH20 • Generator temperature rise = 4F • Combustor pressure drop = 2% • Bearing cooling = 1.5% • Mechanical Efficiency = 99% (bearing losses only) • Turbine nozzle to compressor discharge HT computed based on fixed dT from compressor discharge to recuperator inlet of 15F • Fixed exhaust dome to ambient heat transfer of 2kW Round 2: • Assumptions Compressor Specific Speed = 0.80 => Efficiency = 81% Maximum turbine rotor tip diameter 8.0 inches; Umax = 2000 ft/s Maximum turbine efficiency = 85% No heat transfer Recuperator cost a function of temperature • Models 1750F TIT 1300F TET 1500F TET 2300F TET Round 3: 6PDF Image | Final Technical Report Advanced MicroTurbine System (AMTS) -C200 MicroTurbine -Ultra-Low Emissions MicroTurbine
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