Advancing Clean Electric Power Technologies

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Advancing Clean Electric Power Technologies ( advancing-clean-electric-power-technologies )

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TA 4.R: Supercritical Carbon Dioxide Brayton Cycle Recuperated Brayton cycle Recuperator Shaft configuration Slugging Supercritical fluid Supercritical Rankine cycle Synchronous alternator Thermal power cycle Ultra-supercritical Rankine cycle Wound alternator A Brayton cycle in which residual thermal energy in the expanded working fluid is used to preheat the working fluid after it has been compressed and before it enters the primary heat source. In the context of a thermal power cycle, a recuperator is a heat exchanger in which the working fluid exchanges heat with itself. Residual thermal energy remaining in the working fluid after undergoing expansion is used to preheat the working fluid prior to the primary heat source. Refers to the connectivity of shafts with multiple turbomachinery components. In a single shaft configuration, the units share a single shaft and operate at the same rotational speed. In a multi shaft configuration, each unit has a separate shaft. A liquid–gas two-phase flow regime in which the gas phase exists as large bubbles separated by liquid "slugs." Slugging can lead to severe pressure oscillations within piping.50 Any substance at a temperature and pressure above its critical point, where distinct liquid and gas phases do not exist. It can effuse through solids like a gas, and dissolve materials like a liquid.50 A type of Rankine cycle in which the working fluid becomes a supercritical fluid during the cycle. For water, Tc is 374°C and Pc is 22.1 MPa. Typically, supercritical steam plants operate at pressures of 25.5 MPa or higher and temperatures of 565°C or higher. An alternator in which the waveform of generated voltage is synchronized with (directly corresponds to) the rotor speed. The frequency of output can be given as f = N * P / 120 Hz. where N is speed of the rotor in rpm and P is the number of poles.50 A thermodynamic cycle in which a working fluid is heated and then generates power. Generally restricted to steam cycles, this is a variant of the supercritical Rankine cycle in which the peak steam temperatures are typically 600-650°C. A type of alternator in which the magnetic field is generated by wound field coils that form an electromagnet.50 28 QuadrennialTechnologyReview2015

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