Semiclosed Brayton cycle power system with direct combustion heat transfer

摘要

A semiclosed diesel fueled Brayton cycle power system is provided using CO₂ and steam as the working fluid. Combustion occurs in a combustor between diesel fuel and O₂ with CO₂ present as a diluent. During combustion, a heated, high pressure working fluid of CO₂ and steam is formed. The heated working fluid is expanded in a turbine and power is withdrawn from the fluid. The fluid is then used in a regenerator to heat cooler, compressed CO₂ before the compressed CO₂ is transferred to the combustor. The expanded working fluid is cooled conventionally by seawater in a cooler, condensing steam in the working fluid to water. The water is separated from the gaseous CO₂. The gaseous CO₂ is recycled, and the water is used to backfill the system's diesel fuel tank.