Conceptual Design of Supercritical O2-Based PC Boiler. Final Report.

[摘要] The objective of the system design and analysis task of the Conceptual Design of Oxygen-Based Supercritical PC Boiler study is to evaluate the effects of oxygen firing on supercritical PC boiler design, operation and system performance. Simulations of the oxygen-fired plant with CO2 sequestration were conducted using Aspen Plus and were compared to a reference air-fired 460 MWe plant. Flue gas recycle is used to control the flame temperature and resultant wall temperature in the O2-fired PC. Parametric trade-off studies were made to determine the effect of flame temperature on system efficiency. The degree of improvement in system performance of various modifications was investigated. The objective of the advanced oxygen separation system integration task of the study is to evaluate the benefits, effects, and limitations of the integration of advanced oxygen separation technologies into a supercritical O2-fired PC. Simulations of the power generation unit, oxygen separation unit, and CO2 sequestration system were conducted using the Aspen Plus software. The improvement of the O2-fired PC system performance incorporating the Oxygen Ion Transport Membrane (OITM) and Ceramic Auto-thermal Recovery (CAR) were investigated. A parametric study was conducted to determine the sensitivity of the design and performance to various variables. Compared to the other CO2 removal and sequestration technologies, the oxygen-fired PC integrated with OITM shows substantially less CO2 removal penalty. The CO2 removal penalty of the oxygen-fired PC integrated with CAR is between cryogenic air separation and OITM.

[发布机构] Technical Information Center Oak Ridge Tennessee

[学科分类] 工程和技术（综合）

[关键词] Boilers;Design criteria;Supercritical flow;Steam turbines;Cryogenics