STUDY ON ASU SUBSYSTEM CHARACTERISTIC AND ITS EFFECTS ON IGCC PERFORMANCE
DENG Shi-Min DUAN Li-Qiang GUAN Yi-Biao JIN Hong-Guang LIN Ru-Mou CAI Rui-Xian(Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100080, China)
In this paper, one typical ASU (air separation unit) is simulated with Aspen Plus model and the exergy analysis is also carried out. The characteristics of ASU subsystem including key parameters and index of power consumption are obtained. Based on that, varied flow arrangements of connecting ASU with IGCC are evaluated and the change of net efficiency of IGCC along with Xas and Xgn are revealed considering the limit of compressor stall and of maximum gas turbine output. In addition, two typical ASU flow systems, high-pressure integrated one and low-pressure independent one, are comprehensively analyzed and compared through detailed case study. The results of this paper have great value for option selection and system design of IGCC plant.