超临界CO2循环具有潜在的高效率优势，有望作为新型的动力循环系统用于火电、聚光型太阳能热发电、核电等领域，而材料性能是决定循环效率的关键因素。本文基于当前超超临界发电机组材料的最高性能，设计了火力发电和聚光型太阳能热发电超临界二氧化碳循环系统两套方案，并按再压缩循环模式制定了二次再热运行参数，对超临界二氧化碳循环的效率极限水平进行了分析。结果表明，两套参数下的超临界二氧化碳循环都表现高效率特点，并显著高于现有的蒸汽循环发电系统的效率水平。基于现有材料，采用超临界二氧化碳循环有望获得满意的应用价值。
Supercritical carbon dioxide cycle is expected to be applied as a novel power cycle in fields of fossil-fired power, concentrated solar power, and nuclear power due to its potential advantage of high efficiency. Material property is a key factor for cycle efficiency. Two proposals for fossil-fired power and concentrated solar power were designed based on the highest property of current ultra-supercritical power plant materials, and double-reheat operation conditions were set for recompression mode. The extreme efficiency of supercritical carbon dioxide cycle was analyzed. The results showed that the two sets of parameters both exhibited high efficiency characteristics and exceeded the efficiency level of the steam cycle power system. Based on the current available materials, supercritical carbon dioxide cycle may have satisfying application value.
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