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本文提出了新的CO_2近零排放中低温太阳能化石能源互补系统(ZE-SOLRGT)并对其进行了热力性能分析。该系统在SOLRGT系统基础上引入纯氧燃烧,构成以水为工质的准联合循环。中低温太阳能集热与水蒸发过程相集成,改善了换热匹配,增大了工质流量,提高了输出功与热效率;并通过热化学反应品位得以提升,最终借由燃机循环实现高效热功转换。系统以低能耗实现了CO_2近零排放。研究表明ZF-SOLRGT相对SOLRGT尾气排放(火用)损减少了50.5%,热效率提高了3.6%,实现了CO_2分离与能源高效利用的一体化集成。
In this paper, we propose a new near-zero CO 2 -fired solar energy fossil energy complementary system (ZE-SOLRGT) for CO 2 emission and analyze its thermal performance. The system introduces pure oxygen combustion based on the SOLRGT system to form a quasi-combined cycle with water as the working fluid. Low-temperature solar thermal collector and water evaporation process integration, improved heat exchange matching, increased working fluid flow and improve the output work and thermal efficiency; and through the thermochemical reaction grade can be improved, and ultimately by the gas turbine cycle to achieve high efficiency heat Power conversion. The system achieves nearly zero CO 2 emission with low energy consumption. The results show that the exergy loss of ZF-SOLRGT is reduced by 50.5% and thermal efficiency is increased by 3.6% compared with that of SOLRGT, which achieves the integration of CO 2 separation and energy efficient utilization.