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Title: Power Generation Enhancement in a Solar Energy and Biomass-Based Distributed Energy System using H2O/CO2 Hybrid Gasification
题目：利用H2O/CO2混合气化强化太阳能和生物质分布式能源系统的发电性能
Authors: WU Haifeng, LYU Yan, WANG Ruixiang, XU Rongji, QU Wanjun, LIU Qibin
作者：吴海峰，李晓琳，王瑞祥，徐荣吉，曲万军，刘启斌
单位：北京建筑大学，东莞理工学院，中国科学院工程热物理研究所
Journal of Thermal Science, 2024, 33(5): 1657-1671.
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摘要
Abstract: A new solar energy and biomass-based distributed energy system using H2O/CO2 hybrid gasification is proposed, and their complementarity to enhance the system’s energy efficiency is investigated and shown. In the system, concentrated solar energy is used to provide heat for biomass gasification; two gasifying agents (H2O and CO2) are adopted to enhance syngas yields, and the produced solar fuel is further burned for power production in a combined cycle plant. Results show that CO share in gasification products is remarkably increased with the increment of CO2/H2O mole ratio caused by the boudouard reaction with the consumption of fixed carbon, while the H2 share is decreased; the optimal solar-to-fuel efficiency, 27.88%, is achieved when the temperature and CO2/H2O mole ratio are 1050°C and 0.45, respectively. The emission reduction rate of CO2 in the system under design conditions is reduced by 2.31% compared with that using only H2O agent. The annual power production of the system is increased by 1.39%, and the thermodynamic and environmental performances are significantly improved. Moreover, an economic assessment is conducted to forecast the technical feasibility of the hybrid gasification technology. This work provides a promising route to improving the thermochemical utilization efficiency of solar energy and solid fuel.
摘要：多能互补的分布式能源系统是解决当前日益严峻能源与环境问题的主要技术之一。本文在原有研究工作基础上提出了太阳能与生物质热化学互补的分布式能源系统，系统利用H2O/CO2混合气化方式进一步强化了太阳能与生物质的互补性在系统性能上提升作用。系统中，集中太阳能提供生物质气化需要的热量，同时两种气化剂用于提高合成气的产量，所产的太阳能燃料进一步在联合循环中燃烧发电。结果显示，随着气化剂CO2/H2O比例增加，由于Boudouard反应的作用合成气中CO份额明显加大，相反H2份额有所降低，计算得到的最优太阳能燃料转化效率为27.88%，此时CO2/H2O为0.45。在设计工况条件下，相较于单H2O气化剂，系统的CO2排放减少率为2.31%，系统的全年发电量增加了1.39%，系统的热力学和环境效益都得到了明显的改善。另外，本文还对系统的经济行进行了评估，为提高太阳能和固体燃料的热化学利用效率提供了一种新的途径。
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引用格式
WU Haifeng, LYU Yan, WANG Ruixiang, XU Rongji, QU Wanjun, LIU Qibin, Power Generation Enhancement in a Solar Energy and Biomass-Based Distributed Energy System using H2O/CO2 Hybrid Gasification, Journal of Thermal Science, 2024, 33(5): 1657-1671.
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