计及直接空气碳捕集吸附-解吸特性的负碳综合能源系统优化配置方法研究

Optimal Configuration Approach of Carbon-negative Integrated Energy System Considering Adsorption and Desorption Characteristics of Direct Air Carbon Capture

为解决常规配置方法无法反映直接空气碳捕集(Direct air carbon capture, DAC)系统CO_(2)吸附-解吸两阶段运行特性差异的问题,构建了可反映吸附-解吸两阶段CO_(2)传质及能耗特征差异的DAC系统模型,进而提出考虑投资成本、可再生能源利用和碳减排的DAC综合能源系统配置优化方法,获得了各设备的最佳容量及典型场景下DAC系统灵活吸附、解吸和停机的运行策略。案例分析验证了所提方法的有效性与优越性,相比于常规配置方法,本文所提配置方法能够实现区域碳中和目标,并使年总成本降低8.70%。

To address the issue that the conventional configuration approach cannot reflect the differences in two-stage operation characteristics of CO_(2) adsorption and desorption in direct air carbon capture(DAC)system,this paper constructed a DAC system model that can reflect the differences in CO_(2)mass transfer and energy consumption characteristics between adsorption and desorption stages.Then,a con-figuration optimization approach considering investment,renewable energy utilization and carbon reduction was proposed for DAC integrated energy system(IES).The optimal capacity of each equipment and the operating strategies for flexible adsorption,desorption and shutdown of the DAC system in typical scenarios were obtained.Case studies validate the effectiveness and superiority of the proposed configuration approach,compared with the conventional configuration approach,the configuration approach proposed in this paper achieves regional carbon neutrality goals and reduces annual total costs by 8.70%.