将直接空气碳捕集(Direct air carbon capture, DAC)与可再生综合能源系统结合，是实现区域碳中和的有效路径。合理的配置方法是系统稳定、经济与负碳运行的前提。常规配置方法未考虑DAC中CO2吸附、解吸两阶段过程的能耗特征差异，导致非最优或不可行的系统配置方案。为此，本文构建了面向系统优化配置的DAC吸附-解析两阶段能耗特性模型，提出考虑投资、运维、可再生能源利用、碳减排的DAC综合能源系统配置方法，获得了各设备的最佳容量及典型场景下DAC灵活吸附、解吸、停机运行策略。案例分析验证了所提出的配置方法的有效性与优越性。

Combining direct air carbon capture technology (DAC) with renewable integrated energy systems (IES) is an effective path to regional carbon neutrality. Reasonable configuration approach is a prerequisite for stable, economic and carbon-negative operation of the entire system. Conventional configuration methods do not consider the differences in energy consumption characteristics between the CO2 adsorption and desorption processes of DAC, leading to non-optimal or infeasible configurations. To this end, this paper constructs two-stage energy consumption model for CO2 adsorption and desorption of DAC system, proposing a novel configuration approach that integrates the investment, operation and maintenance, renewables utilization performance and carbon reduction. The optimal capacity of each device in IES and the flexible adsorption, desorption and shutdown operation strategies of DAC are determined. Case studies demonstrate the effectiveness and superiority of the proposed configuration approach.

国家重点研发计划项目(2021YFE0112800); 国家自然科学(51976030); 江苏省碳达峰碳中和科技创新项目(BE2022602).