不同配置下太阳能驱动直接空气捕集的技术经济性评估

Abstract The growing concentration of atmospheric carbon dioxide has intensified climate change concerns, prompting the need for scalable and sustainable carbon removal technologies. Direct air capture (DAC) is a promising solution, yet it is hindered by high energy demands and fossil fuel dependency. This study presents a comprehensive techno-economic and exergoeconomic analysis of solar-integrated DAC systems to assess their performance under four different configurations: DAC powered by photovoltaic (PV) panels alone, DAC with PV and parabolic trough collectors (PTC), DAC with PV and a single solar tower, and DAC with PV and a modular solar tower. The DAC process is simulated in Aspen Plus V11 using a hydroxide-carbonate absorption cycle. Among the evaluated scenarios, the DAC + PV + Single Tower system achieves the lowest levelized cost of DAC (LCOD) at 276.21 $/ton, representing a 6.7 % cost reduction compared to the PV-only configuration. Furthermore, this scenario demonstrates the highest exergoeconomic factor (19.53 %), highlighting superior cost-effectiveness and thermodynamic performance. While the PV + PTC configuration exhibits the highest exergy efficiency (6.77 %), its cost savings are marginal compared to tower-based systems. These findings underscore the potential of solar-assisted DAC systems, particularly tower-integrated configurations, as a viable and economically attractive solution for large-scale atmospheric carbon dioxide removal.