Possible energy network with polygeneration system and CCS for China

On basis of adopting polygeneration systems for power and alternative fuels, capturing CO₂ with near zero energy penalties, and storing CO₂ on sites, a new kind of Energy Network can integrate energy utilization, CO₂ capture, transportation and storage synthetically. Techno-economic analysis of this solution focusing on Inner Mongolia and the Yangtze River Delta districts had been carried with comparison to the chain method for energy utilization and CO₂ sequestration. This solution can save 21.5% of energy, and reduce 35% of total costs. The adoption of advanced polygeneration systems contributes 52.2% of the total saved costs, and the integration of energy utilization and CO₂ sequestration in the Energy Network contributes 47.8%. From the aspect of CCS, the CO₂ sequestration cost in the Energy Network can be as low as 12 $/t due to the lower energy penalties of capture in polygeneration systems and the combination of CO₂ source and sink. The Energy Network exhibits attractive performance on energy saving, costs reduction for CCS, which may be a promising solution for sustainable development of China.