Possible energy network with polygeneration system and CCS for China

Abstract

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.