Optimal Energy Storage System and CCS Accelerate Energy Decarbonization : A Case Study of Inner Mongolia, China

抄録

Abstract: One of the crucial prerequisites to realize the goal of carbon neutrality is the integrated energy system (IES) to achieve a net zero emissions target. Energy storage systems(ESSs) provide an effective way to address the volatility and instability of renewable energy systems (RESs). Carbon dioxide (CO₂) capture and storage (CCS) technology is an efficient method to reduce carbon emissions from coal-fired power plants (CFPPs). In terms of IES, the total costs, emission reduction potential and marginal abatement cost (MAC) are considered as significant indicators. This study aims to explore the emission reduction effects and economic analysis of future IES from the perspective of life-cycle carbon emissions and costs through the deployment of optimized ESSs (including short-term and long-term energy storage) and different CCS retrofitting rates. Taking the energy system of Inner Mongolia, China, as an example, based on future energy goal and emission reduction potential, our results indicate that the deployment of CCS and EESs could reduce emission by approximately 26 – 128 million tons in 2030 under current energy plans, power generation cost may increase by 8 billion to 46 billion CNY, this is mainly because that ESSs have higher cost to compare CCS retrofitting cost, which significantly increased the total IES cost. Moreover, research results also show that the MAC value of CCS retrofitting is the lowest under different energy scenarios, CCS retrofitting should be prioritized under the current energy structure. The synergy between ESSs and CCS retrofitting not only accelerates energy carbon emission reduction but also the MAC of synergy is between ESSs installation and CCS retrofitting.