碳中和背景下能源投入和碳投入回报评价研究

Evaluation studies of EROI and CROI in the context of carbon neutrality

能源投入回报(EROI)和碳投入回报(CROI)是评价能源效率和碳效率的重要指标。梳理EROI和CROI的理论发展、评价方法和应用领域,归纳二者的相似性和关联性,提出未来的研究发展方向。对比发现,EROI和CROI同为效率指标,分别以系统内的能源流和二氧化碳流为基础;EROI与CROI在数值代表含义、评价结果对系统边界的敏感性和存在最小阈值等方面有很多相似点与关联性。在碳中和目标和能源转型背景下,传统能源与新能源项目耦合后的EROI评价、分子级EROI测算及EROI影响经济发展的背后机理,不同类型碳中和技术的CROI评价、最小CROI以及项目的EROI、CROI和净现值(NPV)多维评价等主题,成为未来重点研究方向。

Energy return on investment(EROI)and carbon return on investment(CROI)are important indicators for evaluating energy and carbon efficiency.Summarize the theoretical development,evaluation methods and application fields of EROI and CROI,inducing their similarities and correlations,the direction of future research direction is proposed.By comparison,it is found that EROI and CROI are both efficiency indicators based on energy flow and carbon dioxide flow in the system respectively;EROI and CROI have a lot of similarities and correlations in terms of the meaning of numerical representations,the sensitivity of the evaluation results to the system boundary,and the existence of minimum thresholds.In the context of carbon neutrality and energy transition,EROI evaluation after coupling traditional energy and new energy projects,the measurement of EROI at molecular level and the mechanism behind the influence of EROI on economic development,CROI evaluation and minimum CROI of different types of carbon neutrality technologies,and the multi-dimensional evaluation of EROI,CROI,and net present value(NPV)of the projects,etc.,have become the key research directions in the future.