Research On The Benefit Evaluation Method Of Integrated Energy System Including CCUS Considering The Effect Of Electricity Substitutio

Increasing levels of carbon dioxide and other greenhouse gases in the atmosphere can lead to higher global temperatures.As the impacts of climate change become more apparent,governments and other actors are under increasing pressure to take action to reduce carbon emissions and limit global warming.As a result,many countries around the world are implementing policies and plans to reduce carbon emissions,such as setting targets for renewable energy use,implementing carbon pricing mechanisms and promoting energy efficiency and conservation.An emerging technology is,which involves the replacement of fossil fuels with electricity.electricity substitution and CCUS technologies are the key technologies for tackling carbon emissions.The combined application of the two can not only reduce carbon dioxide emissions,but also increase the consumption of new energy.Incorporating both electrical energy substitution and CCUS technologies into an integrated energy system is an attractive solution for carbon emissions.Based on this,this paper fully investigates the positive impact of incorporating CCUS technology on the overall benefits of an integrated energy system with electrical energy substitution,and conducts a study on the calculation model and comprehensive evaluation method of the integrated energy system index system of the park,which is mainly as follows.(1)It introduces the relevant theoretical basis of low carbon technology,takes the integrated energy system as the object,introduces typical electrical energy substitution equipment and the application scenarios of CCUS technology,studies the physical structure of the integrated energy system and its internal multi-energy coupling relationship,and lays the foundation for the construction of the index system.(2)This paper takes into account the comprehensive benefits of electrical energy substitution technology and CCUS technology as well as the technical and environmental benefits of the park construction,and establishes a 3-tier evaluation system of objectivescriteria-indicators covering various evaluation dimensions such as system energy structure,carbon emission,power supply reliability,economic cost and social development,and defines the calculation methods and normalization of each The calculation method of each indicator and the normalisation method were defined to achieve a comprehensive and universal reflection of the comprehensive benefits of integrated energy system projects through a comprehensive indicator system.(3)In order to realise the objective and subjective evaluation of the integrated energy system,this paper adopts the triangular fuzzy hierarchy method to integrate the subjective weights of the indicators,combines the entropy weighting method to calculate the objective weights of the indicators,and solves the weighting coefficients through the "deviation-based minimisation" expected combination weighting method,and then solves the expected combination weight vector of the indicator system.After obtaining the index weights,the values of the indexes are brought into the material element topological model to solve for the benefit rating of the park evaluation scheme.(4)Taking an industrial park in Yunnan as an example,the paper provides a comprehensive evaluation of four different options through a comprehensive benefit evaluation model,and then explains the strengths and weaknesses of the evaluated options according to the evaluation rating,providing a theoretical basis for the decision making of integrated energy system options.The example demonstrates that the application of electrical energy substitution technology and CCUS technology in an integrated energy system can effectively improve the level of system efficiency.The results verify the feasibility and validity of the evaluation model and method proposed in this paper.