Design And Optimization Of Regional Energy System In Multiple Comprehensive Industrial Park

With the acceleration of urbanization and industrialization,China has vigorously built the comprehensive industrial park with the aim of integrating and optimizing resources,emphasizing the effect of industrial clusters.However,in the process of designing the energy supply system for early industrial parks,due to the unreasonable planning object,design condition,operation strategy and gas turbine combination,the energy supply system has problems such as high energy consumption,low efficiency,heavy pollution,and actual operating effect deviating from the design value,while pursuing economic benefits and improving the core competitiveness of enterprises.This paper takes the multiple comprehensive industrial park as research object and builds the optimal design model of regional energy system to solve the problems of optimal energy supply strategy,gas turbine combination plan and total installed capacity of non-gas turbine equipment,which realizing high-efficiency,low-carbon,economic and sustainable energy supply in industrial park.In this paper,the accumulative cold and heat load,electric load and thermoelectric ratio are used to evaluate the complex terminal load of different industrial clusters in the comprehensive industrial park,so as to fully tap the potential of energy coordination and complementarity among them.At the same time,the design day selection method is proposed to provide scientific and reasonable design conditions for the optimal design of the energy supply system.Based on multiple design days,this paper constructs a multi-layer optimization model including three modules of inner layer,outer layer and upper layer optimization to design the regional energy system of multiple comprehensive industrial park,and uses MATLAB to compiles the solution process.The inner optimization model emphasizes the combined energy supply of multiple gas turbines,introduces energy storage devices and renewable energy equipment,and takes the weighted evaluation index and boundary evaluation index as the objective function to solve the optimal energy supply strategy of a gas turbine combination and the total installed capacity of non-gas turbine units.The outer optimization model includes the gas turbine combination and adaptation model,which combines the inner optimization model to solve the best gas turbine combination method under a total installed capacity range.The upper layer optimization provides the total installed capacity range for the outer layer optimization model to improve the efficiency of model solution.This paper takes a multiple comprehensive industrial park in south China as the research case and uses the established multi-layer optimization model to design the regional energy system.The result shows that the optimal gas turbine combination of the industrial park is "10MW + 3MW",and the weighted evaluation index reaches 0.2127.Compared with the traditional energy system,the annual total cost,primary energy consumption and carbon emission saving rate are 9.11%,22.59% and 44.26% respectively,while the comprehensive energy utilization rate of the park is 88.58%,an increase of 29%,and the percentage of renewable energy is 8.46%.In addition,this paper deeply analyzes the rationality of the best energy supply strategy and the impact of the total installed capacity and different combinations of the gas turbine on various indicators,which further verifies the reliability of the optimized model.The model can provide theoretical basis and technical guidance for designing the optimal energy equipment combination and energy supply strategy for the efficient,low-carbon,and economic energy supply system of comprehensive industrial park.