Research On Optimization Of Central Cooling And Heating Loop Pipe Network In Urban Complex

With the rapid development of social economy and the continuous expansion of the scale of urbanization,the urban complex has become an important carrier to meet people's daily work and life,and has gradually become a high density gathering area for urban population.Large-scale urban complexes have large investment and complex business conditions.The rational allocation of energy pipeline system parameters and the adoption of optimal design schemes,operation modes,and adjustment methods will greatly reduce the energy consumption of the pipeline system,and at the same time,it will have good social and economic benefits and can improve the comprehensive energy efficiency of pipeline system.This article analyzed the dynamic heat and cold load in a year of a urban city complex.According to the results,the distribution of cold and heat load in various formats is summed up and the factors affecting the complex are classified and discussed.The load simulation results show that the cold and heat load of the most time period of the whole year is in a partial operating state,indicating that there is a great energy saving potential and the necessity of the system optimization.The MATLAB software is used to solve the hydraulic characteristics under the different load rate conditions of the pipe network and the different number of cold and heat sources.The location of the hydraulic intersection point,the flow direction of each pipeline and the most unfavorable loop length corresponding to each cold and heat source are determined,analysis the multiple heat sources and multiple cold source ring networks.Establish the objective function for the optimization of the operation of the city urban complex pipe network.According to the different cold and heat load rate conditions,the corresponding optimal cold and heat source opening scheme and the load bearing capacity of each cold and heat source under the optimal operation scheme are determined.The energy consumption rules of pumps under different collocation schemes are explored,providing corresponding solutions for the minimum energy consumption operation of the system.Applying the research method of this paper to analyze the optimization of the operation of the circular pipe network of a comprehensive urban project.