Number Simulation And Optimal Design Of Aquifer Thermal Energy Storage Based On Fluent

Nowadays,as a kind of renewable energy,aquifer thermal energy storage(ATES)is an important way to solve the energy crisis,to improve the ecological environment and to protect non-renewable resources.It is very important to analyze the key factors of temperature field in ATES and to study the feasibility of the system.Based on the temperature field of ATES,this study carries out numerical simulation analysis and optimization design with CFD and multi-attribute decision analysis method to analysis the influence of relevant parameters on temperature field of ATES.It is of great significance to the promotion of ATES technology,the expansion of energy types and environmental protection.The main contents of this paper are as follows:1.Based on the mathematical theory of ATES,the influence of groundwater and heat transfer on aquifer temperature field is constructed.The model of ATES is established by Fluent software to simulate the operation of ATES.At the same time,the influence of key factors on aquifer temperature field is obtained by response surface curve analysis.The results show that:the increase of aquifer thickness,the increase of vertical bottom hole height difference,the increase of well spacing and the decrease of pumping volume can effectively reduce the change of temperature field around the system,and the influence of well spacing is the most significant.In hot water recharge,the well spacing is non-linear correlated with the change rate of aquifer temperature,while in cold water recharge,it is linear correlated.Therefore,the design of well spacing is very important for efficient utilization of ATES.2.Quantitative analysis of the impact of different well spacing combinations on the comprehensive benefits of ATES,the establishment of ATES model,based on the evaluation indicators.By using TOPSIS method,this paper obtains the best well spacing design.Compared with the traditional system,the feasibility of popularization and application of ATES is analyzed.The result shows that the design of well spacing has a great impact on the system,and it can make the thermal efficiency up to 92.8%.the optimal building design can also be made.Moreover,compared with the traditional system,ATES can save half of the electricity consumption,one third of investment cost,and almost half of GHG emission,which proves this system has great potential to alleviate energy pressure and protect the environment.