Analysis of factors influencing heat transfer performance of energy diaphragm walls based on orthogonal test
To address the limitations in current research on the heat transfer characteristics and mecha-nisms of energy diaphragm walls,this study examines the influence of various factors on heat transfer efficiency.First,a three-dimensional numerical model is established,with simulation data validated against measured data to ensure model accuracy.Based on this model,a 90-day operational period is simulated,during which the effects of branch pipe spacing,inlet water temperature,circulating water flow rate,initial ground temperature,and soil thermal conductivity on the heat transfer efficiency of en-ergy diaphragm walls are analyzed using single-factor tests.Finally,the influence of each factor on thermal efficiency of energy diaphragm walls is compared through orthogonal tests.The results indi-cate that increasing branch pipe spacing,inlet water temperature,circulating water flow rate,and soil thermal conductivity,as well as reducing initial ground temperature,all contribute to enhanced heat transfer rates.Notably,increased branch pipe spacing and circulating water flow rate yield better im-provements in heat transfer efficiency during the early stages of system operation than later stages,while higher soil thermal conductivity proves more beneficial in the later stages.The ranking of fac-tor influence on heat transfer efficiency for energy diaphragm walls is as follows:inlet water tempera-ture>initial ground temperature>branch pipe spacing>soil thermal conductivity>circulating water flow rate.
geotechnical engineeringenergy diaphragm wallnumerical simulationheat transfer effi-ciencyorthogonal test
万方数据
维普
