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本文利用FLUENT软件建立了地下群井换热器的三维非稳态流固耦合数理模型,并将太阳能集热器和板式换热器模型作为用户自定义函数动态加载到地下群井换热器模型中,实现了对太阳能季节性土壤蓄热过程的动态仿真。在此基础上分析了在系统设备容量不变的情况下,地下埋管以及太阳能集热器的布置形式对土壤蓄热特性的影响。结果表明,选择合适的设备布置形式可以大大提高蓄热能效比以及土壤换热器蓄热率。
In this paper, FLUENT software was used to establish three-dimensional unsteady fluid-solid coupling mathematical model of underground well heat exchanger, and the model of solar collector and plate heat exchanger was dynamically loaded into the underground well heat exchanger model as a user-defined function , The dynamic simulation of seasonal heat storage in solar energy was realized. Based on this, the influence of underground buried pipes and arrangement of solar collectors on the heat storage characteristics of the soil is analyzed under the condition of the same system equipment capacity. The results show that choosing appropriate equipment layout can greatly improve the energy storage ratio of heat storage and the heat storage rate of soil heat exchanger.