新型LID复合螺旋“能源桩”系统的热湿耦合迁移特性及强化换热规律

针对既有地下国防工程空调系统面临的军事隐蔽性差、连续保障困难及日常运维不便等现实问题，提出新型LID复合螺旋“能源桩”系统，以取代既有空调系统中的冷却塔或冷却水池。采用理论分析、数值模拟与实验测试相结合的手段，探究该新型系统的热湿耦合迁移特性，揭示其强化换热规律。项目预期将建立该新型系统的高效“二维环管”饱和—非饱和热湿耦合换热数值模型，阐明“热干扰效应”及“湿衰减效应”的深层作用机理，提出对应定量评价标准；并探索不同参数下该新型系统的强化换热规律及沿程换热机制，借助BP神经网络确定最优系统形式。项目成果对于既有地下国防工程空调系统的改造升级具有重要参考价值，对螺旋“能源桩”地下换热器的优化创新具有重要推动意义。

Aiming at the practical problems of poor military concealment, difficulty in continuous support, and inconvenience in daily operation and maintenance faced by the existing underground national defense engineering air conditioning system, a novel LID composite spiral “energy pile” system is proposed to replace the cooling tower or cooling pool in the existing air conditioning system. A combination method of theoretical analysis, numerical simulation and experimental testing is used to explore the coupled heat and moisture transfer characteristics of the novel system and reveal its enhanced heat transfer law. The project is expected to establish a high-efficiency “two-dimensional loop” saturated-unsaturated heat and moisture coupled heat transfer numerical model of the novel system, clarify the in-depth mechanism of the "thermal interference effect" and "moisture attenuation effect", and propose corresponding quantitative evaluation standards. What’s more, the enhanced heat transfer law and heat transfer mechanism of the new system under different parameters is explored in the project, and the optimal system form with the help of BP neural network is determined. The project results have important reference value for the transformation and upgrading of the existing underground national defense engineering air-conditioning system, and have important promotion significance for the optimization and innovation of the spiral "energy pile" underground heat exchanger.