熔盐高温储热过程传递和化学反应耦合机理与调控方法

熔盐传热储热材料以其量大面广和战略性储备优势，已成为先进储热技术首选材料。围绕熔盐材料精准设计与大规模熔盐储热系统性能优化，拟对4个关键科学问题开展深入系统研究，包括：多组元全组成宽温域熔盐材料热物性与结构模型构建；熔盐巨化学系统传递和反应协同规律与控制理论；服役工况下熔盐材料与系统热性能调控方法；熔盐传热储热材料热性能数据库构筑与集成模拟预测。. 针对服役工况熔盐微观多种载能子迁移扩散、相互作用和耦合的微观传输现象和能量转换，建立多尺度多维度熔盐传递与反应耦合关系及本构方程；探悉熔盐巨化学系统反应热力学和动力学规律，实验观测熔盐载能子形成和迁移演变过程、反应中间体和过渡态及其相应产物，揭示熔盐相体系变化和相态转变对微结构演化和突变规律及其对性能的影响规律，提出服役工况下熔盐体系基于结构效应的控制反应途径的熔盐储热系统热性能调控方法，实现熔盐传热储热材料精准设计及大规模储热系统性能调控。

Molten salts materials with heat transfer and thermal energy storage have become the primary choice for advanced thermal energy storage technology due to their abundance in nature and strategic reserve advantages. Aiming at the precise design of molten salts materials and the performance optimization of large-scale thermal energy storage systems, we propose to carry out the fundamental research on four key scientific issues. The proposed research includes: (a) the construction of molten salts thermophysical properties and internal structure models for multi-component full-composition molten salts materials; (b) the synergistic laws and control theory for heat transfer and chemical reactions in molten salts grand chemical systems; (c) the thermal performance control method for molten salts materials and thermal energy storage systems under operation conditions; (d) the construction of the thermal performance database of molten salts materials and its integrated simulation prediction.. Based on the scientific issues on the diffusion, interaction and coupling of multiple microscopic energy carriers in microscopic transport and energy conversion under operation condition, our proposed research also includes:(a) build the multiscale and multidimensional constitutive models for the coupling between transport and reactions in molten salts; (b)explore the thermodynamics and kinetics of reaction in molten salts grand chemical systems; (c) observe the formation and transport evolutionary process of energy carriers , reaction intermediates, transition state and its reaction products in molten salts; (d) reveal the effect of phase system change and phase state change on microstructure evolution, mutation and performance;(e) put forward a reaction control approach for controlling the thermal performance of molten salt thermal energy storage systems based on the structure effect of the molten salt system under operation conditions. Finally, this project is aiming to realize the precise design of molten salts materials and the thermal performance optimization of large-scale thermal energy storage systems.