桥梁箱体结构自调温固液相变材料的机理

摘要

在已有的相变材料及相变理论研究分析的基础上,提出了一种适用于桥梁箱体结构"自调温"的石蜡-稻壳灰相变储能混凝土新型材料.通过研究该新型材料对混凝土温升过程中的影响规律,提出了相变储能稻壳灰混凝土吸热温升估算公式.进一步地,通过对普通混凝土与相变储能混凝土箱体结构温度场数值模拟及对比,分析了其在混凝土箱体结构中的"自调温"效用.%Based on the analysis of existing phase change materials and phase transition theory,a new kind of paraffin waxy ash-phase change energy storage concrete that suitable for self-adjusting temperature of bridge box structure was presented.By studying the influence of the new material on the temperature rise process of the con-crete,and the phase change energy storage of the rice husk ash concrete thermal temperature rise estimation formula was presented.Furthermore,through the numerical simulation and comparison of the temperature field of ordinary concrete and phase change energy storage concrete box structure, the self-adjusting temperature effect in the con-crete box structure is analyzed.