制冷系统热回收装置相变材料的分析研究

摘要

分析了相变材料特性，并找出了适用于制冷系统热回收装置的相变材料，通过对热物性和工作性能的研究，选取Fecl3·6H2O为本装置的相变蓄能材料，同时建立蓄热体的物理模型及模拟简化模型，在自然对流的影响下，模拟相变材料的蓄、放热特性，找出固——液界面、温度场、速度场、液相比例、传热系数、热流密度、监测点的温度等随时间的变化规律，为制冷系统热回收装置的设计提供了理论依据。%Respectively analyzed the thermal properties and working performance of the phase change material, finally selected Fecl3·6H2O as phase change material for the heat recovery unit of refrigeration system. At the same time, established a phase change model under the nature convection influence, analyzed the storing and releasing performance of phase change material, the variation of solid-liquid interface, temperature field, velocity field, liquid fraction, heat transfer coefficient, heat flux were found out.