Abstract:

Efficient and reliable storage systems for thermal energy are important requirement in many applications where heat supply or availability did not coincide.This study focused on the evaluation of heat transfer enhancement in storage systems used building air conditioning systems.A numerical model describing the melting process was presented by considering the difference of the solid-liquid density and natural convection.The two-dimensional melting process of ice ball filled with aluminum foam was numerically simulated at the third boundary condition, from which the authors could get the temperature field and phase change interface positions changed with time, and compared it with pure ice.The simulation results showed that melting time filled with aluminum foam was greatly shorter than that with water only.The effect of aluminum foam porosity on melting time was also analyzed: melting time became longer with the increase of aluminum foam porosity.

摘要：

建立了蓄冰球中填充泡沫铝的融化相变过程自然对流模型,模型中考虑了固相与液相密度差和自然对流的影响。数值模拟了以铝为骨架、冰为填充相的单个冰球的二维融化过程，得到了在第三类边界条件下蓄冰球融化过程的温度场和相界面移动规律，并与只填充纯冰的蓄冰球传热过程进行比较，同时分析了泡沫铝的孔隙率对融化时间的影响。