潜热蓄热凝固过程的相似法求解与性能分析

COMPUTATION AND ANALYSIS OF SOLIDIFICATION PROCESS FOR LATENT HEAT STORAGE

利用相似法及数值计算来解凝固问题,能大大节省计算量,而在工程应用上又可得到足够的精度。本文用此方法对管壳式蓄热器常用的管型进行了一系列计算,分析了不同管型、结构尺寸及放热速度等对蓄热器放热性能的影响,为设计蓄热设备提供了依据。为了结合太阳能蓄热具体情况,本文主要计算和分析B_i=1附近的有关数值。文中也分析了简化的一维模型所得的结果,同时列出部分实验数据以资比较。

The similarity method and numerical computation are used to solve the solidification problem for thermal Energy Storage unit with both bare tube and finned tube under differant structural parameter and differant Biot number. Thus, its heat transfer performance is predicted. The simplified one dimensional solutions and some experiments data are also given for comparison.