摘要
在节能减排的背景下,新能源的开发和利用对国家发展至关重要,相变蓄能技术可以解决新能源时间和空间不匹配的问题。文章构建了V形结构金属骨架,对纯石蜡方腔、含均匀结构金属骨架石蜡方腔、含V形结构金属骨架石蜡方腔的模型,采用有限元方法数值模拟并分析了不同模型的熔化速率、蓄热速率和局部热非平衡效应。结果表明:添加金属骨架有利于相变材料的熔化,其中V形结构金属骨架的效果更好;与均匀结构金属骨架相比,V形结构金属骨架具有更加明显地提升相变材料蓄热速率的效果;在传热前期,V形结构金属骨架的局部热非平衡效应更明显,而在传热后期,其温度均匀性更好。
In the context of energy conservation and emission reduction,the development and utilization of new energy is crucial to national development.Phase change energy storage technology can solve the problem of mismatch between time and space of new energy.In this paper,a V-shaped structure metal skeleton is constructed.The finite element method was used to numerically simulate and analyze the melting rate,heat storage rate and local thermal non-equilibrium effects of the models of pure paraffin square cavity,paraffin square cavity with uniform structure metal framework,and paraffin square cavity with V-shaped structure metal framework.The results show that the addition of metal skeleton is conducive to the melting of phase change materials,and the effect of V-shaped structure metal skeleton is better;compared with uniform structure metal skeleton,V-shaped structure metal skeleton has a more obvious effect on improving the heat storage rate of phase change materials;in the early stage of model heat transfer,the local thermal non-equilibrium effect of the V-shaped structure metal skeleton is more obvious,but in the later stage of model heat transfer,its temperature uniformity is better.
作者
李项羽
陈宝明
王惠临
崔云杰
张明
LI Xiangyu;CHEN Baoming;WANG Huilin;CUI Yunjie;ZHANG Ming(School of Thermal Engineering,Shandong Jianzhu University,Jinan 250101,China)
出处
《山东建筑大学学报》
2023年第6期39-46,共8页
Journal of Shandong Jianzhu University
基金
国家自然科学基金项目(51976111)。
关键词
金属骨架
V形结构
数值模拟
相变传热
局部热非平衡效应
metal skeleton
V-shaped structure
numerical simulation
phase change heat transfer
the local thermal non-equilibrium
