化工进展2018，Vol.37Issue(2)：681-688,8.DOI:10.16085/j.issn.1000-6613.2017-0954
石墨烯纳米流体相变材料蓄冷特性的数值模拟
Numerical simulation of solidification characteristics of graphene nanofluid as phase change material
摘要
Abstract
Graphene nanofluid is a promising phase change material for improving the efficiency of cool storage.The solidification characteristics of water based graphene nanofluid were numerically investigated;enthalpy-porosity method was adopted to track the solid-liquid interface; the effects of graphene nanosheet mass fraction,cool storage cavity size and geometry on the solidification time and solid-liquid interface evolution were analyzed.The results showed that the solidification time decreased significantly with the increase of graphene nanosheet mass fraction.In a circular cool storage cavity with a diameter of 72mm,the solidification time for 1.2% graphene nanofluid was 30.1% less than that for the deionized water,which was consistent with the experimental results.With the decrease of circular cavity diameter,the solidification time for graphene nanofluid significantly decreased,but the enhancement effect of thgraphene nanosheet on the solidification was weakened.For the same sectional area,the moving velocity of solid-liquid interface during the solidification in a triangular cavity is larger than that in the circular and square cavities,which indicated that the triangular cavity was more conducive to the promotion of solidification process.For those three types of cavities,the solidification occurred at the bottom of cavity in the initial stage; the solid-liquid interface was similar to the shape of the cavity itself and tended to be circular in the middle and later stages,respectively.关键词
蓄冷/相变/纳米粒子/石墨烯/数值模拟Key words
cool storage/phase change/nanoparticles/graphene/numerical simulation分类
能源科技引用本文复制引用
陈晨,彭浩..石墨烯纳米流体相变材料蓄冷特性的数值模拟[J].化工进展,2018,37(2):681-688,8.基金项目
上海高校青年东方学者人才计划项目(QD2016045). （QD2016045）
