摘要
利用泡沫金属多孔结构的吸附性能,以八水氢氧化钡为相变材料,泡沫铜为基体,制备了结晶水合盐/泡沫金属复合相变材料。采用差示扫描量热法测定了八水氢氧化钡的热循环性能,随着热循环次数的增加,相变材料的相变温度基本不变,相变潜热略有减少,八水氢氧化钡具有较好的热稳定性。搭建了相变储能实验台,实验分析了3组不同实验方案,结果表明,填充泡沫铜不仅增强了相变材料的传热速率,而且有效地降低了八水氢氧化钡的过冷度。当泡沫金属使用较大孔密度后,结晶水合盐的过冷问题得到了比较明显的改善。
Due to the adsorption performance of porous metal foam structure, a salt hydrate/metal foam composite phase change material （PCM） was prepared by using barium hydroxide octahydrate （Ba（OH）2 · 8H20） as latent heat storage PCM and copper foams as supporting matrix. The thermal properties of Ba（OH）2 · 8H20 were measured by differential scanning calorimetry after a number of repeated thermal cycles. As the number of thermal cycles increases, the phase change temperature of Ba（OH）2 · 8H20 is almost constant and the latent heat of fusion decreases slightly, which implies that Ba（OH）2 · 8H20 has a good thermal stability. An experimental setup was built to study the heat transfer performance ofBa（OH）2 · 8H20with/without copper foams. The results show that the high porosity metal foam not only enhances the heat transfer rate ofBa（OH）2 · 8H20 within thermal storage units, but also reduces the supercooling of PCM effectively. The supercooling of salt hydrates can be improved significantly by using larger pores per inch （PPI） metal foams.
出处
《化工学报》
EI
CAS
CSCD
北大核心
2013年第10期3565-3570,共6页
CIESC Journal
基金
国家自然科学基金项目(50876004)~~
关键词
泡沫铜
相变材料
热循环
传热
结晶水合盐
copper foams
phase change material
thermal cycling
heat transfer
salt hydrate
