摘要
选取石墨、硅粉以及纳米金属铜、钨、镍作为添加物,按5%、15%、30%、50%的质量比添加比例分别加入硬脂酸、石蜡及石蜡-硬脂酸混合物3种相变材料中制备出63种复合相变材料,并对63种复合相变材料热导率的变化规律进行实验研究,旨在了解5种添加剂对强化相变材料导热性能的效果。研究结果表明,5种添加剂均可提高相变材料热导率。从强化导热性能的效果和经济性两方面考虑,石墨是最佳选择。钨粉与相变材料融合性较差,强化导热性能的效果最差,不适宜作为增强相变材料热传导性能的添加剂。
Graphite(GRP)powder,silicon(Si)powder,nano-copper(Cu)powder,nano-tungsten(W)powder,and nano-nickel(Ni)powder were selected as the additives in this study.Meanwhile,the additives were added in stearic acid(SA),paraffin wax(P),and a P-SA mixture in the proportions of 5%,15%,30%,and 50% respectively,to prepare 63 combinations of composite phase transition materials.The variation of thermal conductivity of the 63 sorts of composite phase transition materials were studied experimentally.The aim of this study was to understand the impact of the five additives on the thermal conductivity of the phase transition materials.The results show that each of the additives can facilitate in the thermal conductivity of the phase transition materials.Among the additives tested,graphite powder displayed the best heat conductance and lowest cost.The addition of nano-tungsten powder to the phase transition materials resulted in poor fusibility and the lowest increase in thermal conductivity.It is not a suitable additive to increase the heat conductance of the tested phase transition materials.
作者
闫全英
王晨羽
梁高金
何百川
武楷洋
王随林
Yan Quanying;Wang Chenyu;Liang Gaojin;He Baichuan;Wu Kaiyang;Wang Suilin(School of Environment and Energy Engineering,Beijing University of Architecture,Beijing 100044,China)
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2021年第9期205-209,共5页
Acta Energiae Solaris Sinica
基金
北京市教委科技计划重点项目(KZ201710016011)
北京学者计划项目(2015NO.022)。
关键词
相变材料
添加剂
金属粉末
热导率
被动式太阳能建筑
phase change materials
additive compounds
metal powders
thermal conductivity
passive solar building
