煤气与热力2024，Vol.44Issue(11)：1-6,6.
纳米材料对熔盐热物性的影响
Influence of Nanomaterials on Thermal Performance of Molten Salt
孟强 1李烁 2侯东伟 2熊亚选2
作者信息
- 1. 中国人民解放军63933部队,北京 100091
- 2. 北京建筑大学供热供燃气通风及空调工程北京市重点实验室,北京 100044
- 折叠
摘要
Abstract
Nanomaterials(SiO2,MgO)were u-niformly dispersed in solar salts(NaNO3 mass fraction 60％,KNO3 mass fraction 40％)using high-tempera-ture melting method to obtain nano-molten salts.The latent heat,melting point and specific heat capacity of molten salt were measured by differential scanning cal-orimetry,and the mechanism of nanoparticles affecting the specific heat capacity of molten salt was analyzed by combining the microstructure of molten salt.Com-pared with solar salts,the latent heat of melting of nano-molten salts increased and the melting point de-creased after the addition of SiO2 and MgO nanoparti-cles.Compared with solar salts,the specific heat ca-pacity of nano-molten salts in both solid and liquid states increased after the addition of SiO2 nanoparti-cles.Basically,the specific heat capacity of SiO2 nano-particles decreases with the increase of the mass frac-tion of SiO2 nanoparticles.Compared with the solar salt,the specific heat capacity of nano-molten salts in both solid and liquid states increased after the addition of MgO nanoparticles.The specific heat capacity of the MgO nano-molten salt in both solid and liquid states exhibited a parabolic shape with the increase of the mass fraction of MgO nanoparticles.The chemical composition of nanoparticles and the selection of nano-particles and base salts can easily affect the enhance-ment effect of the specific heat capacity of nano-molten salts.The results of microstructure analysis show that the dispersion uniformity of nanoparticles affects the enhancement effect of the specific heat capacity of nano-molten salts.关键词
储热/熔盐/纳米颗粒/热物性/微观结构Key words
heat storage/molten salt/nanopar-ticles/thermal performance/microstructure分类
建筑与水利引用本文复制引用
孟强,李烁,侯东伟,熊亚选..纳米材料对熔盐热物性的影响[J].煤气与热力,2024,44(11):1-6,6.
