Silver (Ag) has the highest thermal conductivity of all metals, making it an attractive nanoparticle for use in heat transfer systems. The shape of nanoparticles influences their thermal conductivity, so three varieties of Ag nanoparticles were tested in this study. The Thermal Constants Analyser measured the thermal conductivity of Ag nanospheres (NSs), nanowires (NWs), and nanoflakes (NFs) between 10-30 °C using the transient plane source (TPS) method. Results showed that ...
Author(s): Guan-Hua Cheng, Ke-Fa Cen, Li-Wu Fan, Qing Ding, Xin Fang, Xu Xu, Ya-Cai Hu, Zi-Tao Yu
The effects of silver nanowire size on the thermal conductivities of ethylene glycol-based nanofluids were investigated experimentally. The effects of altering the loading concentration of nanowires, and altering the temperature were also investigated. In addition to this, an investigation into the effects of the nanowire dimensions on the rheological properties of the nanofluids was also conducted. Theoretical models were then developed based on the experimental results....
Author(s): Hai Lu, Li-Wu Fan, Qing Ding, Xin Fang, Zi-Tao Yu
A paraffin-based composite phase change material (PCM) was prepared by the addition of hexagonal boron nitride (h-BN) nanosheets to melted paraffin wax followed by vigorous stirring. The nanosheets were added in quantities ranging from 1 to 10 wt. %. A reference sample of pure paraffin was also prepared. It was determined that the addition of h-BN nanosheets resulted in an increase in thermal conductivity and that the melting and solidification rates were also ...
Author(s): Guan-Hua Cheng, Jian-Feng Hou, Li-Wu Fan, Qing Ding, Xiao Wang, Xiao-Li Yao, Xin Fang, Ya-Cai Hu, Yu-Yue Wu, Zi-Tao Yu
Two organic phase change materials (PCMs) were investigated to determine their effects on the thermal management capabilities of electronics. The thermo-physical properties of n-eicosane and 1-hexadecanol were determined experimentally, and the two PCMs were then added to unfinned, and finned heat sinks. It was determined that a PCM with a high melting point is able to increase the time of protection from overheating; however, it was also determined that if ...
Author(s): Ke-Fa Cen, Li-Wu Fan, Rong-Hua Hong, Xiao Wang, Xin Fang, Xu Xu, Ya-Cai Hu, Yi Zeng, Yu-Qi Xiao, Zi-Tao Yu
Autoclaved aerated concrete was studied because it has potential to be used in the design of energy-efficient buildings. Three different samples were tested, each with a unique density. Of particular interest to this work was the thermal conductivity of the samples, as this material would be used as a thermally insulating concrete. The thermal conductivities were measured at various percentages of moisture content, and it was found that increasing moisture ...
Author(s): Hong-Qing Jin, Li-Wu Fan, Xiao-Li Yao, Xu Xu, Zi-Tao Yu
