Convective heat transfer characters of nanoparticle enhanced latent functionally thermal fluid  

作　　者：WANG Liang LIN GuiPing CHEN HaiSheng DING YuLong 

机构地区：[1]School of Aeronautical Science and Engineering,Beihang University,Beijing 100083,China [2]Institute of Particle Science and Engineering,University of Leeds,Leeds LS2 9JT,UK

出　　处：《Science China(Technological Sciences)》2009年第6期1744-1750,共7页中国科学（技术科学英文版）

基　　金：Supported by the National Natural Science Foundation of China(Grant No. 50076020)

摘　　要：The latent heat of the microencapsulated phase change material(MPCM)increases the effective ther-mal capacity of latent functionally thermal fluid.However,researchers found that the heat transfer performance of such fluids was diminished due to the reduction of the low thermal conductivity of MPCM.For this reason,the nanoparticle enhanced latent functionally thermal fluids were formulated and the heat transfer behaviors of these fluids in a vertical circular tube at the laminar regime were conducted.The result showed that slurries containing 0.5% TiO2 nanoparticles by mass and 5%―20% MPCM by mass exhibited improved heat transfer rates in comparison with the conventional latent functionally thermal fluid and that the enhancement increased with the increasing MPCM concentration and up to 18.9% of the dimensionless wall temperature was reduced.The latent heat of the microencapsulated phase change material (MPCM) increases the effective thermal capacity of latent functionally thermal fluid. However, researchers found that the heat transfer performance of such fluids was diminished due to the reduction of the low thermal conductivity of MPCM. For this reason, the nanoparticle enhanced latent functionally thermal fluids were formulated and the heat transfer behaviors of these fluids in a vertical circular tube at the laminar regime were conducted. The result showed that slurries containing 0.5% TiO2 nanoparticles by mass and 5%–20% MPCM by mass exhibited improved heat transfer rates in comparison with the conventional latent functionally thermal fluid and that the enhancement increased with the increasing MPCM concentration and up to 18.9% of the dimensionless wall temperature was reduced.

关 键 词：LATENT functionally thermal fluid NANOPARTICLE microencapsulated phase change material CONVECTIVE heat TRANSFER 

分 类 号：TB383.1[一般工业技术—材料科学与工程]