The migration characteristics of nanoparticles in the pool boiling process of nanorefrigerant and nanorefrigerant-oil mixture

Migration characteristics of nanoparticles in the pool boiling process of nanorefrigerant and nanorefrigerant–oil mixture are fundamental knowledge for the application of nanorefrigerants in refrigeration systems. In this paper, migration characteristics of nanoparticles in the nanorefrigerant–oil mixture as well as in the nanorefrigerant were experimentally studied and numerically simulated. Experimental results show that the migrated mass of nanoparticles in the pool boiling process of both nanorefrigerant and nanorefrigerant–oil mixture, increase with the increase of the original mass of nanoparticles and the mass of refrigerant; the migration ratio decreases with the increase of volume fraction of nanoparticles; the migrated mass of nanoparticles and migration ratio in the nanorefrigerant are larger than those in the nanorefrigerant–oil mixture. A numerical model, which can qualitatively well predict the migrated mass of nanoparticles, was established, and the deviations between the model predictions and experimental data were in the range of 7.7–38.4%.

[1]  Yulong Ding,et al.  Experimental investigation into the pool boiling heat transfer of aqueous based γ-alumina nanofluids , 2005 .

[2]  B. Raj,et al.  Effect of clustering on the thermal conductivity of nanofluids , 2008 .

[3]  Stephen U. S. Choi.  Enhancing thermal conductivity of fluids with nano-particles , 1995 .

[4]  Y. Xuan,et al.  Investigation on Convective Heat Transfer and Flow Features of Nanofluids , 2003 .

[5]  Nandy Putra,et al.  Pool boiling of nano-fluids on horizontal narrow tubes , 2003 .

[6]  Lin Shi,et al.  Application of nanoparticles in domestic refrigerators , 2008 .

[7]  J. Eastman,et al.  Measuring Thermal Conductivity of Fluids Containing Oxide Nanoparticles , 1999 .

[8]  D. Fornasiero,et al.  Bubble-particle attachment and detachment in flotation , 1999 .

[9]  Y. Xuan,et al.  Heat transfer enhancement of nanofluids , 2000 .

[10]  Don W. Green,et al.  Perry's Chemical Engineers' Handbook , 2007 .

[11]  Xianfan Xu,et al.  Thermal Conductivity of Nanoparticle -Fluid Mixture , 1999 .

[12]  W. Roetzel,et al.  Pool boiling characteristics of nano-fluids , 2003 .

[13]  Zhou Danna,et al.  Heat transfer enhancement of copper nanofluid with acoustic cavitation , 2004 .

[14]  Dongsoo Jung,et al.  Boiling heat transfer enhancement with carbon nanotubes for refrigerants used in building air-conditioning , 2007 .

[15]  Li Hui,et al.  INVESTIGATION OF POOL BOILING HEAT TRANSFER OF R11 WITH TiO2 NANO-PARTICLES , 2008 .

[16]  M. Feidt,et al.  Proprits thermodynamiques et physiques des mlanges de fluides frigorignes et d'huiles , 1999 .

[17]  Chi-Chuan Wang,et al.  Enhancement of thermal conductivity with Cu for nanofluids using chemical reduction method , 2006 .

[18]  L. Liao,et al.  Sorption and agglutination phenomenon of nanofluids on a plain heating surface during pool boiling , 2008 .

[19]  R. Prasher,et al.  Brownian-motion-based convective-conductive model for the effective thermal conductivity of nanofluids , 2006 .