Comparative thermal analysis of an EG-based nanofluid containing DWCNTs

摘要

The thermal conductivity (TC) of DWCNT/EG nanofluid at the temperature range of 30-50 degrees C and solid volume fraction (SVF) range of 0.055-0.92% was investigated. The results showed that the enhancement of SVF at 50 degrees C increases TC up to 35.37%. Experimental data obtained for this nanofluid were compared with experimental results of SWCNT/EG, DWCNT-ZnO/EG-water (40:60), MWCNT-ZnO (50:50)/EG-water (50:50) and SWCNT-ZnO (30:70)/EG-water (60:40). Using experimental data, a correlation was proposed for the prediction of TC with R-2 (regression coefficient) and maximum correlation error of 0.993687% and 2%, respectively. Nanofluid sensitivity analysis showed that in higher SVFs, the increment of sensitivity relative to temperature is higher than in lower SVFs. Graphic