Isobaric Specific Heat Capacity for Al2O3/Water Ethylene Glycol Mixture Nanofluid

Abstract

Specific heat is a vital characteristic of nanofluids. The present work is an experimental assessment for the isobaric specific heat measurements for the Al2O3 nanoparticle dispersed in a base fluid of different mixture ratio of ethylene glycol and water at 30, 40, 50, and 60 vol%. The experiments were conducted over temperature range from 35 to 105 °C with nanoparticle concentrations of 0.5 to 2.5 vol%. The results indicated that the specific heat of nanofluid decreases as the nanoparticle volume increases and EG ratio increases but increases as the temperature increases. This characteristic demonstrates that the use of nanofluids should be at as high temperature as possible to fulfill a good beneficial effect. A new correlation from the measurements with maximum deviation of 2.2% was found to estimate the specific heat for these nanofluids.

Experimental studies on thermophysical properties of ethylene glycol/water-based MgO nanofluids

“…The present flow calorimeter test rig is a modified version of the test rig designed by Hassan et. Al [24]. This elementary test rig [24] was verified using distilled water and its results show an accordance with ASHRAE data with a maximum deviation of about 2% and a standard deviation of 0.032 kJ/kg.K.…”