Research Article

Characterization of Local Nano-Heat Transfer Fluids for Solar Thermal Collection

Table 2

Percentage heat losses for the oil-based copper nano-heat transfer fluids.

FluidHeat (KJ)Percentage loss (%)

Castor oil16697.35.85
Sunflower oil16498.55.6
Coconut oil16991.35.95
Used engine oil172744.76.1
Unused engine oil17769.66.4