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.
| Fluid | Heat (KJ) | Percentage loss (%) |
| Castor oil | 16697.3 | 5.85 | Sunflower oil | 16498.5 | 5.6 | Coconut oil | 16991.3 | 5.95 | Used engine oil | 172744.7 | 6.1 | Unused engine oil | 17769.6 | 6.4 |
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