Table 2 Stored energy fraction F(r) for the various samples for different sunlight path lengths
SWCNH concentration (g/l) | Sample label (base fluid) | F(r) x= 1.0 cm (%) | F(r) x= 2.5 cm (%) | F(r) x= 5.0 cm (%) | F(r) x= 10.0 cm (%) |
|---|---|---|---|---|---|
Pure base fluid | A0 (water) | 20.5 | 26.7 | 31.6 | 36.9 |
Pure base fluid | G0 (glycol) | 17.4 | 23.0 | 28.0 | 33.4 |
0.005 | A1 (water) | 54.4 | 82.0 | 95.7 | 99.8 |
0.005 | G1 (glycol) | 43.2 | 70.1 | 89.3 | 98.5 |
0.01 | A2 (water) | 72.9 | 95.0 | 99.6 | 100 |
0.01 | G2 (glycol) | 68.0 | 92.7 | 99.3 | 100 |
0.02 | A3 (water) | 90.9 | 99.6 | 100 | |
0.02 | G3 (glycol) | 88.3 | 99.4 | 100 | |
0.05 | A4 (water) | 99.6 | 100 | ||
0.05 | G4 (glycol) | 99.1 | 100 |