Research Article
Effect of Installation of Solar Collector on Performance of Balcony Split Type Solar Water Heaters
Table 6
Experimental performances of all-glass vacuum tube solar water heaters with collectors at down slope placement and at reverse slope placement.
| Date | Reverse slope placement | Down slope placement | Feb. 3 | Feb. 4 | March 1 | Jan. 29 | Jan. 30 |
| Ambient average temperature (°C) | 17.1 | 16.8 | 20.3 | 14.8 | 15.6 | Average wind speed (m/s) | 1.2 | 1.4 | 0.3 | 1.6 | 0.7 | Irradiance (MJ) | 20.2 | 20.6 | 19.2 | 19.7 | 20.6 | Time (hr) | 6.0 | 6.0 | 6.0 | 6.0 | 6.0 | Initial temperature of tank (°C) | 27.7 | 14.3 | 16.9 | 12.0 | 19.6 | Final temperature of tank (°C) | 49.9 | 38.7 | 40.7 | 45.2 | 43.6 | Tank volume (L) | 120 | 120 | 120 | 120 | 120 | Temperature rise (°C) | 22.2 | 24.5 | 23.8 | 33.2 | 24.0 | Efficiency | 0.419 | 0.453 | 0.471 | 0.641 | 0.617 |
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