Research Article
Environmental Life-Cycle Analysis of Hybrid Solar Photovoltaic/Thermal Systems for Use in Hong Kong
Table 3
Cumulative energy in free-stand PV/T system.
| Materials | Quantity consumed (kg) | Cumulative energy intensity (MJ/unit) | Cumulative energy (kWh) |
| PV/T collector |
| Front glazing |
| Low-iron glass (1.76 m2) | 19.7 | 19.7 | 107.9 |
| Thermal insulation |
| Glass wool | 1.69 | 31.7 | 14.9 |
| Thermal absorber |
| Aluminum absorber | 18.3 | 219 | 1114.7 |
| Frame and back cover |
| Aluminum | 1.78 | 219 | 108.0 |
| PV Encapsulation |
| PV Module | 1.11 m2 | 976 | 1083.4 |
| BOS |
| Water tank |
| Stainless steel tank | 4.20 | 82.2 | 273.0 | Tank insulation (Glass wool) | 1.58 | 31.7 | 13.9 | Aluminum Cladding | 0.966 | 219 | 58.8 |
| Connecting pipe |
| Copper piping (15 mm dia.) | 2.4 m | 6.33 | 4.2 | Pipe insulation (Glass wool) | 0.0627 | 31.7 | 0.6 |
| Structural support and accessories |
| Steel stand | 14.2 | 29.2 | 115.2 | Pipe fittings and structural joints | 7.19 | 140.0 | 93.3 | Inverter + electric wiring | 5% of PV module | 54.2 |
| | | Total: | 3041.8 |
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