Research Article
Environmental Life-Cycle Analysis of Hybrid Solar Photovoltaic/Thermal Systems for Use in Hong Kong
Table 2
Collector and technical design data of BiPV/T system.
| Design parameters | Data |
| Front glazing (low-iron glass) |
| Thickness | 0.004 m | Surface area | 1.61 m2 | Depth of air gap underneath | 0.025 m |
|
PV encapsulation (TPT + EVA + solar cell + EVA + TPT + silicon gel) |
| Solar cell type | single-crystalline silicon | Cell area | 0.81 m2 | Cell electrical efficiency at STC | 13% | Solar cell temperature coefficient | 0.005/K | Emissivity | 0.8 | Absorptivity | 0.8 | Packing factor (wrt glazing) | 50% |
| Thermal absorber (aluminum alloy) |
| Thermal capacity | 903 kJ/(kg·K) | Density | 2702 kg/m3 | Thermal conductivity | 237 W/(m·K) | Emissivity | 0.8 | Absorptivity | 0.9 |
| Insulation material (glass wool) |
| Thickness | 0.03 m | Air gap between insulation layer and building wall | 0.02 m |
| Building wall (brick) |
| Thickness | 0.15 m | Density | 1600 kg/m3 | Thermal capacity | 880 J/(kg·K) | Thermal conductivity | 1.0 W/(m·K) |
| Water tank (steel) and connecting pipes (copper) |
| Water storage capacity | 0.46 m3 | Tank length | 1.5 m | Tank diameter | 0.54 m | Pipe diameter | 0.055 m | Thickness of insulation layer at tank | 0.025 m | Thickness of insulation layer on pipe | 0.02 m |
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