Table A2
Material flows for 2021 State-of-art PERC/Closed-loop scenario.
| Scenario 2 Built-in Si − 46.6 g/MWh |
Input (g) | Feedstock | Waste/loss treatment | Output (g) | Use of recovered material (internal/external) |
||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Production process | Virgin | Recycled | Total input | Yield | EF | FR | P'R | E'C | Product | Unrecoverable waste | Recovered material | Total output | |
| MG silicon production* | 55.3 | 0 | 55.3 | 0.79 | 0 | 0 | 0.98 | 0.99 | 43.8 | 0.3 | 11.1 | 55.3 | External |
| Polysilicon production | 43.8 | 54.1 | 97.9 | 0.88 | 0.84 | 0.55 | 0 | 0 | 86.6 | 11.3 | 0 | 97.9 | |
| Cz ingot pulling | 86.6 | 62.5 | 149.2 | 0.98 | 0.96 | 0.42 | 0 | 0 | 146.2 | 3.0 | 0 | 149.2 | |
| Cropping and squaring | 146.2 | 0 | 146.2 | 0.55 | 0 | 0 | 0.98 | 0.96 | 79.7 | 2.7 | 62.5 | 146.2 | Internal |
| Wafering | 79.7 | 0 | 79.7 | 0.68 | 0 | 0 | 0.99 | 0.65 | 54.1 | 4.8 | 16.5 | 79.7 | Internal |
| PERC cells production | 54.1 | 0 | 54.1 | 0.88 | 0 | 0 | 0 | 0 | 47.6 | 6.6 | 0 | 54.1 | |
| Module assembly | 47.6 | 0 | 47.6 | 0.98 | 0 | 0 | 0 | 0 | 46.6 | 1.0 | 0 | 47.6 | |
| End-of-life | CR | EC | |||||||||||
| Photovoltaic waste | 46.6 | 0.85 | 0.95 | 8.0 | 37.6 | 47.6 | Internal | ||||||
*The mass of material entering MG silicon production is transformed to mass of silicon in quartzite (SiO2). Silicon corresponds to around 46.75% weight in quartzite [45].
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