Optimization of three and four junction solar cell CPV systems using ray tracing and SPICE modeling
Why this work is in the frame
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Bibliographic record
Abstract
Concentrating optics generally produce spatially and spectrally non-uniform optical profiles across the multijunction solar cells typically used in a concentrator photovoltaic (CPV) systems, degrading fill factors and thereby reducing module efficiencies. These effects maybe more pronounced if the primary-to-secondary distance is sub-optimal and if the system does not track the sun accurately. We integrate ray tracing with a distributed equivalent circuit model to simulate the performance of a three and four junction solar cells under a Fresnel-lens-based CPV system of 1250X geometric concentration. The impact on system efficiency of varying the primary-to-secondary distance is evaluated. Our results indicate a relative enhancement of 11.5 % for the triple junction lattice matched, 9.2% for the triple junction inverted metamorphic design and 8% for the four junction lattice matched design when we optimize the primary-to-secondary distance based on an integrated systems approach using the full optical distribution as an input to a 2-D distributed equivalent circuit model of the MJSC, as opposed to a uniform profile 1-D treatment.
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Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it