Effects of lens temperature on irradiance profile and chromatic aberration for CPV optics
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Bibliographic record
Abstract
Lens-based optical concentrators are currently the most common in concentrator photovoltaic systems. This paper discusses experimental results to quantify the effects of temperature on the primary optical elements of three commercial Fresnel-based designs. The designs are: Silicon on Glass Primary with no secondary, PMMA Primary with a Truncated Inverted Pyramid secondary, and a PMMA 4 quadrant Fresnel – Köhler system. We quantify the effects of temperature on the irradiance profile with the variation in peak to average ratio of from 25 – 50 ° C. Furthermore, the effect of temperature on chromatic aberration is represented with the ratio of the top subcell current to middle subcell for a standard triple junction germanium-based cell. For the system with the lowest peak-to-average ratio, PMMA-based 4 Fresnel-Kohler design, we observed a change of 2% in the subcell ratio when the lens was heated to 50 °C.
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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 | 0.000 |
| 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)
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Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
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