Performance of Different Types of ETSC Solar Irradiance Sensors
| Autor: | Kirn, B., Jankovec, M., Brecl, K., Topic, M. |
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| Jazyk: | angličtina |
| Rok vydání: | 2013 |
| Předmět: | |
| DOI: | 10.4229/28theupvsec2013-4av.5.9 |
| Popis: | 28th European Photovoltaic Solar Energy Conference and Exhibition; 3196-3199 For PV system performance monitoring, an accurate solar irradiance measurement is necessary in order to calculate performance indicators or schedule maintenance. Thermopile pyranometers render best results on one hand, but on the other hand equivalent technology solar cell (ETSC) irradiance sensors present adequate alternative due to their low cost. In order to evaluate their performance, we put different types of commercially available ETSC sensors on our outdoor monitoring site for the three months outdoor testing. As a reference we took first class thermopile pyranometer. The effects of operating temperature, solar irradiance angle and spectral distribution were isolated as effective as possible with the use of data filtration and statistical analysis. Results show that ETSC sensors can exhibit high variation during the day reaching more than 10% of uncertainty. The main source of error is their angular dependence which is more pronounced in the early and late hours of the day. Further, spectral mismatch errors can be isolated by using data close to the midday and applying temperature compensation. Additionally we tried to isolate spectral mismatch errors comparing results at different ratios of diffuse and total solar irradiance. Finally, we evaluate thermal compensation techniques of sensors, where the internal passive temperature compensation technique gave the most accurate results. |
| Databáze: | OpenAIRE |
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