Journal of Biosystems Engineering

Korean Society for Agricultural Machinery (한국농업기계학회)
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Modeling of Solar Radiation Using Silicon Solar Module

  • Kim, Joon-Yong (Dept. of Biosystems Engineering, Seoul National University) ;
  • Yang, Seung-Hwan (Center for Safety Measurement, Korea Research Institute of Standards and Science) ;
  • Lee, Chun-Gu (Dept. of Biosystems Engineering, Seoul National University) ;
  • Kim, Young-Joo (Environmentally Materials & Components Center, Korea Institute of Industrial Technology) ;
  • Kim, Hak-Jin (Dept. of Biosystems Engineering, Seoul National University) ;
  • Cho, Seong-In (Dept. of Biosystems Engineering, Seoul National University) ;
  • Rhee, Joong-Yong (Dept. of Biosystems Engineering, Seoul National University)
  • Received : 2011.12.08
  • Accepted : 2012.02.29
  • Published : 2012.02.25
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Abstract

Purpose: Short-circuit current of a solar module that is widely used as a power source for wireless environmental sensors is proportional to solar radiation although there are a lot of factors affecting the short-circuit current. The objective of this study is to develop a model for estimating solar radiation for using the solar module as a power source and an irradiance sensor. Methods: An experiment system collected data on the short-circuit current and environmental factors (ambient temperature, cloud cover and solar radiation) during 65 days. Based on these data, two linear regression models and a non-linear regression model were developed and evaluated. Results: The best model was a linear regression model with short-circuit current, angle of incidence and cloud cover and its overall RMSE(Root Means Square Error) was 66.671 $W/m^2$. The other linear model (RMSE 69.038 $W/m^2$) was also acceptable when the cloud cover data is not available.

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References

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