NEWS

2023.07.21

【Report】The 57th AJI Frontier Seminar on "Graphical decomposition model to estimate hourly global solar radiation considering weather stochasticity” was held!

On July 18, 2023, from 13:00 – 14:00, the 57th AJI Research Frontier Seminar took place online. You Li, of Asia-Japan Research Institute, Ritsumeikan University, Ibaraki, Osaka, 567-8570, Japan gave a presentation entitled "Graphical decomposition model to estimate hourly global solar radiation considering weather stochasticity.”

He reported on a paper his research team has recently published in the bi-weekly science Journal, Energy Conversion and Management. This paper introduces a new model for increasing the accuracy of measuring solar radiation. Solar energy is becoming increasingly used in various fields, such as Solar-powered desalination unit, building cooling/heating, as well as agricultural and biological sectors with the advantage that it does not contribute to climate change. He proposed a graphical solar radiation decomposition model based on the solar radiation daily pattern which can be achieved by clustering, regression, classification, and identification of meteorological data (including solar radiation).

He reported that his team had successfully developed a system that allows reliable prediction of hourly global solar radiation with 8.3% greater accuracy compared to the commonly used model. They also found that weather, cloud cover, and sunshine duration have a good temporal consistency on the solar radiation daily patterns. Whereas by using general clustering methods it is difficult to characterize the seasonal features of solar radiation, his work presents a new method for removing the geometric features of solar radiation. Using his team’s method, new products and services can be developed as it is easy to evaluate the characteristics of new facilities for photovoltaic systems based on their location and season.

You Li presented his topic clearly explained this technical topic and made it easy for non-specialists to understand his project. His interesting lecture was followed by a dynamic Q&A session about the relation between solar radiation and actual energy production and overcoming the issues of darkness and bad weather by developing advanced storage methods. When asked about AI, he explained that while AI might come up with similar answers, it could not provide a precise description of the process involved. In conclusion, the audience really appreciated this informative presentation on frontier research subject.

Dr. You Li delivering his presentation

Please visit the following link for previous AJI Frontier Seminars:
https://en.ritsumei.ac.jp/research/aji/young_researcher/seminar/archive/