Modeling of Diffuse Fraction of Solar Energy in Taiwan

• Main Authors: Hsien-ChunLaio, 廖顯峻
• Other Authors: Keh-Chin Chang
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/63613271654859800421

碩士 === 國立成功大學 === 航空太空工程學系碩博士班 === 101 === Solar energy is the most available green energy for Taiwan where is located in Subtropics with abundant solar irradiation. Thus, Taiwan is suitable to develop solar energy applications. The global solar intensity is consisted of two parts: beam radiation and diffuse radiation, the portion of these two parts would affect the way how we design the application systems of solar energy. Concentration of solar intensity can be performed through the concentrating techniques. It is necessary to understand the distribution of solar diffusion fraction in Taiwan. This research utilizes the diffuse radiation data measured at Kuei-Jen in Tainan together with the global radiation data measured by the Taiwan station of Central weather Bureau and, then, fit a model by means of linear regression. Next, to set a database in a so called Typical Meteorological Year (TMY) which represents a long term solar data for Taiwan. This research predicts a diffuse fraction map of Taiwan for each month. The result shows that the average diffuse fraction is among 40% to 50% for almost everywhere in Taiwan, and with the following tendencies: (1) the diffuse fraction increases with the latitude is increased, 55% in Taipei. (2) the diffuse fraction in the plains region is higher than that in the mountain area in the winter season, and it becomes opposite in the summer season. The yearly distribution of the diffuse fraction in Taiwan area in finally constructed.