Distribution of solar diffuse fraction in Taiwan

Chia Wei Kuo, Wen Chey Chang, Keh Chin Chang

Research output: Contribution to journalConference articlepeer-review

1 Citation (Scopus)


A simple polynomial model of the sky clearness index as predictor was proposed in this paper, for estimating the hourly solar diffuse fractions in Taiwan. The error analysis was performed through two statistical indicators, the mean bias error and the root-mean-square error. The out of database validation was also made to confirm the model generality. Next, regressions between monthly averaged conditions and geographical parameters of places (latitude, longitude, and elevation above sea level) were discussed, using the model's estimates and the updated data sets of typical solar radiation year. Based on the results, diffuse fraction maps for two observation periods were presented in 1-km resolution via an aid of linear interpolation.

Original languageEnglish
Pages (from-to)1120-1129
Number of pages10
JournalEnergy Procedia
Publication statusPublished - 2014
Event2013 ISES Solar World Congress, SWC 2013 - Cancun, Mexico
Duration: 2013 Nov 32013 Nov 7

All Science Journal Classification (ASJC) codes

  • Energy(all)

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