Evaluation of hourly solar radiation on inclined surfaces at Seoul by Photographical Method

Kapchun Yoon, Gyeong Yun, Jongug Jeon, Kang Soo Kim

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

Generally, a proper solar radiation model considers nothing more than the angle of inclination of a slope, without considering the influence of obstacles and surrounding buildings. In this study, we proposed a Photographical Method, which can increase the prediction accuracy of solar radiation on an inclined surface, with considering the shape of obstacles in the sky view. This paper evaluated twenty cases (5 solar radiation models in each of 4 albedo models), by the new method of the Photographical Method (PM). The following conclusions were drawn: (1) The prediction accuracy of solar radiation on an inclined surface was improved in all twenty cases with the PM. (2) The new method showed a higher degree of improvement of prediction accuracy in the low range of solar radiation (a high proportion of diffuse solar radiation). (3) The prediction accuracy of solar radiation with the PM improves with increasing tilt angle from the horizontal to the vertical. Applying the Photographical Method is more suited to an urban region with a forest of buildings, than a region of wide grasslands and sunny climate.

Original languageEnglish
Pages (from-to)203-216
Number of pages14
JournalSolar Energy
Volume100
DOIs
Publication statusPublished - 2014 Feb

Keywords

  • Empirical validation
  • Inclined surface
  • Photographical Method
  • Solar radiation

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

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