Investigation of Sheltering Effect on Global Solar Radiation Data Measured by Weather Stations

Keh Chin Chang, Hung Hsun Chen

Research output: Contribution to journalConference articlepeer-review

Abstract

In instalment of pyranometers at the weather stations for measuring global solar radiation, it often cannot avoid appearance of obstacles in their surroundings. Investigation of sheltering effect on measurement of global solar radiation is performed through introducing the shelter view factor. Evaluation of the shelter view factor is made by means of a fisheye-lens photograph together with the calculation method developed by Steyn (1980). Taitung weather station (TWS) is chosen for the study. The shelter view factor for the pyranometer installed at TWS is estimated to be 11.8%. Measurements of global solar radiation are conducted at a place where is located nearby TSW but with the condition of zero shelter view factor. Comparison of the data measured at these two sites indicates 4%-25% deviations of global solar radiation observed in different months of 2017. It suggests a need of the correction to the sheltering effect in the measuring process of global solar radiation at the weather stations except those who are not subject to surrounding obstacles in the sky dome.

Original languageEnglish
Article number02002
JournalE3S Web of Conferences
Volume93
DOIs
Publication statusPublished - 2019 Apr 17
Event2018 International Conference on Green Energy and Environment Engineering, CGEEE 2018 - Kitahiroshima, Japan
Duration: 2018 Aug 272018 Aug 29

All Science Journal Classification (ASJC) codes

  • Environmental Science(all)
  • Energy(all)
  • Earth and Planetary Sciences(all)

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