The Impact of Circumsolar Diffuse Radiation on the Numerical Computation and Forecasting of DNI: Paper No. 150004

Research output: Contribution to conferencePaper

Abstract

Weather Research and Forecasting model with solar extensions (WRF-Solar) uses the Fast All-sky Radiation Model for Solar applications (FARMS) to predict solar radiation from the forecasted atmospheric gases, aerosols, and clouds. The Beer-Bouguer-Lambert law utilized by FARMS as well as other radiative transfer models assumes Direct Normal Irradiance (DNI) is a narrow beam only covering the sun disk. This assumption is interpreted differently in solar observations by pyrheliometers where the circumsolar diffuse radiation is accounted. This study precisely computes circumsolar diffuse radiation in all-sky conditions using a radiative transfer model based on a parameterization of precomputed cloud transmittance and reflectance. The model is implemented in WRF-Solar to provide day-ahead DNI forecast in the north America. The computation and forecasting of DNI is compared with the Beer-Bouguer-Lambert law to understand the impact of circumsolar diffuse radiation.
Original languageAmerican English
Number of pages6
DOIs
StatePublished - 2023
EventSolarPACES: Solar Power & Chemical Energy Systems: 27th International Conference on Concentrating Solar Power and Chemical Energy Systems - Online
Duration: 27 Sep 20211 Oct 2021

Conference

ConferenceSolarPACES: Solar Power & Chemical Energy Systems: 27th International Conference on Concentrating Solar Power and Chemical Energy Systems
CityOnline
Period27/09/211/10/21

NREL Publication Number

  • NREL/CP-5D00-88471

Keywords

  • aerosols
  • atmospheric optical phenomena
  • atmospheric radiation
  • brain machine interfaces
  • diffuse radiation
  • optical properties
  • radiative transfer

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