The Impact of Circumsolar Diffuse Radiation on the Numerical Computation and Forecasting of DNI

Xie, Yu; Yang, Jaemo; Sengupta, Manajit; Liu, Yangang

doi:10.1063/5.0169677

The Impact of Circumsolar Diffuse Radiation on the Numerical Computation and Forecasting of DNI

Conference · Fri Oct 06 00:00:00 EDT 2023

DOI:https://doi.org/10.1063/5.0169677· OSTI ID:2279170

Xie, Yu; Yang, Jaemo; ; Liu, Yangang

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.

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Research Organization:: National Renewable Energy Laboratory (NREL), Golden, CO (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Solar Energy Technologies Office

DOE Contract Number:: AC36-08GO28308

OSTI ID:: 2279170

Report Number(s):: NREL/CP-5D00-88471; MainId:89250; UUID:90a1aaba-d985-44ff-8acb-786cba4b8a8b; MainAdminID:71474

Country of Publication:: United States

Language:: English

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The Impact of Circumsolar Diffuse Radiation on the Numerical Computation and Forecasting of DNI

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