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Yu Xie
National Renewable Energy Laboratory
PhysicsIce crystalsRadiationRadiative transferAtmospheric sciences
37Publications
14H-index
882Citations
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Publications 40
Newest
#1Yu XieH-Index: 14
#2Manajit SenguptaH-Index: 18
Last. Aron HabteH-Index: 8
view all 7 authors...
Summary By investigating the long-term observations at Atmospheric Radiation Measurement (ARM) Southern Great Plains (SGP), we find that the routinely used Beer-Bouguer-Lambert law and the models that empirically separate direct normal irradiance (DNI) from measurements of global horizontal irradiance (GHI) have dramatic and unexpected bias in computing cloudy-sky DNI. This bias has led to tremendous uncertainty in estimating the electricity generation by solar energy conversion systems. To effe...
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#1Yu Xie (NREL: National Renewable Energy Laboratory)H-Index: 14
#2Manajit Sengupta (NREL: National Renewable Energy Laboratory)H-Index: 18
Modeling of photovoltaics (PV) system performance requires numerical computation of plane-of-array (POA) irradiances that are influenced by atmospheric absorption and scattering. Clear-sky transmittance and reflectance of diffuse irradiance are essential for the understanding of solar radiation related to multiple reflection between land surface and clouds. This study analytically solves the radiative transfer equation for clear-sky conditions and numerically computes the transmittance and refle...
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#1Manajit Sengupta (NREL: National Renewable Energy Laboratory)H-Index: 18
#2Aron Habte (NREL: National Renewable Energy Laboratory)H-Index: 8
Last. Christian A. GueymardH-Index: 39
view all 11 authors...
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#2V. Lara-FanegoH-Index: 11
Last. Yu Xie (NREL: National Renewable Energy Laboratory)H-Index: 14
view all 4 authors...
Abstract This study defines albedo and reflectance in the context of solar applications. It examines the main sources of surface albedo data that can be used to help solar irradiance modeling efforts, such as undertaken by the National Renewable Energy Laboratory (NREL) over the Americas, for instance, per the National Solar Radiation Database (NSRDB). The MODIS-based albedo database, as used as input to derive historical time series of solar irradiance in the current version of the NSRDB, is co...
3 CitationsSource
#1Andrew Kumler (NREL: National Renewable Energy Laboratory)H-Index: 2
#2Yu Xie (NREL: National Renewable Energy Laboratory)H-Index: 14
Last. Yingchen Zhang (NREL: National Renewable Energy Laboratory)H-Index: 1
view all 3 authors...
Abstract Short-term solar forecasting models based solely on global horizontal irradiance (GHI) measurements are often unable to discriminate the forecasting of the factors affecting GHI from those that can be precisely computed by atmospheric models. This study introduces a Physics-based Smart Persistence model for Intra-hour forecasting of solar radiation (PSPI) that decomposes the forecasting of GHI into the computation of extraterrestrial solar radiation and solar zenith angle and the foreca...
2 CitationsSource
#1Aron Habte (NREL: National Renewable Energy Laboratory)H-Index: 8
#2Manajit Sengupta (NREL: National Renewable Energy Laboratory)H-Index: 18
Last. Frank Vignola (UO: University of Oregon)H-Index: 14
view all 9 authors...
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#1Yu Xie (NREL: National Renewable Energy Laboratory)H-Index: 14
#2Anthony Lopez (NREL: National Renewable Energy Laboratory)H-Index: 12
Last. Manajit Sengupta (NREL: National Renewable Energy Laboratory)H-Index: 18
view all 4 authors...
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#1Yu Xie (NREL: National Renewable Energy Laboratory)H-Index: 14
#2Manajit Sengupta (NREL: National Renewable Energy Laboratory)H-Index: 18
Last. Chenxi Wang (UMD: University of Maryland, College Park)H-Index: 1
view all 3 authors...
Abstract The Fast All-sky Radiation Model for Solar applications with Narrowband Irradiances on Tilted surfaces (FARMS-NIT) reported in Part I of this study is enhanced to include the requirements for cloudy-sky conditions. Surface radiances in 2002 narrow-wavelength bands from 0.28 to 4.0 μm are analytically computed by solving the radiative transfer equation for five independent photon paths accounting for clear-sky absorption, Rayleigh scattering, and cloud absorption and scattering. The Simp...
2 CitationsSource
#1Andrew Kumler (NREL: National Renewable Energy Laboratory)H-Index: 2
#2Yu Xie (NREL: National Renewable Energy Laboratory)H-Index: 14
Last. Yingchen Zhang (NREL: National Renewable Energy Laboratory)H-Index: 1
view all 3 authors...
Source
#1Aron Habte (NREL: National Renewable Energy Laboratory)H-Index: 8
#2Manajit Sengupta (NREL: National Renewable Energy Laboratory)H-Index: 18
Last. Galen J. Maclaurin (NREL: National Renewable Energy Laboratory)H-Index: 1
view all 5 authors...
Applying traceable and standardized uncertainty characterization for solar resource data provides confidence in the dataset for use by financiers, developers and site operators of solar energy conversion systems, and ultimately reduces deployment cost. Performance guarantees of solar energy conversion systems are based on the available solar resource from measurement stations or modeled dataset such as the National Solar Radiation Database (NSRDB). In this study we implemented a comprehensive un...
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