A5037606579- Solar Radiation and Photovoltaics
- Calibration and Measurement Techniques
- Soil Moisture and Remote Sensing
- Photovoltaic System Optimization Techniques
- Atmospheric Ozone and Climate
- solar cell performance optimization
- Atmospheric aerosols and clouds
- Spacecraft and Cryogenic Technologies
- Meteorological Phenomena and Simulations
- Solar Thermal and Photovoltaic Systems
- Atmospheric and Environmental Gas Dynamics
- Scientific Measurement and Uncertainty Evaluation
- Ionosphere and magnetosphere dynamics
- Solar and Space Plasma Dynamics
- Astronomical Observations and Instrumentation
- Chemistry and Stereochemistry Studies
- Geophysics and Gravity Measurements
- Precipitation Measurement and Analysis
- Radiative Heat Transfer Studies
- Sensor Technology and Measurement Systems
- Photovoltaic Systems and Sustainability
- Climate variability and models
- Advanced Breast Cancer Therapies
- Oceanographic and Atmospheric Processes
- Inertial Sensor and Navigation
National Renewable Energy Laboratory
2015-2024
The SRRL was established at the Solar Energy Research Institute (now NREL) in 1981 to provide continuous measurements of solar resources, outdoor calibrations pyranometers and pyrheliometers, characterize commercially available instrumentation. is an laboratory located on South Table Mountain, a mesa providing excellent access throughout year, overlooking Denver. Beginning with basic global horizontal irradiance, direct normal irradiance diffuse 5-minute intervals, Baseline Measurement...
The Measurements and Instrumentation Team within the Distributed Energy Resources Center at National Renewable Laboratory, NREL, calibrates pyranometers for outdoor testing solar energy conversion systems. team also supports climate change research programs. These activities led NREL to improve pyranometer calibrations. Low thermal-offset radiometers measuring sky diffuse component of reference irradiance removes bias errors on order 20 Watts per square meter (W/m2) in calibration...
Abstract In the most comprehensive pyrheliometer comparison known to date, 33 instruments were deployed measure direct normal solar radiation over a 10-month period in Golden, Colorado. The goal was determine their performance relative four electrical-substitution cavity radiometers that calibrated against World Radiometric Reference (WRR) is maintained at Radiation Center Davos, Switzerland. Because of intermittent cabling problems with one radiometers, average three windowed, served as...
Abstract Delamination of the encapsulant in photovoltaic (PV) module technology results immediate optical loss and may enable subsequent corrosion or mechanical damage. The effects artificial weathering were not previously known; therefore, an empirical study was performed to survey factors most affecting adhesion, including ultraviolet (UV) source (ie, Xe fluorescent lamp[s]), filters for lamp, chamber temperature, relative humidity. Natural also at locations, following: Golden, Colorado;...
Evaluating the performance of photovoltaic (PV) devices in laboratory and field requires accurate knowledge optical radiation stimulating devices. We briefly describe radiometric instrumentation used for characterizing broadband spectral irradiance PV applications. Spectral measurement systems are to characterize solar simulators (continuous pulsed, or flash sources) natural sunlight. Broadband radiometers (pyranometers pyrheliometers) assess resources renewable applications develop validate...
This measurement station monitors global horizontal, direct normal, and diffuse horizontal irradiance to define the amount of solar energy that hits this particular location.
The second ARM (Atmospheric Radiation Measurement) Enhanced Shortwave Experiment (ARESE II) used a single aircraft flying above the north central Oklahoma Southern Great Plains facility to measure atmospheric absorption in column of air between surface and Twin Otter altitude ceiling around 7 km on both clear overcast days. For this experiment, three types broadband radiometers were upwelling downwelling shortwave flux at km. This provided redundancy that was lacking first ARESE. Further,...
Abstract Accurate solar radiation measured by radiometers depends on instrument performance specifications, installation method, calibration procedure, measurement conditions, maintenance practices, location, and environmental conditions. This study addresses the effect of different methodologies resulting differences provided radiometric service providers such as National Renewable Energy Laboratory (NREL) manufacturers radiometers. Some these methods calibrate indoors some outdoors. To...
Flashing artificial light sources are used extensively in photovoltaic module performance testing and plant production lines. There several means of attempting to measure the spectral distribution a flash light; however, many these approaches generally capture entire pulse energy. We report here on design system waveform at individual wavelengths light. Any period within duration can be selected, over which integrate flux intensity each wavelength. The resulting is compared with reference...
Evaluating photovoltaic cells, modules, arrays, and system performance relies on accurate measurements of the solar radiation resources available for power conversion. Measuring accurately can lead to a reduction in investment risks associated with installing operating energy systems. The National Renewable Energy Laboratory's Solar Radiation Research Laboratory collects disseminates irradiance data provides calibrations broadband radiometers that are traceable international standards. It is...