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SRML Glossary — "D" Special thanks to NREL We'd like to thank the National Renewable Energy Laboratory for making available to us their glossary, which is the basis of ours. We've edited and reformatted it, and linked it to our Web pages, and we'll continue to add our own specialized terms, illustrations, and examples. Please note that the Solar Radiation Monitoring Laboratory takes full responsibility for any inaccuracies that may occur. Links to other glossary sections: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
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The temperature at which the water in the atmosphere will condense as drops on a surface.
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Synonym for diffuse sky radiation.
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| The radiation
component that strikes a point from the sky, excluding circumsolar
radiation. In the absence of atmosphere, there should be almost no diffuse
sky radiation. High values are produced by an unclear atmosphere or reflections
from clouds.
Best Practices Handbook for the Collection and Use of Solar Resource Data for Solar Energy Applications: Third Edition (Figure 2.6) to see solar components | ||||
| Synonym
for beam radiation, the amount of solar
radiation from the direction of the sun.
Best Practices Handbook for the Collection and Use of Solar Resource Data for Solar Energy Applications: Third Edition (Figure 2.6) to see solar components. | ||||
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Daily, or the daily cycle. A diurnal plot is usually a representative midnight-to-midnight
graph of values measured at a smaller time interval (e.g., hourly or 5-minute values).
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In this context, always refers to the United States
Department of Energy,
although other departments may have the same acronym.
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| Air temperature
measured with a thermometer, similar to ambient
temperature. The term "dry-bulb" distinguishes it from the wet-bulb
temperature measured by a psychrometer to determine relative humidity.
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Links to other glossary sections: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z  © 2022, UO Solar Radiation Monitoring Laboratory. Last
revised: March 25, 2022.
Home page URL: solardata.uoregon.edu |