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SRML Glossary — "H" 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 amount of building heating needed, created by adding up all temperature differences of
the form ( 65°F - daily temperature in °F ) for each day in which the temperature
falls below 65°F.
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| A large
flat mirror, usually on a tracker so that it can continuously reflect the
sun's rays onto a central receiver.
A typical central receiver system requires hundreds of heliostats.
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| The amount
of water vapor in the air. Because the common measure of water vapor is
the ratio between the measured amount and the maximum possible amount (the
saturation point at which water condenses as dew), humidity and relative
humidity are generally used interchangeably.
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| A heating
system or energy generator that does not rely on one exclusive energy source.
For example, many domestic photovoltaic
systems use gasoline generators as backup systems during periods of extreme
cloudiness. Utility-scale hybrid solar
thermal power plants use sunlight to boil water, and an alternative
energy source such as natural gas when there is insufficient sunlight.
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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 30, 2022.
Home page URL: solardata.uoregon.edu |