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Glossary of Solar Radiation Resource Terms |
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Other relevant glossaries
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Heating Degree-Days -
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.
Heliostat -
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.
Humidity -
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.
Hybrid System -
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.
The following links allow you to move to the words beginning
with that letter.
A B C D E F G
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