National Renewable Energy Laboratory (NREL) recently published a study of the effects of clouds in the coverage of photovoltaic systems.
NREL is one of 10 laboratories to support "the U.S. Department of Energy (DOE) Office of Science, and is the only laboratory that invests in research, development, marketing and distribution of solar energy and techniques to maximize energy efficiency.
NREL data from a study conducted in two periods of one year from 17 solar panels installed on the island of Oahu, near Honolulu International Airport, Hawaii.
The photovoltaic system is a powerful resource, allowing us to study and understand the weaknesses of solar energy production.
Photovoltaic energy is one of the cleanest forms of renewable energy, solar prices fall and it is also one of the cheapest forms of energy, some manufacturers who sell at a price of $ 1 per watt.
Unfortunately, the production of photovoltaic energy is not constant and depends heavily on weather conditions, plus the fact that there is no energy during the hours of darkness and photovoltaic modules to react quickly to changes in the intensity of sunlight.
There are dark days, but scientists using data from this study can be a very useful tool for developers and installers of solar panels to maximize the efficiency of photovoltaic modules instead given by the clouds by intermittently.
It is hoped that solar panels are able to analyze the properties of the cloud shadows, and a reliable model to predict the long-term viability.
A discovery is not so surprising is that the larger systems tend to show a "softened" in terms of energy production and therefore, if one examines in detail
can help designers to align the solar panels, or combine them in order to mitigate the impact of cloud cover.
The data from this study can be used for photovoltaic systems that can accommodate up to 30 mW.
These data can be found on "Measurement and Instrumentation Data Center" (MIDC) NREL seeks SOLRMAP: Kalaeloa Oahu.
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