Solar energy collection
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United States of America Patent
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Jun 11, 2013
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N/A
app pub date -
Oct 5, 2009
filing date -
Oct 3, 2008
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Abstract
A solar collector apparatus with Dewar-type evacuated tubes results in the more efficient collection of solar radiation by, for example, maintaining the level of a volatile liquid flowing into the solar collector so that no more than 80% of the volume of an inner cylinder of a collection tube is filled with liquid and a corresponding manifold collects the vapor produced when heat is transferred from the surface of the inner glass cylinder that absorbs solar radiation to the volatile liquid. The aforementioned apparatus may likewise be used to heat a liquid within an absorber tube, the liquid having a volatile and a non-volatile component. As heat is transferred to the liquid, a fraction of the volatile component is converted to vapor, leaving the liquid more concentrated in the non-volatile component.
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