MOISTURE-PROOF EXPANSION CHAMBER FOR EQUALIZING PRESSURE IN SEALED CONCENTRATOR PHOTOVOLTAIC SOLAR MODULES
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United States of America Patent
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app pub date -
Jan 6, 2011
filing date -
Jan 7, 2010
priority date (Note) -
Abandoned
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Abstract
A concentrator-type photovoltaic device includes at least one light receiving module having a plurality of photovoltaic devices therein, and a pressure regulating device comprising a volume-adjustable chamber that is pneumatically coupled to the at least one light receiving module. The volume-adjustable chamber may be configured to expand and contract in response to temperature fluctuations within the at least one light receiving module. The volume-adjustable chamber can be made from a flexible metalized film with a low water vapor transmission rate. In this way the module can remain sealed from water penetration and yet maintain uniform internal pressure during thermal excursions. The volume-adjustable chamber may be combined with a desiccant such that, as air moves into the expansion chamber, it passes over the desiccant, which removes moisture that has penetrated into the sealed module.
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