ENERGY HARVESTING SYSTEM
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United States of America Patent
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Issued Date -
Aug 30, 2012
app pub date -
Dec 30, 2011
filing date -
Feb 28, 2011
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
An energy harvesting system for converting thermal energy to mechanical energy includes a heat engine that operates using a shape memory alloy active material. The shape memory alloy member may be in thermal communication with a hot region at a first temperature and a cold region at a second temperature lower than the first temperature. The shape memory alloy material may be configured to selectively change crystallographic phase between martensite to austenite and thereby one of contract and expand in response to the first and second temperatures. A driven component, such as an electric generator, may be selectively coupled with the heat engine through a coupling device, which may be controlled via a controller.
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